Oracle Spatial Topology And Network Data S Developer's Guide
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Oracle® Spatial Topology and Network Data Models 10g Release 2 (10.2) B14256-02 January 2006 Provides usage and reference information about the topology data model and network data model capabilities of Oracle Spatial. Oracle Spatial Topology and Network Data Models, 10g Release 2 (10.2) B14256-02 Copyright © 2003, 2006, Oracle. All rights reserved. Primary Author: Contributors: Chuck Murray Ning An, Bruce Blackwell, Janet Blowney, Frank Lee, Siva Ravada, Jack Wang The Programs (which include both the software and documentation) contain proprietary information; they are provided under a license agreement containing restrictions on use and disclosure and are also protected by copyright, patent, and other intellectual and industrial property laws. Reverse engineering, disassembly, or decompilation of the Programs, except to the extent required to obtain interoperability with other independently created software or as specified by law, is prohibited. 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Contents Preface ............................................................................................................................................................... xv Audience..................................................................................................................................................... Documentation Accessibility ................................................................................................................... Related Documents ................................................................................................................................... Conventions ............................................................................................................................................... xv xv xvi xvi What’s New in the Topology and Network Data Models? ................................................. xvii New SDO_TOPO_MAP Subprograms.................................................................................................. Additional Topology Operators............................................................................................................ New GET_TGL_OBJECTS Member Function ..................................................................................... Collection Layers ..................................................................................................................................... Features Built from Topological Elements in Parent Layers............................................................. New Format for Topology Operators and SDO_TOPO.RELATE Function ..................................... Simplified Process for Exporting and Importing Topologies ............................................................. SDO_NET_MEM Package for Network Editing and Analysis........................................................... Bidirected Links......................................................................................................................................... Cost Computation by a PL/SQL Function ............................................................................................ Part I 1 xvii xviii xviii xviii xviii xix xix xix xix xix Topology Data Model Topology Data Model Overview 1.1 1.1.1 1.1.2 1.2 1.3 1.3.1 1.3.2 1.4 1.5 1.5.1 1.5.2 1.5.3 1.5.4 1.5.5 Main Steps in Using Topology Data ........................................................................................ 1-2 Using a Topology Built from Topology Data .................................................................. 1-2 Using a Topology Built from Spatial Geometries ........................................................... 1-3 Topology Data Model Concepts ............................................................................................... 1-3 Topology Geometries and Layers............................................................................................. 1-6 Features ................................................................................................................................. 1-7 Collection Layers ................................................................................................................. 1-8 Topology Geometry Layer Hierarchy...................................................................................... 1-9 Topology Data Model Tables ................................................................................................. 1-13 Edge Information Table ................................................................................................... 1-14 Node Information Table .................................................................................................. 1-15 Face Information Table .................................................................................................... 1-16 Relationship Information Table ...................................................................................... 1-16 History Information Table............................................................................................... 1-17 iii 1.6 1.6.1 1.6.2 1.6.2.1 1.6.2.2 1.6.2.3 1.6.2.4 1.6.3 1.6.4 1.6.5 1.6.6 1.6.7 1.7 1.7.1 1.7.2 1.8 1.8.1 1.8.2 1.9 1.10 1.10.1 1.10.2 1.11 1.12 1.12.1 1.12.2 1.13 2 Topology Data Types .............................................................................................................. SDO_TOPO_GEOMETRY Type ..................................................................................... SDO_TOPO_GEOMETRY Constructors ....................................................................... Constructors for Insert Operations: Specifying Topological Elements ............. Constructors for Insert Operations: Specifying Lower-Level Features ............. Constructors for Update Operations: Specifying Topological Elements .......... Constructors for Update Operations: Specifying Lower-Level Features .......... GET_GEOMETRY Member Function ............................................................................ GET_TGL_OBJECTS Member Function ........................................................................ GET_TOPO_ELEMENTS Member Function ................................................................ SDO_LIST_TYPE Type..................................................................................................... SDO_EDGE_ARRAY and SDO_NUMBER_ARRAY Types....................................... Topology Metadata Views...................................................................................................... xxx_SDO_TOPO_INFO Views........................................................................................ xxx_SDO_TOPO_METADATA Views .......................................................................... Topology Application Programming Interface ................................................................... Topology Operators ......................................................................................................... Topology Data Model Java Interface ............................................................................. Exporting and Importing Topology Data............................................................................. Cross-Schema Usage and Editing Considerations .............................................................. Cross-Schema Topology Usage ...................................................................................... Cross-Schema Topology Editing .................................................................................... Function-Based Indexes Not Supported............................................................................... Topology Examples (PL/SQL)............................................................................................... Topology Built from Topology Data.............................................................................. Topology Built from Spatial Geometries....................................................................... README File for Spatial and Related Features .................................................................. 1-19 1-19 1-20 1-21 1-22 1-22 1-23 1-24 1-25 1-25 1-26 1-26 1-26 1-26 1-27 1-29 1-29 1-32 1-32 1-33 1-33 1-34 1-34 1-34 1-34 1-44 1-50 Editing Topologies 2.1 Approaches for Editing Topology Data .................................................................................. 2-1 2.1.1 TopoMap Objects................................................................................................................. 2-2 2.1.2 Specifying the Editing Approach with the Topology Parameter ................................. 2-2 2.1.3 Using GET_xxx Topology Functions ................................................................................ 2-3 2.1.4 Process for Editing Using Cache Explicitly (PL/SQL API) ........................................... 2-3 2.1.5 Process for Editing Using the Java API ............................................................................ 2-5 2.1.6 Error Handling for Topology Editing............................................................................... 2-7 2.1.6.1 Input Parameter Errors ................................................................................................ 2-7 2.1.6.2 All Exceptions ............................................................................................................... 2-8 2.2 Performing Operations on Nodes ............................................................................................ 2-8 2.2.1 Adding a Node..................................................................................................................... 2-8 2.2.2 Moving a Node ................................................................................................................. 2-10 2.2.2.1 Additional Examples of Allowed and Disallowed Node Moves ....................... 2-12 2.2.3 Removing a Node ............................................................................................................. 2-13 2.2.4 Removing Obsolete Nodes .............................................................................................. 2-14 2.3 Performing Operations on Edges .......................................................................................... 2-15 2.3.1 Adding an Edge ................................................................................................................ 2-15 2.3.2 Moving an Edge ................................................................................................................ 2-16 iv 2.3.3 2.3.4 3 Removing an Edge............................................................................................................ 2-17 Updating an Edge ............................................................................................................. 2-18 SDO_TOPO Package Subprograms SDO_TOPO.ADD_TOPO_GEOMETRY_LAYER................................................................... 3-2 SDO_TOPO.CREATE_TOPOLOGY......................................................................................... 3-4 SDO_TOPO.DELETE_TOPO_GEOMETRY_LAYER ............................................................ 3-6 SDO_TOPO.DROP_TOPOLOGY ............................................................................................. 3-7 SDO_TOPO.GET_FACE_BOUNDARY................................................................................... 3-8 SDO_TOPO.GET_TOPO_OBJECTS ......................................................................................... 3-9 SDO_TOPO.INITIALIZE_AFTER_IMPORT ....................................................................... 3-11 SDO_TOPO.INITIALIZE_METADATA............................................................................... 3-12 SDO_TOPO.PREPARE_FOR_EXPORT ................................................................................ 3-13 SDO_TOPO.RELATE .............................................................................................................. 3-14 4 SDO_TOPO_MAP Package Subprograms SDO_TOPO_MAP.ADD_EDGE ............................................................................................... 4-2 SDO_TOPO_MAP.ADD_ISOLATED_NODE ........................................................................ 4-4 SDO_TOPO_MAP.ADD_LINEAR_GEOMETRY .................................................................. 4-6 SDO_TOPO_MAP.ADD_LOOP ............................................................................................... 4-8 SDO_TOPO_MAP.ADD_NODE ........................................................................................... 4-10 SDO_TOPO_MAP.ADD_POINT_GEOMETRY .................................................................. 4-12 SDO_TOPO_MAP.ADD_POLYGON_GEOMETRY........................................................... 4-14 SDO_TOPO_MAP.CHANGE_EDGE_COORDS................................................................. 4-16 SDO_TOPO_MAP.CLEAR_TOPO_MAP............................................................................. 4-18 SDO_TOPO_MAP.COMMIT_TOPO_MAP......................................................................... 4-19 SDO_TOPO_MAP.CREATE_EDGE_INDEX....................................................................... 4-20 SDO_TOPO_MAP.CREATE_FACE_INDEX ....................................................................... 4-21 SDO_TOPO_MAP.CREATE_FEATURE .............................................................................. 4-22 SDO_TOPO_MAP.CREATE_TOPO_MAP .......................................................................... 4-26 SDO_TOPO_MAP.DROP_TOPO_MAP............................................................................... 4-28 SDO_TOPO_MAP.GET_CONTAINING_FACE................................................................. 4-29 SDO_TOPO_MAP.GET_EDGE_ADDITIONS..................................................................... 4-31 SDO_TOPO_MAP.GET_EDGE_CHANGES ....................................................................... 4-32 SDO_TOPO_MAP.GET_EDGE_COORDS........................................................................... 4-33 SDO_TOPO_MAP.GET_EDGE_DELETIONS..................................................................... 4-34 SDO_TOPO_MAP.GET_EDGE_NODES.............................................................................. 4-35 SDO_TOPO_MAP.GET_FACE_ADDITIONS ..................................................................... 4-36 SDO_TOPO_MAP.GET_FACE_CHANGES ........................................................................ 4-37 SDO_TOPO_MAP.GET_FACE_BOUNDARY..................................................................... 4-38 SDO_TOPO_MAP.GET_FACE_DELETIONS ..................................................................... 4-39 v SDO_TOPO_MAP.GET_NEAREST_EDGE ......................................................................... 4-40 SDO_TOPO_MAP.GET_NEAREST_EDGE_IN_CACHE .................................................. 4-42 SDO_TOPO_MAP.GET_NEAREST_NODE ........................................................................ 4-44 SDO_TOPO_MAP.GET_NEAREST_NODE_IN_CACHE ................................................. 4-46 SDO_TOPO_MAP.GET_NODE_ADDITIONS.................................................................... 4-48 SDO_TOPO_MAP.GET_NODE_CHANGES....................................................................... 4-49 SDO_TOPO_MAP.GET_NODE_COORD............................................................................ 4-50 SDO_TOPO_MAP.GET_NODE_DELETIONS .................................................................... 4-51 SDO_TOPO_MAP.GET_NODE_FACE_STAR.................................................................... 4-52 SDO_TOPO_MAP.GET_NODE_STAR ................................................................................ 4-53 SDO_TOPO_MAP.GET_TOPO_NAME............................................................................... 4-54 SDO_TOPO_MAP.GET_TOPO_TRANSACTION_ID ....................................................... 4-55 SDO_TOPO_MAP.LIST_TOPO_MAPS................................................................................ 4-56 SDO_TOPO_MAP.LOAD_TOPO_MAP .............................................................................. 4-57 SDO_TOPO_MAP.MOVE_EDGE ......................................................................................... 4-61 SDO_TOPO_MAP.MOVE_ISOLATED_NODE .................................................................. 4-64 SDO_TOPO_MAP.MOVE_NODE ........................................................................................ 4-66 SDO_TOPO_MAP.REMOVE_EDGE .................................................................................... 4-68 SDO_TOPO_MAP.REMOVE_NODE ................................................................................... 4-69 SDO_TOPO_MAP.REMOVE_OBSOLETE_NODES........................................................... 4-70 SDO_TOPO_MAP.ROLLBACK_TOPO_MAP .................................................................... 4-71 SDO_TOPO_MAP.SEARCH_EDGE_RTREE_TOPO_MAP .............................................. 4-72 SDO_TOPO_MAP.SEARCH_FACE_RTREE_TOPO_MAP .............................................. 4-74 SDO_TOPO_MAP.SET_MAX_MEMORY_SIZE ................................................................. 4-76 SDO_TOPO_MAP.UPDATE_TOPO_MAP.......................................................................... 4-77 SDO_TOPO_MAP.VALIDATE_TOPO_MAP ..................................................................... 4-78 SDO_TOPO_MAP.VALIDATE_TOPOLOGY ..................................................................... 4-80 Part II 5 Network Data Model Overview 5.1 5.2 5.2.1 5.2.2 5.3 5.4 5.4.1 5.4.2 5.4.3 5.4.4 5.5 5.6 vi Network Data Model Introduction to Network Modeling.......................................................................................... Main Steps in Using the Network Data Model ...................................................................... Letting Spatial Perform Most Operations ........................................................................ Performing the Operations Yourself................................................................................. Network Data Model Concepts ................................................................................................ Network Applications ................................................................................................................ Road Network Example...................................................................................................... Train (Subway) Network Example ................................................................................... Utility Network Example ................................................................................................... Biochemical Network Example ......................................................................................... Network Hierarchy..................................................................................................................... Network Constraints .................................................................................................................. 5-1 5-3 5-3 5-4 5-5 5-6 5-6 5-7 5-7 5-7 5-7 5-8 5.7 Network Editing and Analysis Using a Network Memory Object ..................................... 5-9 5.8 Network Data Model Tables .................................................................................................. 5-10 5.8.1 Node Table......................................................................................................................... 5-11 5.8.2 Link Table .......................................................................................................................... 5-12 5.8.3 Path Table .......................................................................................................................... 5-13 5.8.4 Path-Link Table ................................................................................................................. 5-13 5.9 Network Data Model Metadata Views ................................................................................. 5-14 5.9.1 xxx_SDO_NETWORK_METADATA Views ................................................................ 5-14 5.9.2 xxx_SDO_NETWORK_CONSTRAINTS Views ........................................................... 5-16 5.10 Network Data Model Application Programming Interface .............................................. 5-16 5.10.1 Network Data Model PL/SQL Interface ....................................................................... 5-17 5.10.2 Network Data Model Java Interface .............................................................................. 5-19 5.10.2.1 Network Metadata and Data Management ........................................................... 5-20 5.10.2.2 Network Analysis...................................................................................................... 5-21 5.10.2.3 Major Interfaces and Methods in the Network Java API..................................... 5-21 5.11 Network Examples (PL/SQL)................................................................................................ 5-26 5.11.1 Simple Spatial (SDO) Network Example ...................................................................... 5-27 5.11.2 Simple Logical Network Example.................................................................................. 5-29 5.11.3 Spatial (LRS) Network Example..................................................................................... 5-30 5.11.4 Logical Hierarchical Network Example ........................................................................ 5-45 5.12 Network Editor and Other Demo Files................................................................................. 5-61 5.13 README File for Spatial and Related Features .................................................................. 5-61 6 SDO_NET Package Subprograms SDO_NET.COPY_NETWORK.................................................................................................. 6-2 SDO_NET.CREATE_LINK_TABLE ......................................................................................... 6-3 SDO_NET.CREATE_LOGICAL_NETWORK......................................................................... 6-4 SDO_NET.CREATE_LRS_NETWORK.................................................................................... 6-6 SDO_NET.CREATE_LRS_TABLE............................................................................................ 6-9 SDO_NET.CREATE_NODE_TABLE .................................................................................... 6-10 SDO_NET.CREATE_PATH_LINK_TABLE......................................................................... 6-11 SDO_NET.CREATE_PATH_TABLE..................................................................................... 6-12 SDO_NET.CREATE_SDO_NETWORK................................................................................ 6-13 SDO_NET.CREATE_TOPO_NETWORK............................................................................. 6-16 SDO_NET.DROP_NETWORK............................................................................................... 6-19 SDO_NET.GET_CHILD_LINKS............................................................................................ 6-20 SDO_NET.GET_CHILD_NODES.......................................................................................... 6-21 SDO_NET.GET_GEOMETRY_TYPE .................................................................................... 6-22 SDO_NET.GET_IN_LINKS .................................................................................................... 6-23 SDO_NET.GET_LINK_COST_COLUMN............................................................................ 6-24 SDO_NET.GET_LINK_DIRECTION .................................................................................... 6-25 SDO_NET.GET_LINK_GEOM_COLUMN.......................................................................... 6-26 SDO_NET.GET_LINK_GEOMETRY .................................................................................... 6-27 SDO_NET.GET_LINK_TABLE_NAME ............................................................................... 6-28 vii SDO_NET.GET_LRS_GEOM_COLUMN............................................................................. 6-29 SDO_NET.GET_LRS_LINK_GEOMETRY ........................................................................... 6-30 SDO_NET.GET_LRS_NODE_GEOMETRY ......................................................................... 6-31 SDO_NET.GET_LRS_TABLE_NAME .................................................................................. 6-32 SDO_NET.GET_NETWORK_TYPE ...................................................................................... 6-33 SDO_NET.GET_NO_OF_HIERARCHY_LEVELS .............................................................. 6-34 SDO_NET.GET_NO_OF_LINKS ........................................................................................... 6-35 SDO_NET.GET_NO_OF_NODES ......................................................................................... 6-36 SDO_NET.GET_NODE_DEGREE......................................................................................... 6-37 SDO_NET.GET_NODE_GEOM_COLUMN........................................................................ 6-38 SDO_NET.GET_NODE_GEOMETRY .................................................................................. 6-39 SDO_NET.GET_NODE_IN_DEGREE .................................................................................. 6-40 SDO_NET.GET_NODE_OUT_DEGREE .............................................................................. 6-41 SDO_NET.GET_NODE_TABLE_NAME ............................................................................. 6-42 SDO_NET.GET_OUT_LINKS ................................................................................................ 6-43 SDO_NET.GET_PATH_GEOM_COLUMN......................................................................... 6-44 SDO_NET.GET_PATH_TABLE_NAME .............................................................................. 6-45 SDO_NET.IS_HIERARCHICAL ............................................................................................ 6-46 SDO_NET.IS_LOGICAL ......................................................................................................... 6-47 SDO_NET.IS_SPATIAL .......................................................................................................... 6-48 SDO_NET.LRS_GEOMETRY_NETWORK .......................................................................... 6-49 SDO_NET.NETWORK_EXISTS............................................................................................. 6-50 SDO_NET.SDO_GEOMETRY_NETWORK ......................................................................... 6-51 SDO_NET.TOPO_GEOMETRY_NETWORK ...................................................................... 6-52 SDO_NET.VALIDATE_LINK_SCHEMA ............................................................................ 6-53 SDO_NET.VALIDATE_LRS_SCHEMA ............................................................................... 6-54 SDO_NET.VALIDATE_NETWORK ..................................................................................... 6-55 SDO_NET.VALIDATE_NODE_SCHEMA .......................................................................... 6-56 SDO_NET.VALIDATE_PATH_SCHEMA ........................................................................... 6-57 7 SDO_NET_MEM Package Subprograms SDO_NET_MEM.SET_MAX_MEMORY_SIZE ...................................................................... 7-3 SDO_NET_MEM.LINK.GET_CHILD_LINKS........................................................................ 7-4 SDO_NET_MEM.LINK.GET_CO_LINK_IDS ........................................................................ 7-5 SDO_NET_MEM.LINK.GET_COST ........................................................................................ 7-6 SDO_NET_MEM.LINK.GET_END_MEASURE .................................................................... 7-7 SDO_NET_MEM.LINK.GET_END_NODE_ID...................................................................... 7-8 SDO_NET_MEM.LINK.GET_GEOM_ID ................................................................................ 7-9 SDO_NET_MEM.LINK.GET_GEOMETRY ......................................................................... 7-10 SDO_NET_MEM.LINK.GET_LEVEL ................................................................................... 7-11 SDO_NET_MEM.LINK.GET_NAME ................................................................................... 7-12 SDO_NET_MEM.LINK.GET_PARENT_LINK_ID ............................................................. 7-13 viii SDO_NET_MEM.LINK.GET_SIBLING_LINK_IDS ........................................................... 7-14 SDO_NET_MEM.LINK.GET_START_MEASURE ............................................................. 7-15 SDO_NET_MEM.LINK.GET_START_NODE_ID............................................................... 7-16 SDO_NET_MEM.LINK.GET_STATE ................................................................................... 7-17 SDO_NET_MEM.LINK.GET_TYPE ...................................................................................... 7-18 SDO_NET_MEM.LINK.IS_ACTIVE ..................................................................................... 7-19 SDO_NET_MEM.LINK.IS_EXTERNAL_LINK................................................................... 7-20 SDO_NET_MEM.LINK.IS_LOGICAL .................................................................................. 7-21 SDO_NET_MEM.LINK.IS_TEMPORARY ........................................................................... 7-22 SDO_NET_MEM.LINK.SET_COST ...................................................................................... 7-23 SDO_NET_MEM.LINK.SET_END_NODE .......................................................................... 7-24 SDO_NET_MEM.LINK.SET_GEOM_ID .............................................................................. 7-25 SDO_NET_MEM.LINK.SET_GEOMETRY .......................................................................... 7-26 SDO_NET_MEM.LINK.SET_LEVEL .................................................................................... 7-27 SDO_NET_MEM.LINK.SET_MEASURE ............................................................................. 7-28 SDO_NET_MEM.LINK.SET_NAME .................................................................................... 7-29 SDO_NET_MEM.LINK.SET_PARENT_LINK .................................................................... 7-30 SDO_NET_MEM.LINK.SET_START_NODE ...................................................................... 7-31 SDO_NET_MEM.LINK.SET_STATE .................................................................................... 7-32 SDO_NET_MEM.LINK.SET_TYPE ....................................................................................... 7-33 SDO_NET_MEM.NETWORK.ADD_LINK.......................................................................... 7-34 SDO_NET_MEM.NETWORK.ADD_LRS_NODE .............................................................. 7-36 SDO_NET_MEM.NETWORK.ADD_NODE........................................................................ 7-38 SDO_NET_MEM.NETWORK.ADD_PATH ........................................................................ 7-39 SDO_NET_MEM.NETWORK.ADD_SDO_NODE ............................................................. 7-40 SDO_NET_MEM.NETWORK.DELETE_LINK.................................................................... 7-42 SDO_NET_MEM.NETWORK.DELETE_NODE.................................................................. 7-43 SDO_NET_MEM.NETWORK.DELETE_PATH .................................................................. 7-44 SDO_NET_MEM.NETWORK_MANAGER.ALL_PATHS ................................................ 7-45 SDO_NET_MEM.NETWORK_MANAGER.CREATE_LOGICAL_NETWORK ............ 7-47 SDO_NET_MEM.NETWORK_MANAGER.CREATE_LRS_NETWORK ....................... 7-49 SDO_NET_MEM.NETWORK_MANAGER.CREATE_REF_CONSTRAINTS ............... 7-51 SDO_NET_MEM.NETWORK_MANAGER.CREATE_SDO_NETWORK ...................... 7-52 SDO_NET_MEM.NETWORK_MANAGER.DISABLE_REF_CONSTRAINTS .............. 7-54 SDO_NET_MEM.NETWORK_MANAGER.DROP_NETWORK ..................................... 7-55 SDO_NET_MEM.NETWORK_MANAGER.ENABLE_REF_CONSTRAINTS ............... 7-56 SDO_NET_MEM.NETWORK_MANAGER.FIND_CONNECTED_COMPONENTS... 7-57 SDO_NET_MEM.NETWORK_MANAGER.FIND_REACHABLE_NODES................... 7-58 SDO_NET_MEM.NETWORK_MANAGER.FIND_REACHING_NODES ..................... 7-59 SDO_NET_MEM.NETWORK_MANAGER.IS_REACHABLE ......................................... 7-60 SDO_NET_MEM.NETWORK_MANAGER.LIST_NETWORKS ...................................... 7-61 ix SDO_NET_MEM.NETWORK_MANAGER.MCST_LINK ................................................ 7-62 SDO_NET_MEM.NETWORK_MANAGER.NEAREST_NEIGHBORS ........................... 7-63 SDO_NET_MEM.NETWORK_MANAGER.READ_NETWORK ..................................... 7-65 SDO_NET_MEM.NETWORK_MANAGER.SHORTEST_PATH ..................................... 7-66 SDO_NET_MEM.NETWORK_MANAGER.SHORTEST_PATH_DIJKSTRA ................ 7-68 SDO_NET_MEM.NETWORK_MANAGER.TSP_PATH ................................................... 7-70 SDO_NET_MEM.NETWORK_MANAGER.VALIDATE_NETWORK_SCHEMA ........ 7-72 SDO_NET_MEM.NETWORK_MANAGER.WITHIN_COST ........................................... 7-73 SDO_NET_MEM.NETWORK_MANAGER.WRITE_NETWORK.................................... 7-75 SDO_NET_MEM.NODE.GET_ADJACENT_NODE_IDS.................................................. 7-76 SDO_NET_MEM.NODE.GET_CHILD_NODE_IDS .......................................................... 7-77 SDO_NET_MEM.NODE.GET_COMPONENT_NO........................................................... 7-78 SDO_NET_MEM.NODE.GET_COST ................................................................................... 7-79 SDO_NET_MEM.NODE.GET_EXTERNAL_NETWORK_ID ........................................... 7-80 SDO_NET_MEM.NODE.GET_EXTERNAL_NETWORK_NAME................................... 7-81 SDO_NET_MEM.NODE.GET_EXTERNAL_NODE_ID .................................................... 7-82 SDO_NET_MEM.NODE.GET_GEOM_ID ........................................................................... 7-83 SDO_NET_MEM.NODE.GET_GEOMETRY ....................................................................... 7-84 SDO_NET_MEM.NODE.GET_HIERARCHY_LEVEL....................................................... 7-85 SDO_NET_MEM.NODE.GET_IN_LINK_IDS..................................................................... 7-86 SDO_NET_MEM.NODE.GET_INCIDENT_LINK_IDS ..................................................... 7-87 SDO_NET_MEM.NODE.GET_MEASURE .......................................................................... 7-88 SDO_NET_MEM.NODE.GET_NAME ................................................................................. 7-89 SDO_NET_MEM.NODE.GET_OUT_LINK_IDS................................................................. 7-90 SDO_NET_MEM.NODE.GET_PARENT_NODE_ID ......................................................... 7-91 SDO_NET_MEM.NODE.GET_PARTITION_ID ................................................................. 7-92 SDO_NET_MEM.NODE.GET_SIBLING_NODE_IDS ....................................................... 7-93 SDO_NET_MEM.NODE.GET_STATE ................................................................................. 7-94 SDO_NET_MEM.NODE.GET_TYPE .................................................................................... 7-95 SDO_NET_MEM.NODE.IS_ACTIVE ................................................................................... 7-96 SDO_NET_MEM.NODE.IS_EXTERNAL_NODE............................................................... 7-97 SDO_NET_MEM.NODE.IS_LOGICAL ................................................................................ 7-98 SDO_NET_MEM.NODE.IS_TEMPORARY ......................................................................... 7-99 SDO_NET_MEM.NODE.LINK_EXISTS............................................................................. 7-100 SDO_NET_MEM.NODE.MAKE_TEMPORARY .............................................................. 7-101 SDO_NET_MEM.NODE.SET_COMPONENT_NO.......................................................... 7-102 SDO_NET_MEM.NODE.SET_COST .................................................................................. 7-103 SDO_NET_MEM.NODE.SET_EXTERNAL_NETWORK_ID .......................................... 7-104 SDO_NET_MEM.NODE.SET_EXTERNAL_NODE_ID................................................... 7-105 SDO_NET_MEM.NODE.SET_GEOM_ID .......................................................................... 7-106 SDO_NET_MEM.NODE.SET_GEOMETRY ...................................................................... 7-107 SDO_NET_MEM.NODE.SET_HIERARCHY_LEVEL...................................................... 7-108 x SDO_NET_MEM.NODE.SET_MEASURE ......................................................................... 7-109 SDO_NET_MEM.NODE.SET_NAME ................................................................................ 7-110 SDO_NET_MEM.NODE.SET_PARENT_NODE .............................................................. 7-111 SDO_NET_MEM.NODE.SET_STATE ................................................................................ 7-112 SDO_NET_MEM.NODE.SET_TYPE ................................................................................... 7-113 SDO_NET_MEM.PATH.COMPUTE_GEOMETRY.......................................................... 7-114 SDO_NET_MEM.PATH.GET_COST .................................................................................. 7-115 SDO_NET_MEM.PATH.GET_END_NODE_ID ............................................................... 7-116 SDO_NET_MEM.PATH.GET_GEOMETRY ...................................................................... 7-117 SDO_NET_MEM.PATH.GET_LINK_IDS .......................................................................... 7-118 SDO_NET_MEM.PATH.GET_NAME ................................................................................ 7-119 SDO_NET_MEM.PATH.GET_NO_OF_LINKS................................................................. 7-120 SDO_NET_MEM.PATH.GET_NODE_IDS ........................................................................ 7-121 SDO_NET_MEM.PATH.GET_START_NODE_ID ........................................................... 7-122 SDO_NET_MEM.PATH.GET_TYPE................................................................................... 7-123 SDO_NET_MEM.PATH.IS_ACTIVE .................................................................................. 7-124 SDO_NET_MEM.PATH.IS_CLOSED ................................................................................. 7-125 SDO_NET_MEM.PATH.IS_CONNECTED ....................................................................... 7-126 SDO_NET_MEM.PATH.IS_LOGICAL............................................................................... 7-127 SDO_NET_MEM.PATH.IS_SIMPLE................................................................................... 7-128 SDO_NET_MEM.PATH.IS_TEMPORARY........................................................................ 7-129 SDO_NET_MEM.PATH.SET_GEOMETRY ....................................................................... 7-130 SDO_NET_MEM.PATH.SET_NAME ................................................................................. 7-131 SDO_NET_MEM.PATH.SET_PATH_ID............................................................................ 7-132 SDO_NET_MEM.PATH.SET_TYPE.................................................................................... 7-133 Index xi List of Examples 1–1 1–2 1–3 1–4 1–5 1–6 1–7 1–8 1–9 1–10 1–11 1–12 1–13 5–1 5–2 5–3 5–4 5–5 xii Loading the Feature Table for a Collection Layer.................................................................. 1-8 Modeling a Topology Geometry Layer Hierarchy ............................................................. 1-11 SDO_TOPO_GEOMETRY Attributes in Queries ................................................................ 1-20 INSERT Using Constructor with SDO_TOPO_OBJECT_ARRAY .................................... 1-21 INSERT Using Constructor with SDO_TGL_OBJECT_ARRAY ....................................... 1-22 UPDATE Using Constructor with SDO_TOPO_OBJECT_ARRAY.................................. 1-23 UPDATE Using Constructor with SDO_TGL_OBJECT_ARRAY..................................... 1-24 GET_GEOMETRY Member Function ................................................................................... 1-25 GET_TGL_OBJECTS Member Function ............................................................................... 1-25 GET_TOPO_ELEMENTS Member Function ....................................................................... 1-25 Topology Operators................................................................................................................. 1-30 Topology Built from Topology Data ..................................................................................... 1-34 Topology Built from Spatial Geometries .............................................................................. 1-44 Using a Network Memory Object for Editing and Analysis (PL/SQL).............................. 5-9 Simple Spatial (SDO) Network Example (PL/SQL) ........................................................... 5-27 Simple Logical Network Example (PL/SQL) ...................................................................... 5-29 Spatial (LRS) Network Example (PL/SQL) ......................................................................... 5-31 Logical Network Example (PL/SQL) ................................................................................... 5-46 List of Figures 1–1 1–2 1–3 1–4 1–5 1–6 2–1 2–2 2–3 2–4 2–5 2–6 2–7 2–8 2–9 2–10 2–11 2–12 2–13 4–1 5–1 5–2 5–3 5–4 5–5 5–6 5–7 Simplified Topology ................................................................................................................... 1-5 Simplified Topology, with Grid Lines and Unit Numbers................................................... 1-6 Features in a Topology ............................................................................................................... 1-7 Topology Geometry Layer Hierarchy................................................................................... 1-11 Mapping Between Feature Tables and Topology Tables ................................................... 1-13 Nodes, Edges, and Faces......................................................................................................... 1-15 Editing Topologies Using the TopoMap Object Cache (PL/SQL API)............................... 2-4 Editing Topologies Using the TopoMap Object Cache (Java API) ...................................... 2-6 Adding a Non-Isolated Node.................................................................................................... 2-9 Effect of is_new_shape_point Value on Adding a Node ................................................... 2-10 Topology Before Moving a Non-Isolated Node .................................................................. 2-11 Topology After Moving a Non-Isolated Node .................................................................... 2-11 Node Move Is Not Allowed ................................................................................................... 2-12 Topology for Node Movement Examples ............................................................................ 2-12 Removing a Non-Isolated Node ............................................................................................ 2-13 Removing Obsolete Nodes ..................................................................................................... 2-15 Adding a Non-Isolated Edge ................................................................................................. 2-16 Moving a Non-Isolated Edge ................................................................................................. 2-17 Removing a Non-Isolated Edge ............................................................................................. 2-18 Loading Topological Elements into a Window ................................................................... 4-59 New York City Nodes and Links.............................................................................................. 5-2 Network Hierarchy..................................................................................................................... 5-8 Java Classes and Interfaces for Network Data Model ........................................................ 5-20 Simple Spatial (SDO) Network .............................................................................................. 5-27 Simple Logical Network ......................................................................................................... 5-29 Roads and Road Segments for Spatial (LRS) Network Example...................................... 5-30 Nodes and Links for Logical Network Example................................................................. 5-46 xiii List of Tables 1–1 1–2 1–3 1–4 1–5 1–6 1–7 1–8 1–9 5–1 5–2 5–3 5–4 5–5 5–6 xiv Columns in the_EDGE$ Table.............................................................. Edge Table ID Column Values.............................................................................................. Columns in the _NODE$ Table............................................................. Columns in the _FACE$ Table .............................................................. Columns in the _RELATION$ Table.................................................... Columns in the _HISTORY$ Table ....................................................... SDO_TOPO_GEOMETRY Type Attributes ........................................................................ Columns in the xxx_SDO_TOPO_INFO Views.................................................................. Columns in the xxx_SDO_TOPO_METADATA Views .................................................... Node Table Columns.............................................................................................................. Link Table Columns ............................................................................................................... Path Table Columns................................................................................................................ Path-Link Table Columns ...................................................................................................... Columns in the xxx_SDO_NETWORK_METADATA Views .......................................... Columns in the xxx_SDO_NETWORK_CONSTRAINTS Views ..................................... 1-14 1-15 1-16 1-16 1-17 1-17 1-20 1-26 1-27 5-11 5-12 5-13 5-14 5-14 5-16 Preface Oracle Spatial Topology and Network Data Models provides usage and reference information about the topology data model and network data model of Oracle Spatial, which is often referred to as just Spatial. Audience This guide is intended for those who need to use the Spatial topology or network data model to work with data about nodes, edges, and faces in a topology or nodes, links, and paths in a network. You are assumed to be familiar with the main Spatial concepts, data types, and operations, as documented in Oracle Spatial User's Guide and Reference. Documentation Accessibility Our goal is to make Oracle products, services, and supporting documentation accessible, with good usability, to the disabled community. To that end, our documentation includes features that make information available to users of assistive technology. This documentation is available in HTML format, and contains markup to facilitate access by the disabled community. Accessibility standards will continue to evolve over time, and Oracle is actively engaged with other market-leading technology vendors to address technical obstacles so that our documentation can be accessible to all of our customers. For more information, visit the Oracle Accessibility Program Web site at http://www.oracle.com/accessibility/ Accessibility of Code Examples in Documentation Screen readers may not always correctly read the code examples in this document. The conventions for writing code require that closing braces should appear on an otherwise empty line; however, some screen readers may not always read a line of text that consists solely of a bracket or brace. Accessibility of Links to External Web Sites in Documentation This documentation may contain links to Web sites of other companies or organizations that Oracle does not own or control. Oracle neither evaluates nor makes any representations regarding the accessibility of these Web sites. xv TTY Access to Oracle Support Services Oracle provides dedicated Text Telephone (TTY) access to Oracle Support Services within the United States of America 24 hours a day, seven days a week. For TTY support, call 800.446.2398. Related Documents For more information, see Oracle Spatial User's Guide and Reference. Oracle error message documentation is only available in HTML. If you only have access to the Oracle Documentation CD, you can browse the error messages by range. Once you find the specific range, use your browser's "find in page" feature to locate the specific message. When connected to the Internet, you can search for a specific error message using the error message search feature of the Oracle online documentation. Printed documentation is available for sale in the Oracle Store at http://oraclestore.oracle.com/ To download free release notes, installation documentation, white papers, or other collateral, go to the Oracle Technology Network (OTN). You must register online before using OTN; registration is free and can be done at http://www.oracle.com/technology/membership If you already have a user name and password for OTN, then you can go directly to the documentation section of the OTN Web site at http://www.oracle.com/technology/documentation Conventions The following text conventions are used in this document: xvi Convention Meaning boldface Boldface type indicates graphical user interface elements associated with an action, or terms defined in text or the glossary. italic Italic type indicates book titles, emphasis, or placeholder variables for which you supply particular values. monospace Monospace type indicates commands within a paragraph, URLs, code in examples, text that appears on the screen, or text that you enter. What’s New in the Topology and Network Data Models? This section describes new and changed features of the Oracle Spatial topology and network data models for the current release. New SDO_TOPO_MAP Subprograms The SDO_TOPO_MAP package (described in Chapter 4) contains the following new subprograms and major changes to existing subprograms: ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ SDO_TOPO_MAP.ADD_LINEAR_GEOMETRY adds one or more edges representing a specified linear geometry, and returns the edge ID of each added edge. SDO_TOPO_MAP.ADD_POINT_GEOMETRY adds a node representing a specified point geometry or coordinate pair, and returns the node ID of the added edge. SDO_TOPO_MAP.ADD_POLYGON_GEOMETRY adds one or more faces representing a specified polygon geometry, and returns the face ID of each added face. SDO_TOPO_MAP.CREATE_FEATURE creates a feature from Oracle Spatial geometries. It is intended to be used for inserting rows into a feature table. SDO_TOPO_MAP.GET_NEAREST_EDGE_IN_CACHE returns the edge ID number of the edge that, of the edges loaded in the specified TopoMap object, is nearest (closest to) the specified point. SDO_TOPO_MAP.GET_NEAREST_NODE_IN_CACHE returns the node ID number of the node that, of the nodes loaded in the specified TopoMap object, is nearest (closest to) the specified point. SDO_TOPO_MAP.GET_FACE_BOUNDARYreturns an array with the edge ID numbers of the edges that make up the boundary for the specified face. SDO_TOPO_MAP.GET_NODE_FACE_STAR returns an SDO_NUMBER_ARRAY object with the face ID numbers, in clockwise order, of the faces that are connected to the specified node. SDO_TOPO_MAP.GET_TOPO_TRANSACTION_ID returns the topology transaction ID number, if data has been loaded into the current updatable TopoMap object. SDO_TOPO_MAP.LOAD_TOPO_MAP, which was available as a function in the previous release, is now also available as a procedure. Using a procedure format xvii for loading the TopoMap object is more efficient than using the function format, if you do not need to know if any topological elements were loaded (for example, if the specified topology or rectangular area is empty). Using a function format lets you know if any topological elements were loaded. ■ ■ ■ ■ SDO_TOPO_MAP.REMOVE_OBSOLETE_NODES removes the obsolete nodes in a topology. Obsolete nodes are explained in Section 2.2.4. SDO_TOPO_MAP.SEARCH_EDGE_RTREE_TOPO_MAP returns an array with the edge ID numbers of the edges that interact with a specified query window. The query window is computed using the edge R-tree built on the specified TopoMap object. SDO_TOPO_MAP.SEARCH_FACE_RTREE_TOPO_MAP returns an array with the face ID numbers of the faces that interact with a specified query window. The query window is computed using the face R-tree built on the specified TopoMap object. SDO_TOPO_MAP.SET_MAX_MEMORY_SIZE sets the Java maximum heap size for an application to run in an Oracle Java virtual machine. Additional Topology Operators Support is provided for topology operators in addition to SDO_ANYINTERACT, as explained in Section 1.8.1. New GET_TGL_OBJECTS Member Function The SDO_TOPO_GEOMETRY type has a member function GET_TGL_OBJECTS, which you can use to return the SDO_TOPO_OBJECT_ARRAY object for a topology geometry object in a geometry layer with a hierarchy level greater than 0 (zero) in a topology with a topology geometry layer hierarchy. For more information, see Section 1.6.4. Collection Layers A collection layer is a topology geometry layer that can contain topological elements of different topology geometry types. For example, using the sample CITY_DATA topology, you could create a collection layer to contain specific land parcel, city street, and traffic sign elements. Collection layers are explained in Section 1.3.2. Features Built from Topological Elements in Parent Layers In a topology with a topology geometry layer hierarchy, within each level above level 0, each layer can now contain features built from topological elements (faces, nodes, edges) in addition to (or instead of) features built from features at the next lower level. For example, a tracts layer can contain tracts built from block groups or tracts built from faces, or both. For more information, see Section 1.4. For information about SDO_ TOPO_GEOMETRY constructor formats and options in dealing with topology geometry layer hierarchies, see Section 1.6.2. xviii New Format for Topology Operators and SDO_TOPO.RELATE Function The topology operators now support an additional format: a topology geometry object (type SDO_TOPO_GEOMETRY) as the first parameter and a topology object array (type SDO_TOPO_OBJECT_ARRAY) as the second parameter. Topology operators are described in Section 1.8.1. The format with a topology geometry object as the first parameter and a topology object array as the second parameter is also now supported for the SDO_ TOPO.RELATE function, which is documented in Chapter 3. Simplified Process for Exporting and Importing Topologies The process for exporting a topology and importing the topology into a target database has been simplified. This process is explained in Section 1.9. Two new procedures support the exporting and importing of topologies: SDO_ TOPO.PREPARE_FOR_EXPORT and SDO_TOPO.INITIALIZE_AFTER_IMPORT. These procedures are documented in Chapter 3. SDO_NET_MEM Package for Network Editing and Analysis The network data model includes the new SDO_NET_MEM package, which enables you to use a network memory object to perform network editing and analysis. This PL/SQL package implements capabilities that have been available, and continue to be available, using the network data model Java application programming interface (API). For information about using SDO_NET_MEM subprograms and network memory objects, see Section 5.7 and Section 5.10.1. For reference information about the SDO_NET_MEM subprograms, see Chapter 7. Bidirected Links Within a directed network, any link can be bidirected (that is, able to be traversed either from the start node to the end node or from the end node to the start node) or unidirected (that is, able to be traversed only from the start node to the end node). To indicate whether a link is bidirected, the link table now contains a column named BIDIRECTED. (Link concepts are explained in Section 5.3, and the link table is explained in Section 5.8.2.) Cost Computation by a PL/SQL Function The NODE_COST_COLUMN and LINK_COST_COLUMN columns in the USER_ SDO_NETWORK_METADATA and ALL_SDO_NETWORK_METADATA views can now specify a PL/SQL function to compute the cost value, instead of the name of the column that contains the cost value. (These views are explained in Section 5.9.1.) xix xx Part I Topology Data Model This document has two main parts: ■ ■ Part I provides conceptual, usage, and reference information about the topology data model of Oracle Spatial. Part II provides conceptual, usage, and reference information about the network data model of Oracle Spatial. Much of the conceptual information in Part I also applies to the network data model. Therefore, if you develop network applications, you should be familiar with the main terms and concepts from both parts of this document. Part I contains the following chapters: ■ Chapter 1, "Topology Data Model Overview" ■ Chapter 2, "Editing Topologies" ■ Chapter 3, "SDO_TOPO Package Subprograms" ■ Chapter 4, "SDO_TOPO_MAP Package Subprograms" 1 Topology Data Model Overview The topology data model of Oracle Spatial lets you work with data about nodes, edges, and faces in a topology. For example, United States Census geographic data is provided in terms of nodes, chains, and polygons, and this data can be represented using the Spatial topology data model. You can store information about topological elements and geometry layers in Oracle Spatial tables and metadata views. You can then perform certain Spatial operations referencing the topological elements, for example, finding which chains (such as streets) have any spatial interaction with a specific polygon entity (such as a park). This chapter describes the Spatial data structures and data types that support the topology data model, and what you need to do to populate and manipulate the structures. You can use this information to write a program to convert your topological data into formats usable with Spatial. Although this chapter discusses some topology terms as they relate to Oracle Spatial, it assumes that you are familiar with basic topology concepts. Note: It also assumes that you are familiar with the main Spatial concepts, data types, and operations, as documented in Oracle Spatial User's Guide and Reference. This chapter contains the following major sections: ■ Section 1.1, "Main Steps in Using Topology Data" ■ Section 1.2, "Topology Data Model Concepts" ■ Section 1.3, "Topology Geometries and Layers" ■ Section 1.4, "Topology Geometry Layer Hierarchy" ■ Section 1.5, "Topology Data Model Tables" ■ Section 1.6, "Topology Data Types" ■ Section 1.7, "Topology Metadata Views" ■ Section 1.8, "Topology Application Programming Interface" ■ Section 1.9, "Exporting and Importing Topology Data" ■ Section 1.10, "Cross-Schema Usage and Editing Considerations" ■ Section 1.11, "Function-Based Indexes Not Supported" ■ Section 1.12, "Topology Examples (PL/SQL)" Topology Data Model Overview 1-1 Main Steps in Using Topology Data ■ Section 1.13, "README File for Spatial and Related Features" 1.1 Main Steps in Using Topology Data This section summarizes the main steps for working with topology data in Oracle Spatial. It refers to important concepts, structures, and operations that are described in detail in other sections. The specific main steps depend on which of two basic approaches you follow, which depend on the kind of data you will use to build the topology: ■ ■ If you have data about the edges, nodes, and faces (but not spatial geometry data), follow the steps in Section 1.1.1, "Using a Topology Built from Topology Data". If you will build the topology from Spatial geometries that will become topology features, follow the steps in Section 1.1.2, "Using a Topology Built from Spatial Geometries". You can use the topology data model PL/SQL and Java APIs to update the topology (for example, to change the data about an edge, node, or face). The PL/SQL API for most editing operations is the SDO_TOPO_MAP package, which is documented in Chapter 4. The Java API is described in Section 1.8.2. 1.1.1 Using a Topology Built from Topology Data The main steps for working with a topology built from topology data are as follows: 1. Create the topology, using the SDO_TOPO.CREATE_TOPOLOGY procedure. This causes the _EDGE$, _NODE$, _FACE$, and _HISTORY$ tables to be created. (These tables are described in Section 1.5.1, Section 1.5.2, Section 1.5.3, and Section 1.5.5, respectively.) 2. Load topology data into the node, edge, and face tables created in Step 1. This is typically done using a bulk-load utility, but it can be done using SQL INSERT statements. 3. Create a feature table for each type of topology geometry layer in the topology. For example, a city data topology might have separate feature tables for land parcels, streets, and traffic signs. 4. Associate the feature tables with the topology, using the SDO_TOPO.ADD_TOPO_ GEOMETRY_LAYER procedure for each feature table. This causes the _RELATION$ table to be created. (This table is described in Section 1.5.4.) 5. Initialize topology metadata, using the SDO_TOPO.INITIALIZE_METADATA procedure. (This procedure also creates spatial indexes on the _ EDGE$, _NODE$, and _FACE$ tables, and additional B-tree indexes on the _EDGE$ and _NODE$ tables.) 6. Load the feature tables using the SDO_TOPO_GEOMETRY constructor. (This constructor is described in Section 1.6.2.) 7. Query the topology data (for example, using one of topology operators described in Section 1.8.1). 8. Optionally, edit topology data using the PL/SQL or Java application programming interfaces (APIs). 1-2 Oracle Spatial Topology and Network Data Models Topology Data Model Concepts Section 1.12.1 contains a PL/SQL example that performs these main steps. 1.1.2 Using a Topology Built from Spatial Geometries To build a topology from spatial geometries, you must first perform the standard operations for preparing data for use with Oracle Spatial, as described in Oracle Spatial User's Guide and Reference: 1. Create the spatial tables. 2. Update the spatial metadata (USER_SDO_GEOM_METADATA view). 3. Load data into the spatial tables. 4. Validate the spatial data. 5. Create the spatial indexes. The main steps for working with a topology built from Oracle Spatial geometries are as follows: 1. Create the topology, using the SDO_TOPO.CREATE_TOPOLOGY procedure. This causes the _EDGE$, _NODE$, _FACE$, and _HISTORY$ tables to be created. (These tables are described in Section 1.5.1, Section 1.5.2, Section 1.5.3, and Section 1.5.5, respectively.) 2. Create the universe face (F0, defined in Section 1.2). 3. Create a feature table for each type of topology geometry layer in the topology. For example, a city data topology might have separate feature tables for land parcels, streets, and traffic signs. 4. Associate the feature tables with the topology, using the SDO_TOPO.ADD_TOPO_ GEOMETRY_LAYER procedure for each feature table. This causes the _RELATION$ table to be created. (This table is described in Section 1.5.4.) 5. Create a TopoMap object and load the whole topology into cache. 6. Load the feature tables, inserting data from the spatial tables and using the SDO_ TOPO_MAP.CREATE_FEATURE function. 7. Initialize topology metadata, using the SDO_TOPO.INITIALIZE_METADATA procedure. (This procedure also creates spatial indexes on the _ EDGE$, _NODE$, and _FACE$ tables, and additional B-tree indexes on the _EDGE$ and _NODE$ tables.) 8. Query the topology data (using one of topology operators described in Section 1.8.1). 9. Optionally, edit topology data using the PL/SQL or Java application programming interfaces (APIs). Section 1.12.2 contains a PL/SQL example that performs these main steps. 1.2 Topology Data Model Concepts Topology is a branch of mathematics concerned with objects in space. Topological relationships include such relationships as contains, inside, covers, covered by, touch, and overlap with boundaries intersecting. Topological relationships remain constant when the Topology Data Model Overview 1-3 Topology Data Model Concepts coordinate space is deformed, such as by twisting or stretching. (Examples of relationships that are not topological include length of, distance between, and area of.) The basic elements in a topology are its nodes, edges, and faces. A node, represented by a point, can be isolated or it can be used to bound edges. Two or more edges meet at a non-isolated node. A node has a coordinate pair associated with it that describes the spatial location for that node. Examples of geographic entities that might be represented as nodes include start and end points of streets, places of historical interest, and airports (if the map scale is sufficiently large). An edge is bounded by two nodes: the start (origin) node and the end (terminal) node. An edge has an associated geometric object, usually a coordinate string that describes the spatial representation of the edge. An edge may have several vertices making up a line string. (Circular arcs are not supported for topologies.) Examples of geographic entities that might be represented as edges include segments of streets and rivers. The order of the coordinates gives a direction to an edge, and direction is important in determining topological relationships. The positive direction agrees with the orientation of the underlying edge, and the negative direction reverses this orientation. Each orientation of an edge is referred to as a directed edge, and each directed edge is the mirror image of its other directed edge. The start node of the positive directed edge is the end node of the negative directed edge. An edge also lies between two faces and has references to both of them. Each directed edge contains a reference to the next edge in the contiguous perimeter of the face on its left side. A face, corresponding to a polygon, has a reference to one directed edge of its outer boundary. If any island nodes or island edges are present, the face also has a reference to one directed edge on the boundary of each island. Examples of geographic entities that might be represented as faces include parks, lakes, counties, and states. Figure 1–1 shows a simplified topology containing nodes, edges, and faces. The arrowheads on each edge indicate the positive direction of the edge (or, more precisely, the orientation of the underlying line string or curve geometry for positive direction of the edge). 1-4 Oracle Spatial Topology and Network Data Models Topology Data Model Concepts Figure 1–1 Simplified Topology E5 E2 N7 N5 E1 N21 E26 F9 N20 N22 E25 N3 N4 F2 E4 E3 N6 F1 N1 N2 F0 E6 N16 E21 E7 N18 N17 E19 F3 E22 E20 F7 E11 N12 E18 F8 E16 E14 E13 N9 E15 F5 N13 E12 N8 E17 F4 N14 F6 N19 E10 E9 N15 E8 N10 N11 Notes on Figure 1–1: ■ ■ ■ ■ ■ ■ ■ ■ E elements (E1, E2, and so on) are edges, F elements (F0, F1, and so on) are faces, and N elements (N1, N2, and so on) are nodes. F0 (face zero) is created for every topology. It is the universe face containing everything else in the topology. There is no geometry associated with the universe face. F0 has the face ID value of -1 (negative 1). There is a node created for every point geometry and for every start and end node of an edge. For example, face F1 has only an edge (a closed edge), E1, that has the same node as the start and end nodes (N1). F1 also has edge E2, with start node N21 and end node N22. An isolated node (also called an island node) is a node that is isolated in a face. For example, node N4 is an isolated node in face F2. An isolated edge (also called an island edge) is an edge that is isolated in a face. For example, edge E25 is an isolated edge in face F1. A loop edge is an edge that has the same node as its start node and end node. For example, edge E1 is a loop edge starting and ending at node N1. An edge cannot have an isolated (island) node on it. The edge can be broken up into two edges by adding a node on the edge. For example, if there was originally a single edge between nodes N16 and N18, adding node N17 resulted in two edges: E6 and E7. Information about the topological relationships is stored in special edge, face, and node information tables. For example, the edge information table contains the following information about edges E9 and E10. (Note the direction of the Topology Data Model Overview 1-5 Topology Geometries and Layers arrowheads for each edge.) The next and previous edges are based on the left and right faces of the edge. For edge E9, the start node is N15 and the end node is N14, the next left edge is E19 and the previous left edge is -E21, the next right edge is -E22 and the previous right edge is E20, the left face is F3 and the right face is F6. For edge E10, the start node is N13 and the end node is N14, the next left edge is -E20 and the previous left edge is E18, the next right edge is E17 and the previous right edge is -E19, the left face is F7 and the right face is F4. For additional examples of edge-related data, including an illustration and explanations, see Section 1.5.1. Figure 1–2 shows the same topology illustrated in Figure 1–1, but it adds a grid and unit numbers along the x-axis and y-axis. Figure 1–2 is useful for understanding the output of some of the examples in Chapter 3 and Chapter 4. 45 Figure 1–2 Simplified Topology, with Grid Lines and Unit Numbers E5 40 E2 N7 N5 E1 35 N21 30 E26 F9 N20 N22 N3 N4 E25 F2 25 N2 F0 E6 20 N16 15 E21 E7 N17 F3 E22 F4 E19 N19 E17 E10 F6 E11 F7 E20 E12 E15 F5 N13 N14 N12 E18 E13 F8 E16 E14 N9 N10 N11 0 N8 E8 N18 E9 N15 10 N6 F1 N1 5 E4 E3 0 5 10 15 20 25 30 35 40 45 50 55 60 65 1.3 Topology Geometries and Layers A topology geometry (also referred to as a feature) is a spatial representation of a real world object. For example, Main Street and Walden State Park might be the names of topology geometries. The geometry is stored as a set of topological elements (nodes, edges, and faces), which are sometimes also referred to as primitives. Each topology 1-6 Oracle Spatial Topology and Network Data Models Topology Geometries and Layers geometry has a unique ID (assigned by Spatial when records are imported or loaded) associated with it. A topology geometry layer consists of topology geometries, usually of a specific topology geometry type, although it can be a collection of multiple types (see Section 1.3.2 for information about collection layers). For example, Streets might be the topology geometry layer that includes the Main Street topology geometry, and State Parks might be the topology geometry layer that includes the Walden State Park topology geometry. Each topology geometry layer has a unique ID (assigned by Spatial) associated with it. The data for each topology geometry layer is stored in a feature table. For example, a feature table named CITY_STREETS might contain information about all topology geometries (individual roads or streets) in the Streets topology geometry layer. Each topology geometry (feature) is defined as an object of type SDO_TOPO_ GEOMETRY (described in Section 1.6.1), which identifies the topology geometry type, topology geometry ID, topology geometry layer ID, and topology ID for the topology. Topology metadata is automatically maintained by Spatial in the USER_SDO_TOPO_ METADATA and ALL_SDO_TOPO_METADATA views, which are described in Section 1.7.2. The USER_SDO_TOPO_INFO and ALL_SDO_TOPO_INFO views (described in Section 1.7.1) contain a subset of this topology metadata. 1.3.1 Features Often, there are fewer features in a topology than there are topological elements (nodes, edges, and faces). For example, a road feature may consist of many edges, an area feature such as a park may consist of many faces, and some nodes may not be associated with point features. Figure 1–3 shows point, line, and area features associated with the topology that was shown in Figure 1–1 in Section 1.2. Figure 1–3 Features in a Topology P4 P5 R3 S4 R2 R4 S3 R1 S2 S1 P1 P2 P3 Figure 1–3 shows the following kinds of features in the topology: Topology Data Model Overview 1-7 Topology Geometries and Layers ■ Point features (traffic signs), shown as dark circles: S1, S2, S3, and S4 ■ Linear features (roads or streets), shown as dashed lines: R1, R2, R3, and R4 ■ Area features (land parcels), shown as rectangles: P1, P2, P3, P4, and P5 Land parcel P5 does not include the shaded area within its area. (Specifically, P5 includes face F1 but not face F9. These faces are shown in Figure 1–1 in Section 1.2.) Example 1–12 in Section 1.12.1 defines these features. 1.3.2 Collection Layers A collection layer is a topology geometry layer that can contain topological elements of different topology geometry types. For example, using the CITY_DATA topology from the examples in Section 1.12, you could create a collection layer to contain specific land parcel, city street, and traffic sign elements. To create a collection layer, follow essentially the same steps for creating other types of layers. Create a feature table for the layer, as in the following example: CREATE TABLE collected_features ( -- Selected heterogeneous features feature_name VARCHAR2(30) PRIMARY KEY, feature SDO_TOPO_GEOMETRY); Associate the feature table with the topology, specifying COLLECTION for the topo_ geometry_layer_type parameter in the call to the SDO_TOPO.ADD_TOPO_ GEOMETRY_LAYER procedure, as in the following example: EXECUTE SDO_TOPO.ADD_TOPO_GEOMETRY_LAYER('CITY_DATA', COLLECTED_FEATURES', 'FEATURE', 'COLLECTION'); To load the feature table for the collection layer, insert the necessary rows, as shown in Example 1–1. Example 1–1 Loading the Feature Table for a Collection Layer -- Take R5 from the CITY_STREETS layer. INSERT INTO collected_features VALUES( 'C_R5', SDO_TOPO_GEOMETRY('CITY_DATA', 2, -- tg_type = line/multiline 4, -- tg_layer_id SDO_TOPO_OBJECT_ARRAY( SDO_TOPO_OBJECT(20, 2), SDO_TOPO_OBJECT(-9, 2))) ); -- Take S3 from the TRAFFIC_SIGNS layer. INSERT INTO collected_features VALUES( 'C_S3', SDO_TOPO_GEOMETRY('CITY_DATA', 1, -- tg_type = point/multipoint 4, -- topo layer id SDO_TOPO_OBJECT_ARRAY( SDO_TOPO_OBJECT(6, 1))) ); -- Take P3 from the LAND_PARCELS layer. INSERT INTO collected_features VALUES( 'C_P3', 1-8 Oracle Spatial Topology and Network Data Models Topology Geometry Layer Hierarchy SDO_TOPO_GEOMETRY('CITY_DATA', 3, -- tg_type = (multi)polygon 4, SDO_TOPO_OBJECT_ARRAY( SDO_TOPO_OBJECT(5, 3), SDO_TOPO_OBJECT(8, 3))) ); -- Create a collection from a polygon and a point. INSERT INTO collected_features VALUES( 'C1', SDO_TOPO_GEOMETRY('CITY_DATA', 4, -- tg_type = collection 4, SDO_TOPO_OBJECT_ARRAY( SDO_TOPO_OBJECT(5, 3), SDO_TOPO_OBJECT(6, 1))) ); -- Create a collection from a polygon and a line. INSERT INTO collected_features VALUES( 'C2', SDO_TOPO_GEOMETRY('CITY_DATA', 4, -- tg_type = collection 4, SDO_TOPO_OBJECT_ARRAY( SDO_TOPO_OBJECT(8, 3), SDO_TOPO_OBJECT(10, 2))) ); -- Create a collection from a line and a point. INSERT INTO collected_features VALUES( 'C3', SDO_TOPO_GEOMETRY('CITY_DATA', 4, -- tg_type = collection 4, SDO_TOPO_OBJECT_ARRAY( SDO_TOPO_OBJECT(-5, 2), SDO_TOPO_OBJECT(10, 1))) ); 1.4 Topology Geometry Layer Hierarchy In some topologies, the topology geometry layers (feature layers) have one or more parent-child relationships in a topology hierarchy. That is, the layer at the topmost level consists of features in its child layer at the next level down in the hierarchy; the child layer might consist of features in its child layer at the next layer farther down; and so on. For example, a land use topology might have the following topology geometry layers at different levels of hierarchy: ■ ■ ■ ■ States at the highest level, which consists of features from its child layer, Counties Counties at the next level down, which consists of features from its child layer, Tracts Tracts at the next level down, which consists of features from its child layer, Block Groups Block Groups at the next level down, which consists of features from its child layer, Land Parcels Topology Data Model Overview 1-9 Topology Geometry Layer Hierarchy ■ Land Parcels at the lowest level of the hierarchy If the topology geometry layers in a topology have this hierarchical relationship, it is far more efficient if you model the layers as hierarchical than if you specify all topology geometry layers at a single level (that is, with no hierarchy). For example, it is more efficient to construct SDO_TOPO_GEOMETRY objects for counties by specifying only the tracts in the county than by specifying all land parcels in all block groups in all tracts in the county. The lowest level (for the topology geometry layer containing the smallest kinds of features) in a hierarchy is level 0, and successive higher levels are numbered 1, 2, and so on. Topology geometry layers at adjacent levels of a hierarchy have a parent-child relationship. Each topology geometry layer at the higher level is the parent layer for one layer at the lower level, which is its child layer. A parent layer can have only one child layer, but a child layer can have one or more parent layers. Using the preceding example, the Counties layer can have only one child layer, Tracts; however, the Tracts layer could have parent layers named Counties and Water Districts. Topology geometry layer hierarchy is somewhat similar to network hierarchy, which is described in Section 5.5; however, there are significant differences, and you should not confuse the two. For example, the lowest topology geometry layer hierarchy level is 0, and the lowest network hierarchy level is 1; and in a topology geometry layer hierarchy each parent must have one child and each child can have many parents, while in a network hierarchy each parent can have many children and each child must have one parent. Note: Figure 1–4 shows the preceding example topology geometry layer hierarchy. Each level of the hierarchy shows the level number and the topology geometry layer in that level. 1-10 Oracle Spatial Topology and Network Data Models Topology Geometry Layer Hierarchy Figure 1–4 Topology Geometry Layer Hierarchy Level 4 States Level 3 Counties Level 2 Tracts Level 1 Block Groups Level 0 Land Parcels To model topology geometry layers as hierarchical, specify the child layer in the child_layer_id parameter when you call the SDO_TOPO.ADD_TOPO_ GEOMETRY_LAYER procedure to add a parent topology geometry layer to the topology. Add the lowest-level (level 0) topology geometry layer first; then add the level 1 layer, specifying the level 0 layer as its child; then add the level 2 layer, specifying the level 1 layer as its child; and so on. Example 1–2 shows five topology geometry layers being added so that the 5-level hierarchy is established. Example 1–2 Modeling a Topology Geometry Layer Hierarchy -- Create the topology. (Null SRID in this example.) EXECUTE SDO_TOPO.CREATE_TOPOLOGY('LAND_USE_HIER', 0.00005); -- Create feature tables. CREATE TABLE land_parcels ( -- Land parcels (selected faces) feature_name VARCHAR2(30) PRIMARY KEY, feature SDO_TOPO_GEOMETRY); CREATE TABLE block_groups ( feature_name VARCHAR2(30) PRIMARY KEY, feature SDO_TOPO_GEOMETRY); CREATE TABLE tracts ( feature_name VARCHAR2(30) PRIMARY KEY, feature SDO_TOPO_GEOMETRY); CREATE TABLE counties ( feature_name VARCHAR2(30) PRIMARY KEY, feature SDO_TOPO_GEOMETRY); Topology Data Model Overview 1-11 Topology Geometry Layer Hierarchy CREATE TABLE states ( feature_name VARCHAR2(30) PRIMARY KEY, feature SDO_TOPO_GEOMETRY); -- (Other steps not shown here, such as populating the feature tables -- and initializing the metadata.) . . . -- Associate feature tables with the topology; include hierarchy information. DECLARE land_parcels_id NUMBER; block_groups_id NUMBER; tracts_id NUMBER; counties_id NUMBER; BEGIN SDO_TOPO.ADD_TOPO_GEOMETRY_LAYER('LAND_USE_HIER', 'LAND_PARCELS', 'FEATURE','POLYGON'); SELECT tg_layer_id INTO land_parcels_id FROM user_sdo_topo_info WHERE topology = 'LAND_USE_HIER' AND table_name = 'LAND_PARCELS'; SDO_TOPO.ADD_TOPO_GEOMETRY_LAYER('LAND_USE_HIER', 'BLOCK_GROUPS', 'FEATURE','POLYGON', NULL, land_parcels_id); SELECT tg_layer_id INTO block_groups_id FROM user_sdo_topo_info WHERE topology = 'LAND_USE_HIER' AND table_name = 'BLOCK_GROUPS'; SDO_TOPO.ADD_TOPO_GEOMETRY_LAYER('LAND_USE_HIER', 'TRACTS', 'FEATURE','POLYGON', NULL, block_groups_id); SELECT tg_layer_id INTO tracts_id FROM user_sdo_topo_info WHERE topology = 'LAND_USE_HIER' AND table_name = 'TRACTS'; SDO_TOPO.ADD_TOPO_GEOMETRY_LAYER('LAND_USE_HIER', 'COUNTIES', 'FEATURE','POLYGON', NULL, tracts_id); SELECT tg_layer_id INTO counties_id FROM user_sdo_topo_info WHERE topology = 'LAND_USE_HIER' AND table_name = 'COUNTIES'; SDO_TOPO.ADD_TOPO_GEOMETRY_LAYER('LAND_USE_HIER', 'STATES', 'FEATURE','POLYGON', NULL, counties_id); END; / Within each level above level 0, each layer can contain features built from features at the next lower level (as is done in Example 1–2), features built from topological elements (faces, nodes, edges), or a combination of these. For example, a tracts layer can contain tracts built from block groups or tracts built from faces, or both. However, each feature within the layer must be built only either from features from the next lower level or from topological elements. For example, a specific tract can consist of block groups or it can consist of faces, but it cannot consist of a combination of block groups and faces. To insert or update topology geometry objects in feature tables for the levels in a hierarchy, use the appropriate forms of the SDO_TOPO_GEOMETRY constructor. Feature tables are described in Section 1.3, and SDO_TOPO_GEOMETRY constructors are described in Section 1.6.2. The TOPO_ID and TOPO_TYPE attributes in the relationship information table have special meanings when applied to parent layers in a topology with a topology geometry layer hierarchy. See the explanations of these attributes in Table 1–5 in Section 1.5.4. Note: 1-12 Oracle Spatial Topology and Network Data Models Topology Data Model Tables 1.5 Topology Data Model Tables To use the Spatial topology capabilities, you must first insert data into special edge, node, and face tables, which are created by Spatial when you create a topology. The edge, node, and face tables are described in Section 1.5.1, Section 1.5.2, and Section 1.5.3, respectively. Spatial automatically maintains a relationship information ( _ RELATION$) table for each topology, which is created the first time that a feature table is associated with a topology (that is, at the first call to the SDO_TOPO.ADD_TOPO_ GEOMETRY_LAYER procedure that specifies the topology). The relationship information table is described in Section 1.5.4. Figure 1–5 shows the role of the relationship information table in connecting information in a feature table with information in its associated node, edge, or face table. Figure 1–5 Mapping Between Feature Tables and Topology Tables Feature Table SDO_TOPO_GEOMETRY TG_LAYER_ID TG_ID Relationship information Table _RELATION$ Node, Edge, Face Tables TG_LAYER_ID TG_ID _NODE$ TOPO_ID NODE_ID TOPO_TYPE _EDGE$ EDGE_ID _FACE$ FACE_ID As shown in Figure 1–5, the mapping between feature tables and the topology node, edge, and face tables occurs through the _RELATION$ table. In particular: ■ ■ ■ Each feature table includes a column of type SDO_TOPO_GEOMETRY. This type includes a TG_LAYER_ID attribute (the unique ID assigned by Oracle Spatial when the layer is created), as well as a TG_ID attribute (the unique ID assigned to each feature in a layer). The values in these two columns have corresponding values in the TG_LAYER_ID and TG_ID columns in the _ RELATION$ table. Each feature has one or more rows in the _RELATION$ table. Given the TG_LAYER_ID and TG_ID values for a feature, the set of nodes, faces, and edges associated with the feature can be determined by matching the TOPO_ ID value (the node, edge, or face ID) in the _RELATION$ table with the corresponding ID value in the _NODE$, _EDGE$, or _FACE$ table. The following considerations apply to schema, table, and column names that are stored in any Oracle Spatial metadata views. For example, these considerations apply to the names of edge, node, face, relationship, and history information tables, and to the names of any columns in these tables and schemas for these tables that are stored in the topology metadata views described in Section 1.7. ■ The name must contain only letters, numbers, and underscores. For example, the name cannot contain a space ( ), an apostrophe ('), a quotation mark ("), or a comma (,). Topology Data Model Overview 1-13 Topology Data Model Tables ■ All letters in the names are converted to uppercase before the names are stored in metadata views or before the tables are accessed. This conversion also applies to any schema name specified with the table name. 1.5.1 Edge Information Table You must store information about the edges in a topology in the _ EDGE$ table, where is the name of the topology as specified in the call to the SDO_TOPO.CREATE_TOPOLOGY procedure. Each edge information table has the columns shown in Table 1–1. Table 1–1 Columns in the _EDGE$ Table Column Name Data Type Description EDGE_ID NUMBER Unique ID number for this edge START_NODE_ID NUMBER ID number of the start node for this edge END_NODE_ID NUMBER ID number of the end node for this edge NEXT_LEFT_EDGE_ID NUMBER ID number (signed) of the next left edge for this edge PREV_LEFT_EDGE_ID NUMBER ID number (signed) of the previous left edge for this edge NEXT_RIGHT_EDGE_ID NUMBER ID number (signed) of the next right edge for this edge PREV_RIGHT_EDGE_ID NUMBER ID number (signed) of the previous right edge for this edge LEFT_FACE_ID NUMBER ID number of the left face for this edge RIGHT_FACE_ID NUMBER ID number of the right face for this edge GEOMETRY SDO_GEOMETRY Geometry object (line string) representing this edge, listing the coordinates in the natural order for the positive directed edge The NEXT_LEFT_EDGE_ID and NEXT_RIGHT_EDGE_ID values refer to the next directed edges in the counterclockwise delineation of the perimeters of the left and right faces, respectively. The PREV_LEFT_EDGE_ID and PREV_RIGHT_EDGE_ID values refer to the previous directed edges in the counterclockwise delineation of the perimeters of the left and right faces, respectively. The LEFT_FACE_ID value refers to the face to the left of the positive directed edge, and the RIGHT_FACE_ID value refers to the face to the left of the negative directed edge. For any numeric ID value, the sign indicates which orientation of the target edge is being referred to. Figure 1–6 shows nodes, edges, and faces that illustrate the relationships among the various ID columns in the edge information table. (In Figure 1–6, thick lines show the edges, and thin lines with arrowheads show the direction of each edge.) 1-14 Oracle Spatial Topology and Network Data Models Topology Data Model Tables Figure 1–6 Nodes, Edges, and Faces E3 E5 F1 N1 N2 E1 E4 E2 F2 E7 E6 E8 N3 N4 Table 1–2 shows the ID column values in the edge information table for edges E4 and E8 in Figure 1–6. (For clarity, Table 1–2 shows ID column values with alphabetical characters, such as E4 and N1; however, the ID columns actually contain numeric values only, specifically the numeric ID value associated with each named object.) Table 1–2 Edge Table ID Column Values NEXT_ START_ END_ LEFT_ EDGE_ NODE_ NODE_ EDGE_ ID ID ID ID PREV_ LEFT_ EDGE_ ID NEXT_ RIGHT_ EDGE_ ID PREV_ RIGHT_ LEFT_ RIGHT_ EDGE_ FACE_ FACE_ ID ID ID E4 N1 N2 -E5 E3 E2 -E6 F1 F2 E8 N4 N3 -E8 -E8 E8 E8 F2 F2 In Figure 1–6 and Table 1–2: ■ ■ ■ ■ The start node and end node for edge E4 are N1 and N2, respectively. The next left edge for edge E4 is E5, but its direction is the opposite of edge E4, and therefore the next left edge for E4 is stored as -E5 (negative E5). The previous left edge for edge E4 is E3, and because it has the same direction as edge E4, the previous left edge for E4 is stored as E3. The next right face is determined using the negative directed edge of E4. This can be viewed as reversing the edge direction and taking the next left edge and previous left edge. In this case, the next right edge is E2 and the previous right edge is -E6 (the direction of edge E6 is opposite the negative direction of edge E4). For edge E4, the left face is F1 and the right face is F2. Edges E1 and E7 are neither leftmost nor rightmost edges with respect to edge E4, and therefore they do not appear in the edge table row associated with edge E4. 1.5.2 Node Information Table You must store information about the nodes in a topology in the _ NODE$ table, where is the name of the topology as specified in the call to the SDO_TOPO.CREATE_TOPOLOGY procedure. Each node information table has the columns shown in Table 1–3. Topology Data Model Overview 1-15 Topology Data Model Tables Table 1–3 Columns in the _NODE$ Table Column Name Data Type Description NODE_ID NUMBER Unique ID number for this node EDGE_ID NUMBER ID number (signed) of the edge (if any) associated with this node FACE_ID NUMBER ID number of the face (if any) associated with this node GEOMETRY SDO_GEOMETRY Geometry object (point) representing this node For each node, the EDGE_ID or FACE_ID value (but not both) must be null: ■ ■ If the EDGE_ID value is null, the node is an isolated node (that is, isolated in a face). If the FACE_ID value is null, the node is not an isolated node, but rather the start node or end node of an edge. 1.5.3 Face Information Table You must store information about the faces in a topology in the _ FACE$ table, where is the name of the topology as specified in the call to the SDO_TOPO.CREATE_TOPOLOGY procedure. Each face information table has the columns shown in Table 1–4. Table 1–4 Columns in the _FACE$ Table Column Name Data Type Description FACE_ID NUMBER Unique ID number for this face BOUNDARY_EDGE_ID NUMBER ID number of the boundary edge for this face. The sign of this number (which is ignored for use as a key) indicates which orientation is being used for this boundary component (positive numbers indicate the left of the edge, and negative numbers indicate the right of the edge). ISLAND_EDGE_ID_LIST SDO_LIST_TYPE Island edges (if any) in this face. (The SDO_ LIST_TYPE type is described in Section 1.6.6.) ISLAND_NODE_ID_LIST SDO_LIST_TYPE Island nodes (if any) in this face. (The SDO_ LIST_TYPE type is described in Section 1.6.6.) MBR_GEOMETRY SDO_GEOMETRY Minimum bounding rectangle (MBR) that encloses this face. (This is required, except for the universe face.) The MBR must be stored as an optimized rectangle (a rectangle in which only the lower-left and the upper-right corners are specified). The SDO_ TOPO.INITIALIZE_METADATA procedure creates a spatial index on this column. 1.5.4 Relationship Information Table As you work with topological elements, Spatial automatically maintains information about each object in _RELATION$ tables, where is 1-16 Oracle Spatial Topology and Network Data Models Topology Data Model Tables the name of the topology and there is one such table for each topology. Each row in the table uniquely identifies a topology geometry with respect to its topology geometry layer and topology. Each relationship information table has the columns shown in Table 1–5. Table 1–5 Columns in the _RELATION$ Table Column Name Data Type Description TG_LAYER_ID NUMBER ID number of the topology geometry layer to which the topology geometry belongs TG_ID NUMBER ID number of the topology geometry TOPO_ID NUMBER For a topology that does not have a topology geometry layer hierarchy: ID number of a topological element in the topology geometry For a topology that has a topology geometry layer hierarchy: Reserved for Oracle use TOPO_TYPE NUMBER For a topology that does not have a topology geometry layer hierarchy: 1 = node, 2 = edge, 3 = face For a topology that has a topology geometry layer hierarchy: Reserved for Oracle use TOPO_ATTRIBUTE VARCHAR2 Reserved for Oracle use 1.5.5 History Information Table The history information table for a topology contains information about editing operations that are not recorded in other information tables. Thus, the history information table is not a comprehensive record of topology modifications. Instead, it contains rows for node, edge, or face editing operations only when one or more feature tables are associated with the topology and any of the following conditions are met: ■ ■ An existing face or edge is split as a result of the operation. A single face or edge is created by merging two faces or two edges as a result of the operation. Spatial automatically maintains information about these operations in _HISTORY$ tables, where is the name of the topology and there is one such table for each topology. Each row in the table uniquely identifies an editing operation on a topological element, although an editing operation (such as using the SDO_TOPO_MAP.ADD_POLYGON_GEOMETRY function) can add multiple rows. (Topology editing is discussed in Chapter 2.) Each history information table has the columns shown in Table 1–6. Table 1–6 Columns in the _HISTORY$ Table Column Name Data Type Description TOPO_TX_ID NUMBER ID number of the transaction that was started by a call to the SDO_TOPO_MAP.LOAD_TOPO_MAP function or procedure or to the loadWindow or loadTopology Java method. Each transaction can consist of several editing operations. You can get the transaction ID number for the current updatable TopoMap object by calling the SDO_TOPO_MAP.GET_TOPO_TRANSACTION_ID function. TOPO_SEQUENCE NUMBER Sequence number assigned to an editing operation within the transaction Topology Data Model Overview 1-17 Topology Data Model Tables Table 1–6 (Cont.) Columns in the _HISTORY$ Table Column Name Data Type Description TOPOLOGY VARCHAR2 ID of the topology containing the objects being edited TOPO_ID NUMBER ID number of a topological element in the topology geometry TOPO_TYPE NUMBER Type of topological element: 1 = node, 2 = edge, 3 = face TOPO_OP VARCHAR2 Type of editing operation that was performed on the topological element: I for insert or D for delete PARENT_ID NUMBER For an insert operation, the ID of the parent topological element from which the current topological element is derived; for a delete operation, the ID of the resulting topological element Consider the following examples: ■ ■ Adding a node to break edge E2, generating edge E3: The TOPO_ID value of the new edge is the ID of E3, the TOPO_TYPE value is 2, the PARENT_ID value is the ID of E2, and the TOPO_OP value is I. Deleting a node to merge edges E6 and E7, resulting in E7: The TOPO_ID value is the ID of E6, the TOPO_TYPE value is 2, the PARENT_ID value is the ID of E7, and the TOPO_OP value is D. To further illustrate the effect of editing operations on the history information table, a test procedure was created to perform various editing operations on a simple topology, and to examine the effect on the history information table for the topology. The procedure performed these main steps: 1. It created and initialized a non-geodetic topology with a universe face, and added a line feature layer and an area feature layer to the topology. 2. It created a rectangular area by adding four isolated nodes and four edges connecting the isolated nodes. This caused a face (consisting of the rectangle) to be created, and it caused one row to be added to the history information table: an insert operation for the new face, whose parent is the universe face. The following statement shows the history information table row added by this insertion: SELECT topo_id, topo_type, topo_op, parent_id FROM hist_test_history$ ORDER BY topo_tx_id, topo_sequence, topology; TOPO_ID TOPO_TYPE TOP PARENT_ID ---------- ---------- --- ---------1 3 I -1 1 row selected. 3. It split the rectangular face into two smaller rectangular faces (side-by-side) by adding two nodes and a vertical edge connecting these nodes, which caused two edges (the top and bottom edges) and the face to be split. Three rows were added to the history information table: an insert operation for each of the two new edges (with the parent of each new edge being the existing edge that was split), and an insert operation for the new face (whose parent is the original rectangular face that was split). The following statement shows the history information table rows added thus far. The rows added by this step are shown in bold: 1-18 Oracle Spatial Topology and Network Data Models Topology Data Types SELECT topo_id, topo_type, topo_op, parent_id FROM hist_test_history$ ORDER BY topo_tx_id, topo_sequence, topology; TOPO_ID TOPO_TYPE TOP PARENT_ID ---------- ---------- --- ---------1 3 I -1 6 2 I 2 7 2 I 4 2 3 I 1 4 rows selected. 4. It added a diagonal edge to small rectangular face on the left (using the existing nodes), and it removed the vertical edge that was added in Step 3. Two rows were added to the history information table: an insert operation for the new face created as a result of the edge addition (with the parent of each new face being the small rectangular face on the left that was split), and a delete operation as a result of the edge removal (with the resulting face taking its topological object ID from one of the "parent" faces that were merged). The following statement shows the history information table rows added thus far. The rows added by this step are shown in bold: SELECT topo_id, topo_type, topo_op, parent_id FROM hist_test_history$ ORDER BY topo_tx_id, topo_sequence, topology; TOPO_ID TOPO_TYPE TOP PARENT_ID ---------- ---------- --- ---------1 3 I -1 6 2 I 2 7 2 I 4 2 3 I 1 3 3 I 2 1 3 D 2 6 rows selected. 1.6 Topology Data Types The main data type associated with the topology data model is SDO_TOPO_ GEOMETRY, which describes a topology geometry. The SDO_TOPO_GEOMETRY type has several constructors and member functions. This section describes the topology model types, constructors, and member functions. 1.6.1 SDO_TOPO_GEOMETRY Type The description of a topology geometry is stored in a single row, in a single column of object type SDO_TOPO_GEOMETRY in a user-defined table. The object type SDO_ TOPO_GEOMETRY is defined as: CREATE TYPE sdo_topo_geometry AS OBJECT (tg_type NUMBER, tg_id NUMBER, tg_layer_id NUMBER, topology_id NUMBER); The SDO_TOPO_GEOMETRY type has the attributes shown in Table 1–7. Topology Data Model Overview 1-19 Topology Data Types Table 1–7 SDO_TOPO_GEOMETRY Type Attributes Attribute Explanation TG_TYPE Type of topology geometry: 1 = point or multipoint, 2 = line string or multiline string, 3 = polygon or multipolygon, 4 = heterogeneous collection TG_ID Unique ID number (generated by Spatial) for the topology geometry TG_LAYER_ID ID number for the topology geometry layer to which the topology geometry belongs. (This number is generated by Spatial, and it is unique within the topology geometry layer.) TOPOLOGY_ID Unique ID number (generated by Spatial) for the topology Each topology geometry in a topology is uniquely identified by the combination of its TG_ID and TG_LAYER_ID values. You can use an attribute name in a query on an object of SDO_TOPO_GEOMETRY. Example 1–3 shows SELECT statements that query each attribute of the FEATURE column of the CITY_STREETS table, which is defined in Example 1–12 in Section 1.12. Example 1–3 SDO_TOPO_GEOMETRY Attributes in Queries SELECT SELECT SELECT SELECT s.feature.tg_type FROM city_streets s; s.feature.tg_id FROM city_streets s; s.feature.tg_layer_id FROM city_streets s; s.feature.topology_id FROM city_streets s; 1.6.2 SDO_TOPO_GEOMETRY Constructors The SDO_TOPO_GEOMETRY type has constructors for inserting and updating topology geometry objects. The constructors can be classified into two types, depending on the kind of objects they use: ■ ■ Constructors that specify the lowest-level topological elements (nodes, edges, and faces). These constructors have at least one attribute of type SDO_TOPO_OBJECT_ ARRAY and no attributes of type SDO_TGL_OBJECT_ARRAY. Constructors that specify elements in the child level. These constructors have at least one attribute of type SDO_TGL_OBJECT_ARRAY and no attributes of type SDO_TOPO_OBJECT_ARRAY. To insert and update topology geometry objects when the topology does not have a topology geometry layer hierarchy or when the operation affects the lowest level (level 0) in the hierarchy, you must use constructors that specify the lowest-level topological elements (nodes, edges, and faces). (Topology geometry layer hierarchy is explained in Section 1.4.) To insert and update topology geometry objects when the topology has a topology geometry layer hierarchy and the operation affects a level other than the lowest in the hierarchy, you can use either or both types of constructor. That is, for each topology geometry object to be inserted or updated, you can use either of the following: ■ ■ To insert and update a topology geometry object consisting of the lowest-level topological elements (for example, to create a tract from faces), use the format that has at least one attribute of type SDO_TOPO_OBJECT_ARRAY and no attributes of type SDO_TGL_OBJECT_ARRAY. To insert and update a topology geometry object consisting of features at the next lower level (for example, create a tract from block groups), use the format that has 1-20 Oracle Spatial Topology and Network Data Models Topology Data Types at least one attribute of type SDO_TGL_OBJECT_ARRAY and no attributes of type SDO_TOPO_OBJECT_ARRAY. This section describes the available SDO_TOPO_GEOMETRY constructors. An additional SDO_TOPO_GEOMETRY constructor with the same attributes as the type definition (tg_type, tg_id, tg_ layer_id, topology_id) is for Oracle internal use only. Note: 1.6.2.1 Constructors for Insert Operations: Specifying Topological Elements The SDO_TOPO_GEOMETRY type has the following constructors for insert operations in which you specify topological elements (faces, nodes, or edges). You must use one of these formats to create new topology geometry objects when the topology does not have a topology geometry layer hierarchy or when the operation affects the lowest level (level 0) in the hierarchy, and you can use one of these formats to create new topology geometry objects when the operation affects a level higher than level 0 in the hierarchy: SDO_TOPO_GEOMETRY (topology tg_type tg_layer_id topo_ids SDO_TOPO_GEOMETRY (topology table_name column_name tg_type topo_ids VARCHAR2, NUMBER, NUMBER, SDO_TOPO_OBJECT_ARRAY) VARCHAR2, VARCHAR2, VARCHAR2, NUMBER, SDO_TOPO_OBJECT_ARRAY) The SDO_TOPO_OBJECT_ARRAY type is defined as a VARRAY of SDO_TOPO_ OBJECT objects. The SDO_TOPO_OBJECT type has the following two attributes: (topo_id NUMBER, topo_type NUMBER) The TG_TYPE and TOPO_IDS attribute values must be within the range of values from the _RELATION$ table (described in Section 1.5.4) for the specified topology. Example 1–4 shows two SDO_TOPO_GEOMETRY constructors, one in each format. Each constructor inserts a topology geometry into the LAND_PARCELS table, which is defined in Example 1–12 in Section 1.12. Example 1–4 INSERT Using Constructor with SDO_TOPO_OBJECT_ARRAY INSERT INTO land_parcels VALUES ('P1', -- Feature name SDO_TOPO_GEOMETRY( 'CITY_DATA', -- Topology name 3, -- Topology geometry type (polygon/multipolygon) 1, -- TG_LAYER_ID for this topology (from ALL_SDO_TOPO_METADATA) SDO_TOPO_OBJECT_ARRAY ( SDO_TOPO_OBJECT (3, 3), -- face_id = 3 SDO_TOPO_OBJECT (6, 3))) -- face_id = 6 ); INSERT INTO land_parcels VALUES ('P1A', -- Feature name SDO_TOPO_GEOMETRY( 'CITY_DATA', -- Topology name Topology Data Model Overview 1-21 Topology Data Types 'LAND_PARCELS', -- Table name 'FEATURE', -- Column name 3, -- Topology geometry type (polygon/multipolygon) SDO_TOPO_OBJECT_ARRAY ( SDO_TOPO_OBJECT (3, 3), -- face_id = 3 SDO_TOPO_OBJECT (6, 3))) -- face_id = 6 ); 1.6.2.2 Constructors for Insert Operations: Specifying Lower-Level Features The SDO_TOPO_GEOMETRY type has the following constructors for insert operations in which you specify features in the next lower level of the hierarchy. You can use one of these formats to create new topology geometry objects when the operation affects a level higher than level 0 in the hierarchy: SDO_TOPO_GEOMETRY (topology tg_type tg_layer_id topo_ids VARCHAR2, NUMBER, NUMBER, SDO_TGL_OBJECT_ARRAY) SDO_TOPO_GEOMETRY (topology table_name column_name tg_type topo_ids VARCHAR2, VARCHAR2, VARCHAR2, NUMBER, SDO_TGL_OBJECT_ARRAY) The SDO_TGL_OBJECT_ARRAY type is defined as a VARRAY of SDO_TGL_OBJECT objects. The SDO_TGL_OBJECT type has the following two attributes: (tgl_id NUMBER, tg_id NUMBER) Example 1–5 shows an SDO_TOPO_GEOMETRY constructor that inserts a row into the BLOCK_GROUPS table, which is the feature table for the Block Groups level in the topology geometry layer hierarchy. The Block Groups level is the parent of the Land Parcels level at the bottom of the hierarchy. Example 1–5 INSERT Using Constructor with SDO_TGL_OBJECT_ARRAY INSERT INTO block_groups VALUES ('BG1', -- Feature name SDO_TOPO_GEOMETRY('LAND_USE_HIER', 3, -- Topology geometry type (polygon/multipolygon) 2, -- TG_LAYER_ID for block groups (from ALL_SDO_TOPO_METADATA) SDO_TGL_OBJECT_ARRAY ( SDO_TGL_OBJECT (1, 1), -- land parcel ID = 1 SDO_TGL_OBJECT (1, 2))) -- land parcel ID = 2 ); 1.6.2.3 Constructors for Update Operations: Specifying Topological Elements The SDO_TOPO_GEOMETRY type has the following constructors for update operations in which you specify topological elements (faces, nodes, or edges). You must use one of these formats to update topology geometry objects when the topology does not have a topology geometry layer hierarchy or when the operation affects the lowest level (level 0) in the hierarchy, and you can use one of these formats to update topology geometry objects when the operation affects a level higher than level 0 in the hierarchy: SDO_TOPO_GEOMETRY (topology tg_type 1-22 Oracle Spatial Topology and Network Data Models VARCHAR2, NUMBER, Topology Data Types tg_layer_id add_topo_ids delete_topo_ids NUMBER, SDO_TOPO_OBJECT_ARRAY, SDO_TOPO_OBJECT_ARRAY) SDO_TOPO_GEOMETRY (topology table_name column_name tg_type add_topo_ids delete_topo_ids VARCHAR2, VARCHAR2, VARCHAR2, NUMBER, SDO_TOPO_OBJECT_ARRAY, SDO_TOPO_OBJECT_ARRAY) For example, you could use one of these constructor formats to add an edge to a linear feature or to remove an obsolete edge from a feature. The SDO_TOPO_OBJECT_ARRAY type definition and the requirements for the TG_ TYPE and TOPO_IDS attribute values are as described in Section 1.6.2.1. You can specify values for both the ADD_TOPO_IDS and DELETE_TOPO_IDS attributes, or you can specify values for one attribute and specify the other as null; however, you cannot specify null values for both ADD_TOPO_IDS and DELETE_ TOPO_IDS. Example 1–6 shows two SDO_TOPO_GEOMETRY constructors, one in each format. Each constructor removes two faces from the CITY_DATA topology in the LAND_ PARCELS table, which is defined in Example 1–12 in Section 1.12. Example 1–6 UPDATE Using Constructor with SDO_TOPO_OBJECT_ARRAY UPDATE land_parcels l SET l.feature = SDO_TOPO_GEOMETRY( 'CITY_DATA', -- Topology name 3, -- Topology geometry type (polygon/multipolygon) 1, -- TG_LAYER_ID for this topology (from ALL_SDO_TOPO_METADATA) NULL, -- No topological elements to be added SDO_TOPO_OBJECT_ARRAY ( SDO_TOPO_OBJECT (3, 3), -- face_id = 3 SDO_TOPO_OBJECT (6, 3))) -- face_id = 6 WHERE l.feature_name = 'P1'; UPDATE land_parcels l SET l.feature = SDO_TOPO_GEOMETRY( 'CITY_DATA', -- Topology name 'LAND_PARCELS', -- Table name 'FEATURE', -- Column name 3, -- Topology geometry type (polygon/multipolygon) NULL, -- No topological elements to be added SDO_TOPO_OBJECT_ARRAY ( SDO_TOPO_OBJECT (3, 3), -- face_id = 3 SDO_TOPO_OBJECT (6, 3))) -- face_id = 6 WHERE l.feature_name = 'P1A'; 1.6.2.4 Constructors for Update Operations: Specifying Lower-Level Features The SDO_TOPO_GEOMETRY type has the following constructors for update operations in which you specify features in the next lower level of the hierarchy. You can use one of these formats to update topology geometry objects when the operation affects a level higher than level 0 in the hierarchy: SDO_TOPO_GEOMETRY (topology tg_type tg_layer_id add_topo_ids delete_topo_ids VARCHAR2, NUMBER, NUMBER, SDO_TGL_OBJECT_ARRAY, SDO_TGL_OBJECT_ARRAY) Topology Data Model Overview 1-23 Topology Data Types SDO_TOPO_GEOMETRY (topology table_name column_name tg_type add_topo_ids delete_topo_ids VARCHAR2, VARCHAR2, VARCHAR2, NUMBER, SDO_TGL_OBJECT_ARRAY, SDO_TGL_OBJECT_ARRAY) For example, you could use one of these constructor formats to add an edge to a linear feature or to remove an obsolete edge from a feature. The SDO_TGL_OBJECT_ARRAY type definition and the requirements for its attribute values are as described in Section 1.6.2.2. You can specify values for both the ADD_TOPO_IDS and DELETE_TOPO_IDS attributes, or you can specify values for one attribute and specify the other as null; however, you cannot specify null values for both ADD_TOPO_IDS and DELETE_ TOPO_IDS. Example 1–7 shows two SDO_TOPO_GEOMETRY constructors, one in each format. Each constructor deletes the land parcel with the ID value of 2 from a feature (named BG1 in the first format and BG1A in the second format, though each feature has the same definition) from the CITY_DATA topology in the BLOCK_GROUPS table, which is the feature table for the Block Groups level in the topology geometry layer hierarchy. The Block Groups level is the parent of the Land Parcels level at the bottom of the hierarchy. Example 1–7 UPDATE Using Constructor with SDO_TGL_OBJECT_ARRAY UPDATE block_groups b SET b.feature = SDO_TOPO_GEOMETRY( 'LAND_USE_HIER', 3, -- Topology geometry type (polygon/multipolygon) 2, -- TG_LAYER_ID for block groups (from ALL_SDO_TOPO_METADATA) null, -- No IDs to add SDO_TGL_OBJECT_ARRAY ( SDO_TGL_OBJECT (1, 2)) -- land parcel ID = 2 ) WHERE b.feature_name = 'BG1'; UPDATE block_groups b SET b.feature = SDO_TOPO_GEOMETRY( 'LAND_USE_HIER', 'BLOCK_GROUPS', -- Feature table 'FEATURE', -- Feature column 3, -- Topology geometry type (polygon/multipolygon) null, -- No IDs to add SDO_TGL_OBJECT_ARRAY ( SDO_TGL_OBJECT (1, 2)) -- land parcel ID = 2 ) WHERE b.feature_name = 'BG1A'; 1.6.3 GET_GEOMETRY Member Function The SDO_TOPO_GEOMETRY type has a member function GET_GEOMETRY, which you can use to return the SDO_GEOMETRY object for the topology geometry object. Example 1–8 uses the GET_GEOMETRY member function to return the SDO_ GEOMETRY object for the topology geometry object associated with the land parcel named P1. 1-24 Oracle Spatial Topology and Network Data Models Topology Data Types Example 1–8 GET_GEOMETRY Member Function SELECT l.feature_name, l.feature.get_geometry() FROM land_parcels l WHERE l.feature_name = 'P1'; FEATURE_NAME -----------------------------L.FEATURE.GET_GEOMETRY()(SDO_GTYPE, SDO_SRID, SDO_POINT(X, Y, Z), SDO_ELEM_INFO, -------------------------------------------------------------------------------P1 SDO_GEOMETRY(2003, NULL, NULL, SDO_ELEM_INFO_ARRAY(1, 3, 1), SDO_ORDINATE_ARRAY( 21, 14, 21, 22, 9, 22, 9, 14, 9, 6, 21, 6, 21, 14)) 1.6.4 GET_TGL_OBJECTS Member Function The SDO_TOPO_GEOMETRY type has a member function GET_TGL_OBJECTS, which you can use to return the SDO_TOPO_OBJECT_ARRAY object for a topology geometry object in a geometry layer with a hierarchy level greater than 0 (zero) in a topology with a topology geometry layer hierarchy. (If the layer is at hierarchy level 0 or is in a topology that does not have a topology geometry layer hierarchy, this method returns a null value.) The SDO_TGL_OBJECT_ARRAY type is described in Section 1.6.2.2. Example 1–9 uses the GET_TGL_OBJECTS member function to return the SDO_ TOPO_OBJECT_ARRAY object for the topology geometry object associated with the block group named BG2. Example 1–9 GET_TGL_OBJECTS Member Function SELECT bg.feature_name, bg.feature.get_tgl_objects() FROM block_groups bg WHERE bg.feature_name = 'BG2'; FEATURE_NAME -----------------------------BG.FEATURE.GET_TGL_OBJECTS()(TGL_ID, TG_ID) -------------------------------------------------------------------------------BG2 SDO_TGL_OBJECT_ARRAY(SDO_TGL_OBJECT(1, 3), SDO_TGL_OBJECT(1, 4)) 1.6.5 GET_TOPO_ELEMENTS Member Function The SDO_TOPO_GEOMETRY type has a member function GET_TOPO_ELEMENTS, which you can use to return the SDO_TOPO_OBJECT_ARRAY object for the topology geometry object. The SDO_TOPO_OBJECT_ARRAY type is described in Section 1.6.2.1. Example 1–8 uses the GET_TOPO_ELEMENTS member function to return the SDO_ TOPO_OBJECT_ARRAY object for the topology geometry object associated with the land parcel named P1. Example 1–10 GET_TOPO_ELEMENTS Member Function SELECT l.feature_name, l.feature.get_topo_elements() FROM land_parcels l WHERE l.feature_name = 'P1'; FEATURE_NAME -----------------------------L.FEATURE.GET_TOPO_ELEMENTS()(TOPO_ID, TOPO_TYPE) -------------------------------------------------------------------------------- Topology Data Model Overview 1-25 Topology Metadata Views P1 SDO_TOPO_OBJECT_ARRAY(SDO_TOPO_OBJECT(3, 3), SDO_TOPO_OBJECT(6, 3)) 1.6.6 SDO_LIST_TYPE Type The SDO_LIST_TYPE type is used to store the EDGE_ID values of island edges and NODE_ID values of island nodes in a face. The SDO_LIST_TYPE type is defined as: CREATE TYPE sdo_list_type as VARRAY(2147483647) OF NUMBER; 1.6.7 SDO_EDGE_ARRAY and SDO_NUMBER_ARRAY Types The SDO_EDGE_ARRAY type is used to specify the coordinates of attached edges affected by a node move operation. The SDO_EDGE_ARRAY type is defined as: CREATE TYPE sdo_edge_array as VARRAY(1000000) OF MDSYS.SDO_NUMBER_ARRAY; The SDO_NUMBER_ARRAY type is a general-purpose type used by Spatial for arrays. The SDO_NUMBER_ARRAY type is defined as: CREATE TYPE sdo_number_array as VARRAY(1048576) OF NUMBER; 1.7 Topology Metadata Views There are two sets of topology metadata views for each schema (user): xxx_SDO_ TOPO_INFO and xxx_SDO_TOPO_METADATA, where xxx can be USER or ALL. These views are read-only to users; they are created and maintained by Spatial. The xxx_SDO_TOPO_METADATA views contain the most detailed information, and each xxx_SDO_TOPO_INFO view contains a subset of the information in its corresponding xxx_SDO_TOPO_METADATA view. 1.7.1 xxx_SDO_TOPO_INFO Views The following views contain basic information about topologies: ■ ■ USER_SDO_TOPO_INFO contains topology information for all feature tables owned by the user. ALL_SDO_TOPO_INFO contains topology information for all feature tables on which the user has SELECT permission. The USER_SDO_TOPO_INFO and ALL_SDO_TOPO_INFO views contain the same columns, as shown Table 1–8. (The columns are listed in their order in the view definition.) Table 1–8 Columns in the xxx_SDO_TOPO_INFO Views Column Name Data Type OWNER VARCHAR2 Owner of the topology TOPOLOGY VARCHAR2 Name of the topology TOPOLOGY_ID NUMBER ID number of the topology TOLERANCE NUMBER Tolerance value associated with topology geometries in the topology. (Tolerance is explained in Chapter 1 of the Oracle Spatial User's Guide and Reference.) Oracle Spatial uses the tolerance value in building R-tree indexes on the node, edge, and face tables; the value is also used for any spatial queries that use these tables. 1-26 Oracle Spatial Topology and Network Data Models Purpose Topology Metadata Views Table 1–8 (Cont.) Columns in the xxx_SDO_TOPO_INFO Views Column Name Data Type Purpose SRID NUMBER Coordinate system (spatial reference system) associated with all topology geometry layers in the topology. Is null if no coordinate system is associated; otherwise, it contains a value from the SRID column of the MDSYS.CS_SRS table (described in Oracle Spatial User's Guide and Reference). TABLE_SCHEMA VARCHAR2 Name of the schema that owns the table containing the topology geometry layer column TABLE_NAME VARCHAR2 Name of the table containing the topology geometry layer column COLUMN_NAME VARCHAR2 Name of the column containing the topology geometry layer data TG_LAYER_ID NUMBER TG_LAYER_TYPE VARCHAR2 Contains one of the following: POINT, LINE, CURVE, POLYGON, or COLLECTION. (LINE and CURVE have the same meaning.) TG_LAYER_LEVEL NUMBER Hierarchy level number of this topology geometry layer. (Topology geometry layer hierarchy is explained in Section 1.4.) CHILD_LAYER_ID NUMBER ID number of the topology geometry layer that is the child layer of this layer in the topology geometry layer hierarchy. Null if this layer has no child layer or if the topology does not have a topology geometry layer hierarchy. (Topology geometry layer hierarchy is explained in Section 1.4.) DIGITS_RIGHT_OF_ DECIMAL NUMBER Number of digits permitted to the right of the decimal point in the expression of any coordinate position when features are added to an existing topology. All incoming features (those passed as arguments to the addLinearGeometry, addPolygonGeometry, or addPointGeometry method in the Java API or the equivalent PL/SQL subprograms) are automatically snapped (truncated) to the number of digits right of the decimal. Default: 16. ID number of the topology geometry layer 1.7.2 xxx_SDO_TOPO_METADATA Views The following views contain detailed information about topologies: ■ ■ USER_SDO_TOPO_METADATA contains topology information for all tables owned by the user. ALL_SDO_TOPO_METADATA contains topology information for all tables on which the user has SELECT permission. The USER_SDO_TOPO_METADATA and ALL_SDO_TOPO_METADATA views contain the same columns, as shown Table 1–9. (The columns are listed in their order in the view definition.) Table 1–9 Columns in the xxx_SDO_TOPO_METADATA Views Column Name Data Type Purpose OWNER VARCHAR2 Owner of the topology TOPOLOGY VARCHAR2 Name of the topology Topology Data Model Overview 1-27 Topology Metadata Views Table 1–9 (Cont.) Columns in the xxx_SDO_TOPO_METADATA Views Column Name Data Type Purpose TOPOLOGY_ID NUMBER ID number of the topology TOLERANCE NUMBER Tolerance value associated with topology geometries in the topology. (Tolerance is explained in Chapter 1 of Oracle Spatial User's Guide and Reference.) Oracle Spatial uses the tolerance value in building R-tree indexes on the node, edge, and face tables; the value is also used for any spatial queries that use these tables. SRID NUMBER Coordinate system (spatial reference system) associated with all topology geometry layers in the topology. Is null if no coordinate system is associated; otherwise, contains a value from the SRID column of the MDSYS.CS_SRS table (described in Oracle Spatial User's Guide and Reference). TABLE_SCHEMA VARCHAR2 Name of the schema that owns the table containing the topology geometry layer column TABLE_NAME VARCHAR2 Name of the table containing the topology geometry layer column COLUMN_NAME VARCHAR2 Name of the column containing the topology geometry layer data TG_LAYER_ID NUMBER TG_LAYER_TYPE VARCHAR2 Contains one of the following: POINT, LINE, CURVE, POLYGON, or COLLECTION. (LINE and CURVE have the same meaning.) TG_LAYER_LEVEL NUMBER Hierarchy level number of this topology geometry layer. (Topology geometry layer hierarchy is explained in Section 1.4.) CHILD_LAYER_ID NUMBER ID number of the topology geometry layer that is the child layer of this layer in the topology geometry layer hierarchy. Null if this layer has no child layer or if the topology does not have a geometry layer hierarchy. (Topology geometry layer hierarchy is explained in Section 1.4.) NODE_SEQUENCE VARCHAR2 Name of the sequence containing the next available node ID number EDGE_SEQUENCE VARCHAR2 Name of the sequence containing the next available edge ID number FACE_SEQUENCE VARCHAR2 Name of the sequence containing the next available face ID number TG_SEQUENCE VARCHAR2 Name of the sequence containing the next available topology geometry ID number DIGITS_RIGHT_OF_ DECIMAL NUMBER 1-28 Oracle Spatial Topology and Network Data Models ID number of the topology geometry layer Number of digits permitted to the right of the decimal point in the expression of any coordinate position when features are added to an existing topology. All incoming features (those passed as arguments to the addLinearGeometry, addPolygonGeometry, or addPointGeometry method in the Java API or the equivalent PL/SQL subprograms) are automatically snapped (truncated) to the number of digits right of the decimal. Default: 16 Topology Application Programming Interface 1.8 Topology Application Programming Interface The topology data model application programming interface (API) consists of the following: ■ PL/SQL functions and procedures in the SDO_TOPO package (described in Chapter 3) and the SDO_TOPO_MAP package (described in Chapter 4) ■ PL/SQL topology operators (described in Section 1.8.1) ■ Java API (described in Section 1.8.2) 1.8.1 Topology Operators With the topology data model PL/SQL API, you can use the Oracle Spatial operators, except for the following: ■ SDO_RELATE (but you can use the SDO_RELATE convenience operators that do not use the mask parameter) ■ SDO_NN ■ SDO_NN_DISTANCE ■ SDO_WITHIN_DISTANCE To use spatial operators with the topology data model, you must understand the usage and reference information about Spatial operators, which are documented in Oracle Spatial User's Guide and Reference. This section describes only additional information or differences that apply to using spatial operators with topologies. Otherwise, unless this section specifies otherwise, the operator-related information in Oracle Spatial User's Guide and Reference applies to the use of operators with topology data. When you use spatial operators with topologies, the formats of the first two parameters can be any one of the following: ■ Two topology geometry objects (type SDO_TOPO_GEOMETRY) For example, the following statement finds all city streets features that have any interaction with a land parcel feature named P3. (This example uses definitions and data from Section 1.12.1.) SELECT c.feature_name FROM city_streets c, land_parcels l WHERE l.feature_name = 'P3' AND SDO_ANYINTERACT (c.feature, l.feature) = 'TRUE'; FEATURE_NAME -----------------------------R1 ■ A topology geometry object (type SDO_TOPO_GEOMETRY) as the first parameter and a spatial geometry (type SDO_GEOMETRY) as the second parameter For example, the following statement finds all city streets features that have any interaction with a geometry object that happens to be a polygon identical to the boundary of the land parcel feature named P3. (This example uses definitions and data from Section 1.12.2.) SELECT c.feature_name FROM city_streets c WHERE SDO_ANYINTERACT (c.feature, SDO_GEOMETRY(2003, NULL, NULL, SDO_ELEM_INFO_ARRAY(1,1003,1), SDO_ORDINATE_ARRAY(35,6, 47,6, 47,14, 47,22, 35,22, 35,14, 35,6))) = 'TRUE'; Topology Data Model Overview 1-29 Topology Application Programming Interface FEATURE_NAME -----------------------------R1 ■ A topology geometry object (type SDO_TOPO_GEOMETRY) as the first parameter and a topology object array object (type SDO_TOPO_OBJECT_ARRAY) as the second parameter For example, the following statement finds all city streets features that have any interaction with an SDO_TOPO_OBJECT_ARRAY object that happens to be identical to the land parcel feature named P3. (This example uses definitions and data from Section 1.12.2.) SELECT c.feature_name FROM city_streets c WHERE SDO_ANYINTERACT (c.feature, SDO_TOPO_OBJECT_ARRAY (SDO_TOPO_OBJECT (5, 3), SDO_TOPO_OBJECT (8, 3))) = 'TRUE'; FEATURE_NAME -----------------------------R1 Example 1–11 shows different topology operators checking for a specific relationship between city streets features and the land parcel named P3. The first statement shows the SDO_FILTER operator, and the remaining statements show the SDO_RELATE convenience operators that include the "mask" in the operator name. With the convenience operators in this example, only SDO_ANYINTERACT, SDO_ OVERLAPBDYINTERSECT, and SDO_OVERLAPS return any resulting feature data. (As Figure 1–3 in Section 1.3.1 shows, the only street feature to have any interaction with land parcel P3 is R1.) All statements in Example 1–11 use the format where the first two parameters are topology geometry objects. Example 1–11 Topology Operators -- SDO_FILTER SELECT c.feature_name FROM city_streets c, land_parcels l WHERE l.feature_name = 'P3' AND SDO_FILTER (c.feature, l.feature) = 'TRUE'; FEATURE_NAME -----------------------------R1 -- SDO_RELATE convenience operators SELECT c.feature_name FROM city_streets c, land_parcels l WHERE l.feature_name = 'P3' AND SDO_ANYINTERACT (c.feature, l.feature) = 'TRUE'; FEATURE_NAME -----------------------------R1 SELECT c.feature_name FROM city_streets c, land_parcels l WHERE l.feature_name = 'P3' AND SDO_CONTAINS (c.feature, l.feature) = 'TRUE'; no rows selected SELECT c.feature_name FROM city_streets c, land_parcels l WHERE l.feature_name = 'P3' AND 1-30 Oracle Spatial Topology and Network Data Models Topology Application Programming Interface SDO_COVEREDBY (c.feature, l.feature) = 'TRUE'; no rows selected SELECT c.feature_name FROM city_streets c, land_parcels l WHERE l.feature_name = 'P3' AND SDO_COVERS (c.feature, l.feature) = 'TRUE'; no rows selected SELECT c.feature_name FROM city_streets c, land_parcels l WHERE l.feature_name = 'P3' AND SDO_EQUAL (c.feature, l.feature) = 'TRUE'; no rows selected SELECT c.feature_name FROM city_streets c, land_parcels l WHERE l.feature_name = 'P3' AND SDO_INSIDE (c.feature, l.feature) = 'TRUE'; no rows selected SELECT c.feature_name FROM city_streets c, land_parcels l WHERE l.feature_name = 'P3' AND SDO_ON (c.feature, l.feature) = 'TRUE'; no rows selected SELECT c.feature_name FROM city_streets c, land_parcels l WHERE l.feature_name = 'P3' AND SDO_OVERLAPBDYINTERSECT (c.feature, l.feature) = 'TRUE'; FEATURE_NAME -----------------------------R1 SELECT c.feature_name FROM city_streets c, land_parcels l WHERE l.feature_name = 'P3' AND SDO_OVERLAPBDYDISJOINT (c.feature, l.feature) = 'TRUE'; no rows selected SELECT c.feature_name FROM city_streets c, land_parcels l WHERE l.feature_name = 'P3' AND SDO_OVERLAPS (c.feature, l.feature) = 'TRUE'; FEATURE_NAME -----------------------------R1 SELECT c.feature_name FROM city_streets c, land_parcels l WHERE l.feature_name = 'P3' AND SDO_TOUCH (c.feature, l.feature) = 'TRUE'; no rows selected See also the usage notes for the SDO_TOPO.RELATE function in Chapter 3. Topology Data Model Overview 1-31 Exporting and Importing Topology Data 1.8.2 Topology Data Model Java Interface The Java client interface for the topology data model consists of the following classes: ■ TopoMap: class that stores edges, nodes, and faces, and provides methods for adding and deleting elements while maintaining topological consistency both in the cache and in the underlying database tables ■ Edge: class for an edge ■ Face: class for a face ■ Node: class for a node ■ Point2DD: class for a point ■ CompGeom: class for static computational geometry methods ■ InvalidTopoOperationException: class for the invalid topology operation exception ■ TopoValidationException: class for the topology validation failure exception ■ TopoEntityNotFoundException: class for the entity not found exception ■ TopoDataException: class for the invalid input exception For detailed reference information about the topology data model classes, as well as some usage information about the Java API, see the Javadoc-generated API documentation: open index.html in a directory that includes the path sdotopo/doc/javadoc. 1.9 Exporting and Importing Topology Data You can export a topology from one database and import it into a new topology with the same name, structures, and data in another database, as long as the target database does not already contain a topology with the same name as the exported topology. To export topology data from one database and import it into another database, follow the steps in this section. In the database with the topology data to be exported, perform the following actions: 1. Connect to the database as the owner of the topology. 2. Execute the SDO_TOPO.PREPARE_FOR_EXPORT procedure (documented in Chapter 3), to create the topology export information table, with a name in the format _EXP$. (This table contains the same columns as the USER_SDO_TOPO_INFO and ALL_SDO_TOPO_INFO views. These columns are described in Table 1–8 in Section 1.7.1.) For example, preparing the sample CITY_DATA topology for export creates the CITY_DATA_EXP$ table. 3. Export all tables related to the topology, including the feature tables and the _EXP$ table. This creates a file with the extension .dmp (for example, city_data.dmp). In the database into which to import the topology data, perform the following actions: 1. Connect to the target database, that is, the database in which to create a topology with the same name, structures, and data as the topology exported from the source database. Connect as the user for the schema that is to own the topology to be created. 1-32 Oracle Spatial Topology and Network Data Models Cross-Schema Usage and Editing Considerations 2. Ensure that the target database does not already contain a topology with the same name as the topology in the .dmp file. 3. Import the tables from the .dmp file that you created when you exported the topology data. Specify the indexes=N option. 4. If you have imported the topology tables into a different schema than the one used for the topology in the source database, update the OWNER column value in all rows of the _EXP$ table to reflect the schema name in the current (target) database. 5. Execute the SDO_TOPO.INITIALIZE_AFTER_IMPORT procedure, which creates the topology and performs other operations, as necessary, to make the topology ready for use. 1.10 Cross-Schema Usage and Editing Considerations This section contains requirements and guidelines for using and editing topologies when multiple database users (schemas) are involved. 1.10.1 Cross-Schema Topology Usage The following considerations apply when one user owns a topology and another user owns a topology geometry layer table. In the following, assume that user A owns the CITY_DATA topology and that user B owns the CITY_STREETS topology geometry layer table. ■ ■ The owner of the topology must create the topology and initialize the metadata. In this example, user A must perform these actions. Only the owner of a topology can add layers to or delete layers from the topology. Therefore, if you add a table owned by another user to a topology, or when you remove such a table from the topology, you must qualify the table name with the schema name. For example, user A could add the CITY_STREETS table owned by user B to the CITY_DATA topology with the following statement: EXECUTE SDO_TOPO.ADD_TOPO_GEOMETRY_LAYER('CITY_DATA', 'B.CITY_STREETS', 'FEATURE', 'LINE'); User A could delete the CITY_STREETS table owned by user B from the CITY_ DATA topology with the following statement: EXECUTE SDO_TOPO.DELETE_TOPO_GEOMETRY_LAYER('CITY_DATA', 'B.CITY_STREETS', 'FEATURE'); ■ ■ The owner of the topology should grant the SELECT privilege on the node, edge, and face information tables to the owner of the topology geometry layer table. For example, user A should grant the SELECT privilege on the CITY_DATA_NODE$, CITY_DATA_EDGE$, and CITY_DATA_FACE$ tables to user B. The owner of the topology geometry layer table should grant the SELECT and INDEX privileges on that table to the owner of the topology. For example, user B should grant the SELECT and INDEX privileges on the CITY_STREETS table to user A. The owner of the topology geometry layer table should also grant appropriate privileges to other users that need to access the table. For read-only access, grant the SELECT privilege on the table to a user; for read/write access, grant the INSERT, SELECT, and UPDATE privileges. Topology Data Model Overview 1-33 Function-Based Indexes Not Supported 1.10.2 Cross-Schema Topology Editing The following considerations apply when one user owns a topology and another user wants to edit the topology. In the following, assume that user A owns the CITY_DATA topology and that user B wants to edit that topology. ■ The owner of the topology should grant the following privileges to users who can edit the topology: INSERT, SELECT, and UPDATE on the node, edge, face, and relationship information tables, and SELECT on the node, edge, and face sequences used to generate ID numbers for the topology primitives. For example, user A could grant the following privileges to user B, where the table names end with $ and the sequence names end with _S: GRANT GRANT GRANT GRANT GRANT GRANT GRANT ■ insert,select,update ON city_data_node$ TO b; insert,select,update ON city_data_edge$ TO b; insert,select,update ON city_data_face$ TO b; insert,select,update ON city_data_relation$ TO b; select ON city_data_node_s TO b; select ON city_data_edge_s TO b; select ON city_data_face_s TO b; When a user who does not own the topology edits that topology, the owner's schema name should be specified with the topology name in functions and procedures that accept the topology name as an input parameter. For example, user B should specify the topology as A.CITY_DATA, not just CITY_DATA. For information about editing topologies, see Chapter 2. 1.11 Function-Based Indexes Not Supported You cannot create a function-based index on a column of type SDO_TOPO_ GEOMETRY. (Function-based indexes are explained in Oracle Database Application Developer's Guide - Fundamentals and Oracle Database Administrator's Guide.) 1.12 Topology Examples (PL/SQL) This section presents simplified PL/SQL examples that perform topology data model operations. The examples refer to concepts that are explained in this chapter. They use SDO_TOPO and SDO_TOPO_MAP functions and procedures, which are documented in Chapter 3 and Chapter 4, and the SDO_ANYINTERACT topology operator (see Section 1.8.1). Both examples are based on the "city data" topology shown in Figure 1–1 in Section 1.2, and the features shown in Figure 1–3 in Section 1.3.1. However, the topologies created are not identical, because the topology built from Spatial geometries (Example 1–13) does not contain all the edges, nodes, and faces that are defined for the topology build from topology data (Example 1–12). 1.12.1 Topology Built from Topology Data Example 1–12 uses a topology built from edge, node, and face data. Example 1–12 Topology Built from Topology Data ------------------------------- Main steps for using the topology data model with a topology -- built from edge, node, and face data ------------------------------- 1. Create a topology. 1-34 Oracle Spatial Topology and Network Data Models Topology Examples (PL/SQL) -------- 2. 3. 4. 5. 6. 7. 8. Load (normally bulk-load) topology data (node, edge, and face tables). Create feature tables. Associate feature tables with the topology. Initialize topology metadata. Load feature tables using the SDO_TOPO_GEOMETRY constructor. Query the data. Optionally, edit data using the PL/SQL or Java API. -- 1. Create the topology. (Null SRID in this example.) EXECUTE SDO_TOPO.CREATE_TOPOLOGY('CITY_DATA', 0.00005); -- 2. Load topology data (node, edge, and face tables). -- Use INSERT statements here instead of a bulk-load utility. -- 2A. Insert data into _EDGE$ table. -- E1 INSERT INTO city_data_edge$ (edge_id, start_node_id, end_node_id, next_left_edge_id, prev_left_edge_id, next_right_edge_id, prev_right_edge_id, left_face_id, right_face_id, geometry) VALUES(1, 1, 1, 1, 1, -1, -1, 1, -1, SDO_GEOMETRY(2002, NULL, NULL, SDO_ELEM_INFO_ARRAY(1, 2, 1), SDO_ORDINATE_ARRAY(8,30, 16,30, 16,38, 3,38, 3,30, 8,30))); -- E2 INSERT INTO city_data_edge$ (edge_id, start_node_id, end_node_id, next_left_edge_id, prev_left_edge_id, next_right_edge_id, prev_right_edge_id, left_face_id, right_face_id, geometry) VALUES(2, 2, 2, 3, -3, -2, -2, 2, -1, SDO_GEOMETRY(2002, NULL, NULL, SDO_ELEM_INFO_ARRAY(1, 2, 1), SDO_ORDINATE_ARRAY(25,30, 31,30, 31,40, 17,40, 17,30, 25,30))); -- E3 INSERT INTO city_data_edge$ (edge_id, start_node_id, end_node_id, next_left_edge_id, prev_left_edge_id, next_right_edge_id, prev_right_edge_id, left_face_id, right_face_id, geometry) VALUES(3, 2, 3, -3, 2, 2, 3, 2, 2, SDO_GEOMETRY(2002, NULL, NULL, SDO_ELEM_INFO_ARRAY(1, 2, 1), SDO_ORDINATE_ARRAY(25,30, 25,35))); -- E4 INSERT INTO city_data_edge$ (edge_id, start_node_id, end_node_id, next_left_edge_id, prev_left_edge_id, next_right_edge_id, prev_right_edge_id, left_face_id, right_face_id, geometry) VALUES(4, 5, 6, -5, -4, 4, 5, -1, -1, SDO_GEOMETRY(2002, NULL, NULL, SDO_ELEM_INFO_ARRAY(1, 2, 1), SDO_ORDINATE_ARRAY(36,38, 38,35, 41,34, 42,33, 45,32, 47,28, 50,28, 52,32, 57,33))); -- E5 INSERT INTO city_data_edge$ (edge_id, start_node_id, end_node_id, next_left_edge_id, prev_left_edge_id, next_right_edge_id, prev_right_edge_id, left_face_id, right_face_id, geometry) VALUES(5, 7, 6, -4, -5, 5, 4, -1, -1, SDO_GEOMETRY(2002, NULL, NULL, SDO_ELEM_INFO_ARRAY(1, 2, 1), SDO_ORDINATE_ARRAY(41,40, 45,40, 47,42, 62,41, 61,38, 59,39, 57,36, 57,33))); -- E6 INSERT INTO city_data_edge$ (edge_id, start_node_id, end_node_id, next_left_edge_id, prev_left_edge_id, next_right_edge_id, prev_right_edge_id, left_face_id, right_face_id, geometry) VALUES(6, 16, 17, 7, 21, -21, 19, -1, 3, SDO_GEOMETRY(2002, NULL, NULL, SDO_ELEM_INFO_ARRAY(1, 2, 1), SDO_ORDINATE_ARRAY(9,22, 21,22))); Topology Data Model Overview 1-35 Topology Examples (PL/SQL) -- E7 INSERT INTO city_data_edge$ (edge_id, start_node_id, end_node_id, next_left_edge_id, prev_left_edge_id, next_right_edge_id, prev_right_edge_id, left_face_id, right_face_id, geometry) VALUES(7, 17, 18, 8, 6, -19, 17, -1, 4, SDO_GEOMETRY(2002, NULL, NULL, SDO_ELEM_INFO_ARRAY(1, 2, 1), SDO_ORDINATE_ARRAY(21,22, 35,22))); -- E8 INSERT INTO city_data_edge$ (edge_id, start_node_id, end_node_id, next_left_edge_id, prev_left_edge_id, next_right_edge_id, prev_right_edge_id, left_face_id, right_face_id, geometry) VALUES(8, 18, 19, -15, 7, -17, 15, -1, 5, SDO_GEOMETRY(2002, NULL, NULL, SDO_ELEM_INFO_ARRAY(1, 2, 1), SDO_ORDINATE_ARRAY(35,22, 47,22))); -- E9 INSERT INTO city_data_edge$ (edge_id, start_node_id, end_node_id, next_left_edge_id, prev_left_edge_id, next_right_edge_id, prev_right_edge_id, left_face_id, right_face_id, geometry) VALUES(9, 15, 14, 19, -21, -22, 20, 3, 6, SDO_GEOMETRY(2002, NULL, NULL, SDO_ELEM_INFO_ARRAY(1, 2, 1), SDO_ORDINATE_ARRAY(9,14, 21,14))); -- E10 INSERT INTO city_data_edge$ (edge_id, start_node_id, end_node_id, next_left_edge_id, prev_left_edge_id, next_right_edge_id, prev_right_edge_id, left_face_id, right_face_id, geometry) VALUES(10, 13, 14, -20, 18, 17, -19, 7, 4, SDO_GEOMETRY(2002, NULL, NULL, SDO_ELEM_INFO_ARRAY(1, 2, 1), SDO_ORDINATE_ARRAY(35,14, 21,14))); -- E11 INSERT INTO city_data_edge$ (edge_id, start_node_id, end_node_id, next_left_edge_id, prev_left_edge_id, next_right_edge_id, prev_right_edge_id, left_face_id, right_face_id, geometry) VALUES(11, 13, 12, 15, -17, -18, 16, 5, 8, SDO_GEOMETRY(2002, NULL, NULL, SDO_ELEM_INFO_ARRAY(1, 2, 1), SDO_ORDINATE_ARRAY(35,14, 47,14))); -- E12 INSERT INTO city_data_edge$ (edge_id, start_node_id, end_node_id, next_left_edge_id, prev_left_edge_id, next_right_edge_id, prev_right_edge_id, left_face_id, right_face_id, geometry) VALUES(12, 8, 9, 20, -22, 22, -13, 6, -1, SDO_GEOMETRY(2002, NULL, NULL, SDO_ELEM_INFO_ARRAY(1, 2, 1), SDO_ORDINATE_ARRAY(9,6, 21,6))); -- E13 INSERT INTO city_data_edge$ (edge_id, start_node_id, end_node_id, next_left_edge_id, prev_left_edge_id, next_right_edge_id, prev_right_edge_id, left_face_id, right_face_id, geometry) VALUES(13, 9, 10, 18, -20, -12, -14, 7, -1, SDO_GEOMETRY(2002, NULL, NULL, SDO_ELEM_INFO_ARRAY(1, 2, 1), SDO_ORDINATE_ARRAY(21,6, 35,6))); -- E14 INSERT INTO city_data_edge$ (edge_id, start_node_id, end_node_id, next_left_edge_id, prev_left_edge_id, next_right_edge_id, prev_right_edge_id, left_face_id, right_face_id, geometry) VALUES(14, 10, 11, 16, -18, -13, -16, 8, -1, SDO_GEOMETRY(2002, NULL, NULL, SDO_ELEM_INFO_ARRAY(1, 2, 1), SDO_ORDINATE_ARRAY(35,6, 47,6))); -- E15 INSERT INTO city_data_edge$ (edge_id, start_node_id, end_node_id, next_left_edge_id, prev_left_edge_id, next_right_edge_id, prev_right_edge_id, left_face_id, right_face_id, geometry) 1-36 Oracle Spatial Topology and Network Data Models Topology Examples (PL/SQL) VALUES(15, 12, 19, -8, 11, -16, 8, 5, -1, SDO_GEOMETRY(2002, NULL, NULL, SDO_ELEM_INFO_ARRAY(1, 2, 1), SDO_ORDINATE_ARRAY(47,14, 47,22))); -- E16 INSERT INTO city_data_edge$ (edge_id, start_node_id, end_node_id, next_left_edge_id, prev_left_edge_id, next_right_edge_id, prev_right_edge_id, left_face_id, right_face_id, geometry) VALUES(16, 11, 12, -11, 14, -14, -15, 8, -1, SDO_GEOMETRY(2002, NULL, NULL, SDO_ELEM_INFO_ARRAY(1, 2, 1), SDO_ORDINATE_ARRAY(47,6, 47,14))); -- E17 INSERT INTO city_data_edge$ (edge_id, start_node_id, end_node_id, next_left_edge_id, prev_left_edge_id, next_right_edge_id, prev_right_edge_id, left_face_id, right_face_id, geometry) VALUES(17, 13, 18, -7, -10, 11, -8, 4, 5, SDO_GEOMETRY(2002, NULL, NULL, SDO_ELEM_INFO_ARRAY(1, 2, 1), SDO_ORDINATE_ARRAY(35,14, 35,22))); -- E18 INSERT INTO city_data_edge$ (edge_id, start_node_id, end_node_id, next_left_edge_id, prev_left_edge_id, next_right_edge_id, prev_right_edge_id, left_face_id, right_face_id, geometry) VALUES(18, 10, 13, 10, 13, 14, -11, 7, 8, SDO_GEOMETRY(2002, NULL, NULL, SDO_ELEM_INFO_ARRAY(1, 2, 1), SDO_ORDINATE_ARRAY(35,6, 35,14))); -- E19 INSERT INTO city_data_edge$ (edge_id, start_node_id, end_node_id, next_left_edge_id, prev_left_edge_id, next_right_edge_id, prev_right_edge_id, left_face_id, right_face_id, geometry) VALUES(19, 14, 17, -6, 9, -10, -7, 3, 4, SDO_GEOMETRY(2002, NULL, NULL, SDO_ELEM_INFO_ARRAY(1, 2, 1), SDO_ORDINATE_ARRAY(21,14, 21,22))); -- E20 INSERT INTO city_data_edge$ (edge_id, start_node_id, end_node_id, next_left_edge_id, prev_left_edge_id, next_right_edge_id, prev_right_edge_id, left_face_id, right_face_id, geometry) VALUES(20, 9, 14, -9, 12, 13, 10, 6, 7, SDO_GEOMETRY(2002, NULL, NULL, SDO_ELEM_INFO_ARRAY(1, 2, 1), SDO_ORDINATE_ARRAY(21,6, 21,14))); -- E21 INSERT INTO city_data_edge$ (edge_id, start_node_id, end_node_id, next_left_edge_id, prev_left_edge_id, next_right_edge_id, prev_right_edge_id, left_face_id, right_face_id, geometry) VALUES(21, 15, 16, 6, 22, 9, -6, -1, 3, SDO_GEOMETRY(2002, NULL, NULL, SDO_ELEM_INFO_ARRAY(1, 2, 1), SDO_ORDINATE_ARRAY(9,14, 9,22))); -- E22 INSERT INTO city_data_edge$ (edge_id, start_node_id, end_node_id, next_left_edge_id, prev_left_edge_id, next_right_edge_id, prev_right_edge_id, left_face_id, right_face_id, geometry) VALUES(22, 8, 15, 21, -12, 12, -9, -1, 6, SDO_GEOMETRY(2002, NULL, NULL, SDO_ELEM_INFO_ARRAY(1, 2, 1), SDO_ORDINATE_ARRAY(9,6, 9,14))); -- E25 INSERT INTO city_data_edge$ (edge_id, start_node_id, end_node_id, next_left_edge_id, prev_left_edge_id, next_right_edge_id, prev_right_edge_id, left_face_id, right_face_id, geometry) VALUES(25, 21, 22, -25, -25, 25, 25, 1, 1, SDO_GEOMETRY(2002, NULL, NULL, SDO_ELEM_INFO_ARRAY(1, 2, 1), SDO_ORDINATE_ARRAY(9,35, 13,35))); -- E26 Topology Data Model Overview 1-37 Topology Examples (PL/SQL) INSERT INTO city_data_edge$ (edge_id, start_node_id, end_node_id, next_left_edge_id, prev_left_edge_id, next_right_edge_id, prev_right_edge_id, left_face_id, right_face_id, geometry) VALUES(26, 20, 20, 26, 26, -26, -26, 9, 1, SDO_GEOMETRY(2002, NULL, NULL, SDO_ELEM_INFO_ARRAY(1, 2, 1), SDO_ORDINATE_ARRAY(4,31, 7,31, 7,34, 4,34, 4,31))); -- 2B. Insert data into _NODE$ table. -- N1 INSERT INTO city_data_node$ (node_id, edge_id, face_id, geometry) VALUES(1, 1, NULL, SDO_GEOMETRY(2001, NULL, SDO_POINT_TYPE(8,30,NULL), NULL, NULL)); -- N2 INSERT INTO city_data_node$ (node_id, edge_id, face_id, geometry) VALUES(2, 2, NULL, SDO_GEOMETRY(2001, NULL, SDO_POINT_TYPE(25,30,NULL), NULL, NULL)); -- N3 INSERT INTO city_data_node$ (node_id, edge_id, face_id, geometry) VALUES(3, -3, NULL, SDO_GEOMETRY(2001, NULL, SDO_POINT_TYPE(25,35,NULL), NULL, NULL)); -- N4 INSERT INTO city_data_node$ (node_id, edge_id, face_id, geometry) VALUES(4, NULL, 2, SDO_GEOMETRY(2001, NULL, SDO_POINT_TYPE(20,37,NULL), NULL, NULL)); -- N5 INSERT INTO city_data_node$ (node_id, edge_id, face_id, geometry) VALUES(5, 4, NULL, SDO_GEOMETRY(2001, NULL, SDO_POINT_TYPE(36,38,NULL), NULL, NULL)); -- N6 INSERT INTO city_data_node$ (node_id, edge_id, face_id, geometry) VALUES(6, -4, NULL, SDO_GEOMETRY(2001, NULL, SDO_POINT_TYPE(57,33,NULL), NULL, NULL)); -- N7 INSERT INTO city_data_node$ (node_id, edge_id, face_id, geometry) VALUES(7, 5, NULL, SDO_GEOMETRY(2001, NULL, SDO_POINT_TYPE(41,40,NULL), NULL, NULL)); -- N8 INSERT INTO city_data_node$ (node_id, edge_id, face_id, geometry) VALUES(8, 12, NULL, SDO_GEOMETRY(2001, NULL, SDO_POINT_TYPE(9,6,NULL), NULL, NULL)); -- N9 INSERT INTO city_data_node$ (node_id, edge_id, face_id, geometry) VALUES(9, 20, NULL, SDO_GEOMETRY(2001, NULL, SDO_POINT_TYPE(21,6,NULL), NULL, NULL)); -- N10 INSERT INTO city_data_node$ (node_id, edge_id, face_id, geometry) VALUES(10, 18, NULL, SDO_GEOMETRY(2001, NULL, SDO_POINT_TYPE(35,6,NULL), NULL, NULL)); -- N11 INSERT INTO city_data_node$ (node_id, edge_id, face_id, geometry) VALUES(11, -14, NULL, SDO_GEOMETRY(2001, NULL, SDO_POINT_TYPE(47,6,NULL), NULL, NULL)); -- N12 INSERT INTO city_data_node$ (node_id, edge_id, face_id, geometry) VALUES(12, 15, NULL, SDO_GEOMETRY(2001, NULL, SDO_POINT_TYPE(47,14,NULL), NULL, NULL)); -- N13 INSERT INTO city_data_node$ (node_id, edge_id, face_id, geometry) VALUES(13, 17, NULL, 1-38 Oracle Spatial Topology and Network Data Models Topology Examples (PL/SQL) SDO_GEOMETRY(2001, NULL, SDO_POINT_TYPE(35,14,NULL), NULL, NULL)); -- N14 INSERT INTO city_data_node$ (node_id, edge_id, face_id, geometry) VALUES(14, 19, NULL, SDO_GEOMETRY(2001, NULL, SDO_POINT_TYPE(21,14,NULL), NULL, NULL)); -- N15 INSERT INTO city_data_node$ (node_id, edge_id, face_id, geometry) VALUES(15, 21, NULL, SDO_GEOMETRY(2001, NULL, SDO_POINT_TYPE(9,14,NULL), NULL, NULL)); -- N16 INSERT INTO city_data_node$ (node_id, edge_id, face_id, geometry) VALUES(16, 6, NULL, SDO_GEOMETRY(2001, NULL, SDO_POINT_TYPE(9,22,NULL), NULL, NULL)); -- N17 INSERT INTO city_data_node$ (node_id, edge_id, face_id, geometry) VALUES(17, 7, NULL, SDO_GEOMETRY(2001, NULL, SDO_POINT_TYPE(21,22,NULL), NULL, NULL)); -- N18 INSERT INTO city_data_node$ (node_id, edge_id, face_id, geometry) VALUES(18, 8, NULL, SDO_GEOMETRY(2001, NULL, SDO_POINT_TYPE(35,22,NULL), NULL, NULL)); -- N19 INSERT INTO city_data_node$ (node_id, edge_id, face_id, geometry) VALUES(19, -15, NULL, SDO_GEOMETRY(2001, NULL, SDO_POINT_TYPE(47,22,NULL), NULL, NULL)); -- N20 INSERT INTO city_data_node$ (node_id, edge_id, face_id, geometry) VALUES(20, 26, NULL, SDO_GEOMETRY(2001, NULL, SDO_POINT_TYPE(4,31,NULL), NULL, NULL)); -- N21 INSERT INTO city_data_node$ (node_id, edge_id, face_id, geometry) VALUES(21, 25, NULL, SDO_GEOMETRY(2001, NULL, SDO_POINT_TYPE(9,35,NULL), NULL, NULL)); -- N22 INSERT INTO city_data_node$ (node_id, edge_id, face_id, geometry) VALUES(22, -25, NULL, SDO_GEOMETRY(2001, NULL, SDO_POINT_TYPE(13,35,NULL), NULL, NULL)); -- 2C. Insert data into _FACE$ table. -- F0 (id = -1, not 0) INSERT INTO city_data_face$ (face_id, boundary_edge_id, island_edge_id_list, island_node_id_list, mbr_geometry) VALUES(-1, NULL, SDO_LIST_TYPE(-1, -2, 4, 6), SDO_LIST_TYPE(), NULL); -- F1 INSERT INTO city_data_face$ (face_id, boundary_edge_id, island_edge_id_list, island_node_id_list, mbr_geometry) VALUES(1, 1, SDO_LIST_TYPE(25, -26), SDO_LIST_TYPE(), SDO_GEOMETRY(2003, NULL, NULL, SDO_ELEM_INFO_ARRAY(1,1003,3), SDO_ORDINATE_ARRAY(3,30, 15,38))); -- F2 INSERT INTO city_data_face$ (face_id, boundary_edge_id, island_edge_id_list, island_node_id_list, mbr_geometry) VALUES(2, 2, SDO_LIST_TYPE(), SDO_LIST_TYPE(4), SDO_GEOMETRY(2003, NULL, NULL, SDO_ELEM_INFO_ARRAY(1,1003,3), SDO_ORDINATE_ARRAY(17,30, 31,40))); -- F3 INSERT INTO city_data_face$ (face_id, boundary_edge_id, island_edge_id_list, island_node_id_list, mbr_geometry) Topology Data Model Overview 1-39 Topology Examples (PL/SQL) VALUES(3, 19, SDO_LIST_TYPE(), SDO_LIST_TYPE(), SDO_GEOMETRY(2003, NULL, NULL, SDO_ELEM_INFO_ARRAY(1,1003,3), SDO_ORDINATE_ARRAY(9,14, 21,22))); -- F4 INSERT INTO city_data_face$ (face_id, boundary_edge_id, island_edge_id_list, island_node_id_list, mbr_geometry) VALUES(4, 17, SDO_LIST_TYPE(), SDO_LIST_TYPE(), SDO_GEOMETRY(2003, NULL, NULL, SDO_ELEM_INFO_ARRAY(1,1003,3), SDO_ORDINATE_ARRAY(21,14, 35,22))); -- F5 INSERT INTO city_data_face$ (face_id, boundary_edge_id, island_edge_id_list, island_node_id_list, mbr_geometry) VALUES(5, 15, SDO_LIST_TYPE(), SDO_LIST_TYPE(), SDO_GEOMETRY(2003, NULL, NULL, SDO_ELEM_INFO_ARRAY(1,1003,3), SDO_ORDINATE_ARRAY(35,14, 47,22))); -- F6 INSERT INTO city_data_face$ (face_id, boundary_edge_id, island_edge_id_list, island_node_id_list, mbr_geometry) VALUES(6, 20, SDO_LIST_TYPE(), SDO_LIST_TYPE(), SDO_GEOMETRY(2003, NULL, NULL, SDO_ELEM_INFO_ARRAY(1,1003,3), SDO_ORDINATE_ARRAY(9,6, 21,14))); -- F7 INSERT INTO city_data_face$ (face_id, boundary_edge_id, island_edge_id_list, island_node_id_list, mbr_geometry) VALUES(7, 10, SDO_LIST_TYPE(), SDO_LIST_TYPE(), SDO_GEOMETRY(2003, NULL, NULL, SDO_ELEM_INFO_ARRAY(1,1003,3), SDO_ORDINATE_ARRAY(21,6, 35,14))); -- F8 INSERT INTO city_data_face$ (face_id, boundary_edge_id, island_edge_id_list, island_node_id_list, mbr_geometry) VALUES(8, 16, SDO_LIST_TYPE(), SDO_LIST_TYPE(), SDO_GEOMETRY(2003, NULL, NULL, SDO_ELEM_INFO_ARRAY(1,1003,3), SDO_ORDINATE_ARRAY(35,6, 47,14))); -- F9 INSERT INTO city_data_face$ (face_id, boundary_edge_id, island_edge_id_list, island_node_id_list, mbr_geometry) VALUES(9,26,SDO_LIST_TYPE(), SDO_LIST_TYPE(), SDO_GEOMETRY(2003, NULL, NULL, SDO_ELEM_INFO_ARRAY(1,1003,3), SDO_ORDINATE_ARRAY(4,31, 7,34))); -- 3. Create feature tables. CREATE TABLE land_parcels ( -- Land parcels (selected faces) feature_name VARCHAR2(30) PRIMARY KEY, feature SDO_TOPO_GEOMETRY); CREATE TABLE city_streets ( -- City streets (selected edges) feature_name VARCHAR2(30) PRIMARY KEY, feature SDO_TOPO_GEOMETRY); CREATE TABLE traffic_signs ( -- Traffic signs (selected nodes) feature_name VARCHAR2(30) PRIMARY KEY, feature SDO_TOPO_GEOMETRY); -- 4. Associate feature tables with the topology. -Add the three topology geometry layers to the CITY_DATA topology. -Any order is OK. EXECUTE SDO_TOPO.ADD_TOPO_GEOMETRY_LAYER('CITY_DATA', 'LAND_PARCELS','FEATURE', 'POLYGON'); 1-40 Oracle Spatial Topology and Network Data Models Topology Examples (PL/SQL) EXECUTE SDO_TOPO.ADD_TOPO_GEOMETRY_LAYER('CITY_DATA', 'TRAFFIC_SIGNS','FEATURE', 'POINT'); EXECUTE SDO_TOPO.ADD_TOPO_GEOMETRY_LAYER('CITY_DATA', 'CITY_STREETS', 'FEATURE','LINE'); --- As a result, Spatial generates a unique TG_LAYER_ID for each layer in the topology metadata (USER/ALL_SDO_TOPO_METADATA). -- 5. Initialize topology metadata. EXECUTE SDO_TOPO.INITIALIZE_METADATA('CITY_DATA'); -- 6. Load feature tables using the SDO_TOPO_GEOMETRY constructor. -- Each topology feature can consist of one or more objects (face, edge, node) -- of an appropriate type. For example, a land parcel can consist of one face, -- or two or more faces, as specified in the SDO_TOPO_OBJECT_ARRAY. ------ There are typically fewer features than there are faces, nodes, and edges. In this example, the only features are these: Area features (land parcels): P1, P2, P3, P4, P5 Point features (traffic signs): S1, S2, S3, S4 Linear features (roads/streets): R1, R2, R3, R4 -- 6A. Load LAND_PARCELS table. -- P1 INSERT INTO land_parcels VALUES ('P1', -- Feature name SDO_TOPO_GEOMETRY( 'CITY_DATA', -- Topology name 3, -- Topology geometry type (polygon/multipolygon) 1, -- TG_LAYER_ID for this topology (from ALL_SDO_TOPO_METADATA) SDO_TOPO_OBJECT_ARRAY ( SDO_TOPO_OBJECT (3, 3), -- face_id = 3 SDO_TOPO_OBJECT (6, 3))) -- face_id = 6 ); -- P2 INSERT INTO land_parcels VALUES ('P2', -- Feature name SDO_TOPO_GEOMETRY( 'CITY_DATA', -- Topology name 3, -- Topology geometry type (polygon/multipolygon) 1, -- TG_LAYER_ID for this topology (from ALL_SDO_TOPO_METADATA) SDO_TOPO_OBJECT_ARRAY ( SDO_TOPO_OBJECT (4, 3), -- face_id = 4 SDO_TOPO_OBJECT (7, 3))) -- face_id = 7 ); -- P3 INSERT INTO land_parcels VALUES ('P3', -- Feature name SDO_TOPO_GEOMETRY( 'CITY_DATA', -- Topology name 3, -- Topology geometry type (polygon/multipolygon) 1, -- TG_LAYER_ID for this topology (from ALL_SDO_TOPO_METADATA) SDO_TOPO_OBJECT_ARRAY ( SDO_TOPO_OBJECT (5, 3), -- face_id = 5 SDO_TOPO_OBJECT (8, 3))) -- face_id = 8 ); -- P4 INSERT INTO land_parcels VALUES ('P4', -- Feature name SDO_TOPO_GEOMETRY( 'CITY_DATA', -- Topology name 3, -- Topology geometry type (polygon/multipolygon) Topology Data Model Overview 1-41 Topology Examples (PL/SQL) 1, -- TG_LAYER_ID for this topology (from ALL_SDO_TOPO_METADATA) SDO_TOPO_OBJECT_ARRAY ( SDO_TOPO_OBJECT (2, 3))) -- face_id = 2 ); -- P5 (Includes F1, but not F9.) INSERT INTO land_parcels VALUES ('P5', -- Feature name SDO_TOPO_GEOMETRY( 'CITY_DATA', -- Topology name 3, -- Topology geometry type (polygon/multipolygon) 1, -- TG_LAYER_ID for this topology (from ALL_SDO_TOPO_METADATA) SDO_TOPO_OBJECT_ARRAY ( SDO_TOPO_OBJECT (1, 3))) -- face_id = 1 ); -- 6B. Load TRAFFIC_SIGNS table. -- S1 INSERT INTO traffic_signs VALUES ('S1', -- Feature name SDO_TOPO_GEOMETRY( 'CITY_DATA', -- Topology name 1, -- Topology geometry type (point) 2, -- TG_LAYER_ID for this topology (from ALL_SDO_TOPO_METADATA) SDO_TOPO_OBJECT_ARRAY ( SDO_TOPO_OBJECT (14, 1))) -- node_id = 14 ); -- S2 INSERT INTO traffic_signs VALUES ('S2', -- Feature name SDO_TOPO_GEOMETRY( 'CITY_DATA', -- Topology name 1, -- Topology geometry type (point) 2, -- TG_LAYER_ID for this topology (from ALL_SDO_TOPO_METADATA) SDO_TOPO_OBJECT_ARRAY ( SDO_TOPO_OBJECT (13, 1))) -- node_id = 13 ); -- S3 INSERT INTO traffic_signs VALUES ('S3', -- Feature name SDO_TOPO_GEOMETRY( 'CITY_DATA', -- Topology name 1, -- Topology geometry type (point) 2, -- TG_LAYER_ID for this topology (from ALL_SDO_TOPO_METADATA) SDO_TOPO_OBJECT_ARRAY ( SDO_TOPO_OBJECT (6, 1))) -- node_id = 6 ); -- S4 INSERT INTO traffic_signs VALUES ('S4', -- Feature name SDO_TOPO_GEOMETRY( 'CITY_DATA', -- Topology name 1, -- Topology geometry type (point) 2, -- TG_LAYER_ID for this topology (from ALL_SDO_TOPO_METADATA) SDO_TOPO_OBJECT_ARRAY ( SDO_TOPO_OBJECT (4, 1))) -- node_id = 4 ); -- 6C. Load CITY_STREETS table. -- (Note: "R" in feature names is for "Road", because "S" is used for signs.) -- R1 INSERT INTO city_streets VALUES ('R1', -- Feature name SDO_TOPO_GEOMETRY( 'CITY_DATA', -- Topology name 1-42 Oracle Spatial Topology and Network Data Models Topology Examples (PL/SQL) 2, -- Topology geometry type (line string) 3, -- TG_LAYER_ID for this topology (from ALL_SDO_TOPO_METADATA) SDO_TOPO_OBJECT_ARRAY ( SDO_TOPO_OBJECT (9, 2), SDO_TOPO_OBJECT (-10, 2), SDO_TOPO_OBJECT (11, 2))) -- edge_ids = 9, -10, 11 ); -- R2 INSERT INTO city_streets VALUES ('R2', -- Feature name SDO_TOPO_GEOMETRY( 'CITY_DATA', -- Topology name 2, -- Topology geometry type (line string) 3, -- TG_LAYER_ID for this topology (from ALL_SDO_TOPO_METADATA) SDO_TOPO_OBJECT_ARRAY ( SDO_TOPO_OBJECT (4, 2), SDO_TOPO_OBJECT (-5, 2))) -- edge_ids = 4, -5 ); -- R3 INSERT INTO city_streets VALUES ('R3', -- Feature name SDO_TOPO_GEOMETRY( 'CITY_DATA', -- Topology name 2, -- Topology geometry type (line string) 3, -- TG_LAYER_ID for this topology (from ALL_SDO_TOPO_METADATA) SDO_TOPO_OBJECT_ARRAY ( SDO_TOPO_OBJECT (25, 2))) -- edge_id = 25 ); -- R4 INSERT INTO city_streets VALUES ('R4', -- Feature name SDO_TOPO_GEOMETRY( 'CITY_DATA', -- Topology name 2, -- Topology geometry type (line string) 3, -- TG_LAYER_ID for this topology (from ALL_SDO_TOPO_METADATA) SDO_TOPO_OBJECT_ARRAY ( SDO_TOPO_OBJECT (3, 2))) -- edge_id = 3 ); -- 7. Query the data. SELECT a.feature_name, a.feature.tg_id, a.feature.get_geometry() FROM land_parcels a; /* Window is city_streets */ SELECT a.feature_name, b.feature_name FROM city_streets b, land_parcels a WHERE b.feature_name like 'R%' AND sdo_anyinteract(a.feature, b.feature) = 'TRUE' ORDER BY b.feature_name, a.feature_name; -- Find all streets that have any interaction with land parcel P3. -- (Should return only R1.) SELECT c.feature_name FROM city_streets c, land_parcels l WHERE l.feature_name = 'P3' AND SDO_ANYINTERACT (c.feature, l.feature) = 'TRUE'; -- Find all land parcels that have any interaction with traffic sign S1. -- (Should return P1 and P2.) SELECT l.feature_name FROM land_parcels l, traffic_signs t WHERE t.feature_name = 'S1' AND SDO_ANYINTERACT (l.feature, t.feature) = 'TRUE'; Topology Data Model Overview 1-43 Topology Examples (PL/SQL) -- Get the geometry for land parcel P1. SELECT l.feature_name, l.feature.get_geometry() FROM land_parcels l WHERE l.feature_name = 'P1'; -- Get the boundary of face with face_id 3. SELECT SDO_TOPO.GET_FACE_BOUNDARY('CITY_DATA', 3) FROM DUAL; -- Get the topological elements for land parcel P2. -- CITY_DATA layer, land parcels (tg_ layer_id = 1), parcel P2 (tg_id = 2) SELECT SDO_TOPO.GET_TOPO_OBJECTS('CITY_DATA', 1, 2) FROM DUAL; 1.12.2 Topology Built from Spatial Geometries Example 1–13 uses a topology built from Oracle Spatial geometry data. Example 1–13 Topology Built from Spatial Geometries ------------------------------- Main steps for using the topology data model with a topology -- built from Spatial geometry data ------------------------------- 1. Create the topology. -- 2. Insert the universe face (F0). (id = -1, not 0) -- 3. Create feature tables. -- 4. Associate feature tables with the topology. -- 5. Create a TopoMap object and load the whole topology into -cache for updating. -- 6. Load feature tables, inserting data from the spatial tables and -using SDO_TOPO_MAP.CREATE_FEATURE. -- 7. Initialize topology metadata. -- 8. Query the data. -- 9. Optionally, edit the data using the PL/SQL or Java API. -------- Preliminary work for this example (things normally done to use data with Oracle Spatial): * Create the spatial tables. * Update the Spatial metadata (USER_SDO_GEOM_METADATA). * Load data into the spatial tables. * Validate the spatial data (validate the layers). * Create the spatial indexes. -- Create spatial tables of geometry features: names and geometries. CREATE TABLE city_streets_geom ( -- City streets/roads name VARCHAR2(30) PRIMARY KEY, geometry SDO_GEOMETRY); CREATE TABLE traffic_signs_geom ( -- Traffic signs name VARCHAR2(30) PRIMARY KEY, geometry SDO_GEOMETRY); CREATE TABLE land_parcels_geom ( -- Land parcels name VARCHAR2(30) PRIMARY KEY, geometry SDO_GEOMETRY); INSERT INTO user_sdo_geom_metadata (TABLE_NAME, COLUMN_NAME, DIMINFO, 1-44 Oracle Spatial Topology and Network Data Models Topology Examples (PL/SQL) SRID) VALUES ( 'CITY_STREETS_GEOM', 'GEOMETRY', SDO_DIM_ARRAY( SDO_DIM_ELEMENT('X', 0, 65, 0.005), SDO_DIM_ELEMENT('Y', 0, 45, 0.005) ), NULL -- SRID ); INSERT INTO user_sdo_geom_metadata (TABLE_NAME, COLUMN_NAME, DIMINFO, SRID) VALUES ( 'TRAFFIC_SIGNS_GEOM', 'GEOMETRY', SDO_DIM_ARRAY( SDO_DIM_ELEMENT('X', 0, 65, 0.005), SDO_DIM_ELEMENT('Y', 0, 45, 0.005) ), NULL -- SRID ); INSERT INTO user_sdo_geom_metadata (TABLE_NAME, COLUMN_NAME, DIMINFO, SRID) VALUES ( 'LAND_PARCELS_GEOM', 'GEOMETRY', SDO_DIM_ARRAY( SDO_DIM_ELEMENT('X', 0, 65, 0.005), SDO_DIM_ELEMENT('Y', 0, 45, 0.005) ), NULL -- SRID ); -- Load these tables (names and geometries for city streets/roads, -- traffic signs, and land parcels). -- Insert data into city street line geometries. -- R1 INSERT INTO city_streets_geom VALUES('R1', SDO_GEOMETRY(2002, NULL, NULL, SDO_ELEM_INFO_ARRAY(1, 2, 1), SDO_ORDINATE_ARRAY(9,14, 21,14, 35,14, 47,14))); -- R2 INSERT INTO city_streets_geom VALUES('R2', SDO_GEOMETRY(2002, NULL, NULL, SDO_ELEM_INFO_ARRAY(1, 2, 1), SDO_ORDINATE_ARRAY(36,38, 38,35, 41,34, 42,33, 45,32, 47,28, 50,28, 52,32, 57,33, 57,36, 59,39, 61,38, 62,41, 47,42, 45,40, 41,40))); -- R3 INSERT INTO city_streets_geom VALUES('R3', SDO_GEOMETRY(2002, NULL, NULL, SDO_ELEM_INFO_ARRAY(1, 2, 1), Topology Data Model Overview 1-45 Topology Examples (PL/SQL) SDO_ORDINATE_ARRAY(9,35, 13,35))); -- R4 INSERT INTO city_streets_geom VALUES('R4', SDO_GEOMETRY(2002, NULL, NULL, SDO_ELEM_INFO_ARRAY(1, 2, 1), SDO_ORDINATE_ARRAY(25,30, 25,35))); -- Insert data into traffic sign point geometries. -- S1 INSERT INTO traffic_signs_geom VALUES('S1', SDO_GEOMETRY(2001, NULL, SDO_POINT_TYPE(21,14,NULL), NULL, NULL)); -- S2 INSERT INTO traffic_signs_geom VALUES('S2', SDO_GEOMETRY(2001, NULL, SDO_POINT_TYPE(35,14,NULL), NULL, NULL)); -- S3 INSERT INTO traffic_signs_geom VALUES('S3', SDO_GEOMETRY(2001, NULL, SDO_POINT_TYPE(57,33,NULL), NULL, NULL)); -- S4 INSERT INTO traffic_signs_geom VALUES('S4', SDO_GEOMETRY(2001, NULL, SDO_POINT_TYPE(20,37,NULL), NULL, NULL)); -- Insert data into land parcel polygon geometries. -- P1 INSERT INTO land_parcels_geom VALUES('P1', SDO_GEOMETRY(2003, NULL, NULL, SDO_ELEM_INFO_ARRAY(1, 1003, 1), SDO_ORDINATE_ARRAY(9,6, 21,6, 21,14, 21,22, 9,22, 9,14, 9,6))); -- P2 INSERT INTO land_parcels_geom VALUES('P2', SDO_GEOMETRY(2003, NULL, NULL, SDO_ELEM_INFO_ARRAY(1,1003,1), SDO_ORDINATE_ARRAY(21,6, 35,6, 35,14, 35,22, 21,22, 21,14, 21,6))); -- P3 INSERT INTO land_parcels_geom VALUES('P3', SDO_GEOMETRY(2003, NULL, NULL, SDO_ELEM_INFO_ARRAY(1,1003,1), SDO_ORDINATE_ARRAY(35,6, 47,6, 47,14, 47,22, 35,22, 35,14, 35,6))); -- P4 INSERT INTO land_parcels_geom VALUES('P4', SDO_GEOMETRY(2003, NULL, NULL, SDO_ELEM_INFO_ARRAY(1,1003,1), SDO_ORDINATE_ARRAY(17,30, 31,30, 31,40, 17,40, 17,30))); -- P5 (polygon with a hole; exterior ring and one interior ring) INSERT INTO land_parcels_geom VALUES('P5', SDO_GEOMETRY(2003, NULL, NULL, SDO_ELEM_INFO_ARRAY(1,1003,1, 11,2003,1), SDO_ORDINATE_ARRAY(3,30, 16,30, 16,38, 3,38, 3,30, 4,31, 4,34, 7,34, 7,31, 4,31))); -- Validate the layers. create table val_results (sdo_rowid ROWID, result VARCHAR2(2000)); call SDO_GEOM.VALIDATE_LAYER_WITH_CONTEXT('CITY_STREETS_GEOM','GEOMETRY','VAL_ RESULTS'); SELECT * from val_results; truncate table val_results; call SDO_GEOM.VALIDATE_LAYER_WITH_CONTEXT('TRAFFIC_SIGNS_GEOM','GEOMETRY','VAL_ 1-46 Oracle Spatial Topology and Network Data Models Topology Examples (PL/SQL) RESULTS'); SELECT * from val_results; truncate table val_results; call SDO_GEOM.VALIDATE_LAYER_WITH_CONTEXT('LAND_PARCELS_GEOM','GEOMETRY','VAL_ RESULTS'); SELECT * from val_results; drop table val_results; -- Create the spatial indexes. CREATE INDEX city_streets_geom_idx ON city_streets_geom(geometry) INDEXTYPE IS MDSYS.SPATIAL_INDEX; CREATE INDEX traffic_signs_geom_idx ON traffic_signs_geom(geometry) INDEXTYPE IS MDSYS.SPATIAL_INDEX; CREATE INDEX land_parcels_geom_idx ON land_parcels_geom(geometry) INDEXTYPE IS MDSYS.SPATIAL_INDEX; -- Start the main steps for using the topology data model with a -- topology built from Spatial geometry data. -- 1. Create the topology. (Null SRID in this example.) EXECUTE SDO_TOPO.CREATE_TOPOLOGY('CITY_DATA', 0.00005); -- 2. Insert the universe face (F0). (id = -1, not 0) INSERT INTO CITY_DATA_FACE$ values ( -1, NULL, SDO_LIST_TYPE(), SDO_LIST_TYPE(), NULL); COMMIT; -- 3. Create feature tables. CREATE TABLE city_streets ( -- City streets/roads feature_name VARCHAR2(30) PRIMARY KEY, feature SDO_TOPO_GEOMETRY); CREATE TABLE traffic_signs ( -- Traffic signs feature_name VARCHAR2(30) PRIMARY KEY, feature SDO_TOPO_GEOMETRY); CREATE TABLE land_parcels ( -- Land parcels feature_name VARCHAR2(30) PRIMARY KEY, feature SDO_TOPO_GEOMETRY); -- 4. Associate feature tables with the topology. -Add the three topology geometry layers to the CITY_DATA topology. -Any order is OK. EXECUTE SDO_TOPO.ADD_TOPO_GEOMETRY_LAYER('CITY_DATA', 'CITY_STREETS', 'FEATURE','LINE'); EXECUTE SDO_TOPO.ADD_TOPO_GEOMETRY_LAYER('CITY_DATA', 'TRAFFIC_SIGNS','FEATURE', 'POINT'); EXECUTE SDO_TOPO.ADD_TOPO_GEOMETRY_LAYER('CITY_DATA', 'LAND_PARCELS','FEATURE', 'POLYGON'); --- As a result, Spatial generates a unique TG_LAYER_ID for each layer in the topology metadata (USER/ALL_SDO_TOPO_METADATA). -- 5. Create a TopoMap object and load the whole topology into cache for updating. EXECUTE SDO_TOPO_MAP.CREATE_TOPO_MAP('CITY_DATA', 'CITY_DATA_TOPOMAP'); EXECUTE SDO_TOPO_MAP.LOAD_TOPO_MAP('CITY_DATA_TOPOMAP', 'true'); Topology Data Model Overview 1-47 Topology Examples (PL/SQL) -- 6. Load feature tables, inserting data from the spatial tables and -using SDO_TOPO_MAP.CREATE_FEATURE. BEGIN FOR street_rec IN (SELECT name, geometry FROM city_streets_geom) LOOP INSERT INTO city_streets VALUES(street_rec.name, SDO_TOPO_MAP.CREATE_FEATURE('CITY_DATA', 'CITY_STREETS', 'FEATURE', street_rec.geometry)); END LOOP; FOR sign_rec IN (SELECT name, geometry FROM traffic_signs_geom) LOOP INSERT INTO traffic_signs VALUES(sign_rec.name, SDO_TOPO_MAP.CREATE_FEATURE('CITY_DATA', 'TRAFFIC_SIGNS', 'FEATURE', sign_rec.geometry)); END LOOP; FOR parcel_rec IN (SELECT name, geometry FROM land_parcels_geom) LOOP INSERT INTO land_parcels VALUES(parcel_rec.name, SDO_TOPO_MAP.CREATE_FEATURE('CITY_DATA', 'LAND_PARCELS', 'FEATURE', parcel_rec.geometry)); END LOOP; END; / CALL SDO_TOPO_MAP.COMMIT_TOPO_MAP(); CALL SDO_TOPO_MAP.DROP_TOPO_MAP('CITY_DATA_TOPOMAP'); -- 7. Initialize topology metadata. EXECUTE SDO_TOPO.INITIALIZE_METADATA('CITY_DATA'); -- 8. Query the data. SELECT a.feature_name, a.feature.tg_id, a.feature.get_geometry() FROM land_parcels a; SELECT a.feature_name, a.feature.tg_id, a.feature.get_geometry() FROM city_streets a; SELECT a.feature_name, a.feature.tg_id, a.feature.get_geometry() FROM traffic_signs a; SELECT sdo_topo.get_face_boundary('CITY_DATA', face_id), face_id FROM city_data_face$; SELECT sdo_topo.get_face_boundary('CITY_DATA', face_id), face_id FROM city_data_face$; SELECT sdo_topo.get_face_boundary('CITY_DATA', face_id, 'TRUE'), face_id FROM city_data_face$; -- Get topological elements. SELECT a.FEATURE_NAME, sdo_topo.get_topo_objects('CITY_DATA', a.feature.TG_LAYER_ID, a.feature.TG_ID) FROM land_parcels a; SELECT a.FEATURE_NAME, sdo_topo.get_topo_objects('CITY_DATA', a.feature.TG_LAYER_ID, a.feature.TG_ID) FROM city_streets a; 1-48 Oracle Spatial Topology and Network Data Models Topology Examples (PL/SQL) SELECT a.FEATURE_NAME, sdo_topo.get_topo_objects('CITY_DATA', a.feature.TG_LAYER_ID, a.feature.TG_ID) FROM traffic_signs a; SELECT sdo_topo.get_topo_objects('CITY_DATA', sdo_geometry(2003,null, null, sdo_elem_info_array(1,1003,3), sdo_ordinate_array(1,1, 20,20))) FROM DUAL; SELECT sdo_topo.get_topo_objects('CITY_DATA', sdo_geometry(2003,null, null, sdo_elem_info_array(1,1003,3), sdo_ordinate_array(17,30, 31,40))) FROM DUAL; -- Find all city streets interacting with a query window. SELECT c.feature_name FROM city_streets c WHERE SDO_ANYINTERACT( c.feature, SDO_GEOMETRY(2003, NULL, NULL, SDO_ELEM_INFO_ARRAY(1, 1003, 3), SDO_ORDINATE_ARRAY(5,5, 30,40))) = 'TRUE'; -- Find all streets that have any interaction with land parcel P3. -- (Should return only R1.) SELECT c.feature_name FROM city_streets c, land_parcels l WHERE l.feature_name = 'P3' AND SDO_ANYINTERACT (c.feature, l.feature) = 'TRUE'; -- Find all land parcels that have any interaction with traffic sign S1. -- (Should return P1 and P2.) SELECT l.feature_name FROM land_parcels l, traffic_signs t WHERE t.feature_name = 'S1' AND SDO_ANYINTERACT (l.feature, t.feature) = 'TRUE'; -- Get the geometry for land parcel P1. SELECT l.feature_name, l.feature.get_geometry() FROM land_parcels l WHERE l.feature_name = 'P1'; -- Query SDO_TOPO_GEOMETRY attributes, SELECT s.feature.tg_type FROM city_streets s; SELECT s.feature.tg_id FROM city_streets s; SELECT s.feature.tg_layer_id FROM city_streets s; SELECT s.feature.topology_id FROM city_streets s; -- Topology-specific functions -- Get the boundary of face with face_id 3. SELECT SDO_TOPO.GET_FACE_BOUNDARY('CITY_DATA', -- Try 'TRUE' as third parameter. SELECT SDO_TOPO.GET_FACE_BOUNDARY('CITY_DATA', -- Get the boundary of face with face_id 2. SELECT SDO_TOPO.GET_FACE_BOUNDARY('CITY_DATA', -- Try 'TRUE' as third parameter. SELECT SDO_TOPO.GET_FACE_BOUNDARY('CITY_DATA', -- Get the boundary of face with face_id 1. SELECT SDO_TOPO.GET_FACE_BOUNDARY('CITY_DATA', -- Specify 'TRUE' for the all_edges parameter. SELECT SDO_TOPO.GET_FACE_BOUNDARY('CITY_DATA', 3) FROM DUAL; 3, 'TRUE') FROM DUAL; 2) FROM DUAL; 2, 'TRUE') FROM DUAL; 1) FROM DUAL; 1, 'TRUE') FROM DUAL; Topology Data Model Overview 1-49 README File for Spatial and Related Features -- CITY_DATA layer, land parcels (tg_ layer_id = 1), parcel P2 (tg_id = 2) SELECT SDO_TOPO.GET_TOPO_OBJECTS('CITY_DATA', 1, 2) FROM DUAL; -- 10. Optionally, edit the data using the PL/SQL or Java API. 1.13 README File for Spatial and Related Features A README.txt file supplements the information in the following manuals: Oracle Spatial User's Guide and Reference, Oracle Spatial GeoRaster, and Oracle Spatial Topology and Network Data Models (this manual). This file is located at: $ORACLE_HOME/md/doc/README.txt 1-50 Oracle Spatial Topology and Network Data Models 2 Editing Topologies This chapter explains how to edit node and edge data in a topology. The operations include adding, moving, and removing nodes and edges, and updating the coordinates of an edge. This chapter explains two approaches to editing topology data, and it explains why one approach (creating and using a special cache) is better in most cases. It also describes the behavior and implications of some major types of editing operations. It contains the following major sections: ■ Section 2.1, "Approaches for Editing Topology Data" ■ Section 2.2, "Performing Operations on Nodes" ■ Section 2.3, "Performing Operations on Edges" The explanations in this chapter refer mainly to the PL/SQL application programming interface (API) provided in the MDSYS.SDO_TOPO_MAP package, which is documented in Chapter 4. However, you can also perform topology editing operations using the client-side Java API, which is introduced in Section 1.8.2 and is explained in the Javadoc-generated documentation. To edit topology data, always use the PL/SQL or Java API. Do not try to perform editing operations by directly modifying the node, edge, or face information tables. For cross-schema topology editing considerations, see Section 1.10.2. 2.1 Approaches for Editing Topology Data Whenever you need to edit a topology, you can use PL/SQL or Java API. In both cases, Oracle Spatial uses an in-memory topology cache, specifically, a TopoMap object (described in Section 2.1.1): ■ ■ If you use the PL/SQL API, you can either explicitly create and use the cache or allow Spatial to create and use the cache automatically. If you use the Java API, you must explicitly create and use the cache. Allowing Spatial to create and manage the cache automatically is simpler, because it involves fewer steps than creating and using a cache. However, because allowing Spatial to create and manage the cache involves more database activity and disk accesses, it is less efficient when you need to edit more than a few topological elements. Editing Topologies 2-1 Approaches for Editing Topology Data 2.1.1 TopoMap Objects A TopoMap object is associated with an in-memory cache that is associated with a topology. If you explicitly create and use a cache for editing a topology, you must create a TopoMap object to be associated with a topology, load all or some of the topology into the cache, edit objects, periodically update the topology to write changes to the database, commit the changes made in the cache, and clear the cache. Although this approach involves more steps than allowing Spatial to create and use the cache automatically, it is much faster and more efficient for most topology editing sessions, which typically affect hundreds or thousands of topological elements. It is the approach shown in most explanations and illustrations. A TopoMap object can be updatable or read-only, depending on the value of the allow_updates parameter when you call the SDO_TOPO_MAP.LOAD_TOPO_MAP function or procedure: ■ ■ With a read-only TopoMap object, topological elements (primitives) are loaded but not locked. With an updatable TopoMap object, topological elements (primitives) are loaded and locked. If you specified a rectangular window for an updatable TopoMap object, you can edit only those topological elements inside the specified window. (The TopoMap object may also contain locked topological elements that you cannot edit directly, but that Oracle Spatial can modify indirectly as needed.) For more information about what occurs when you use an updatable TopoMap object, see the Usage Notes for the SDO_TOPO_MAP.LOAD_TOPO_MAP function or procedure. The following procedures set an updatable TopoMap object to be read-only: ■ SDO_TOPO_MAP.COMMIT_TOPO_MAP ■ SDO_TOPO_MAP.ROLLBACK_TOPO_MAP ■ SDO_TOPO_MAP.CLEAR_TOPO_MAP Within a user session at any given time, there can be no more than one updatable TopoMap object. However, multiple different user sessions can work with updatable TopoMap objects based on the same topology, as long as their editing windows do not contain any topological elements that are in any other updatable TopoMap objects. There can be multiple read-only TopoMap objects within and across user sessions. Two or more users can edit a topology at the same time as long as their editing windows (specified in the call to the SDO_TOPO_MAP.LOAD_TOPO_MAP function or procedure) do not overlap. 2.1.2 Specifying the Editing Approach with the Topology Parameter For many SDO_TOPO_MAP package functions and procedures that edit topologies, such as SDO_TOPO_MAP.ADD_NODE or SDO_TOPO_MAP.MOVE_EDGE, you indicate the approach you are using for editing by specifying either a topology name or a null value for the first parameter, which is named topology: ■ If you specify a topology name, Spatial checks to see if an updatable TopoMap object already exists in the user session; and if one does not exist, Spatial creates an internal TopoMap object, uses that cache to perform the editing operation, commits the change (or rolls back changes to the savepoint at the beginning of the process if an exception occurred), and deletes the TopoMap object. (If an updatable TopoMap object already exists, an exception is raised.) For example, the following statement removes the node with node ID value 99 from the MY_TOPO topology: 2-2 Oracle Spatial Topology and Network Data Models Approaches for Editing Topology Data CALL SDO_TOPO_MAP.REMOVE_NODE('MY_TOPO', 99); ■ If you specify a null value, Spatial checks to see if an updatable TopoMap object already exists in the user session; and if one does exist, Spatial performs the operation in the TopoMap object's cache. (If no updatable TopoMap object exists, an exception is raised.) For example, the following statement removes the node with node ID value 99 from the current updatable TopoMap object: CALL SDO_TOPO_MAP.REMOVE_NODE(null, 99); 2.1.3 Using GET_xxx Topology Functions Some SDO_TOPO_MAP package functions that get information about topologies have topology and topo_map as their first two parameters. Examples of such functions are SDO_TOPO_MAP.GET_EDGE_COORDS and SDO_TOPO_MAP.GET_NODE_ STAR. To use these functions, specify a valid value for one parameter and a null value for the other parameter, as follows: ■ If you specify a valid topology parameter value, Spatial retrieves the information for the specified topology. It creates an internal TopoMap object, uses that cache to perform the operation, and deletes the TopoMap object. For example, the following statement returns the edge coordinates of the edge with an ID value of 1 from the CITY_DATA topology: SELECT SDO_TOPO_MAP.GET_EDGE_COORDS('CITY_DATA', null, 1) FROM DUAL; ■ If you specify a null topology parameter value and a valid topo_map parameter value, Spatial uses the specified TopoMap object (which can be updatable or read-only) to retrieve the information for the specified topology. For example, the following statement returns the edge coordinates of the edge with an ID value of 1 from the CITY_DATA_TOPOMAP TopoMap object: SELECT SDO_TOPO_MAP.GET_EDGE_COORDS(null, 'CITY_DATA_TOPOMAP', 1) FROM DUAL; ■ If you specify a null or invalid value for both the topology and topo_map parameters, an exception is raised. Some SDO_TOPO_MAP package functions that get information about topology editing operations have no parameters. Examples of such functions are SDO_TOPO_ MAP.GET_FACE_ADDITIONS and SDO_TOPO_MAP.GET_NODE_CHANGES. These functions use the current updatable TopoMap object. If no updatable TopoMap object exists, an exception is raised. For example, the following statement returns an SDO_ NUMBER_ARRAY object (described in Section 1.6.7) with the node ID values of nodes that have been added to the current updatable TopoMap object: SELECT SDO_TOPO_MAP.GET_NODE_ADDITIONS FROM DUAL; 2.1.4 Process for Editing Using Cache Explicitly (PL/SQL API) Figure 2–1 shows the recommended process for editing topological elements using the PL/SQL API and explicitly using a TopoMap object and its associated cache. Editing Topologies 2-3 Approaches for Editing Topology Data Figure 2–1 Editing Topologies Using the TopoMap Object Cache (PL/SQL API) Create TopoMap object (CREATE_ TOPO_MAP) Load TopoMap object for update (LOAD_TOPO_MAP) Perform editing operations (for example, add 1000 nodes) Validate cache (VALIDATE_ TOPO_MAP) Clear cache (CLEAR_TOPO_MAP) Rebuild indexes (CREATE_EDGE_INDEX and CREATE_FACE_ INDEX) (for example, after each 100 added nodes) Update topology (UPDATE_TOPO_MAP) (for example, after each 1000 added nodes) Commit changes (COMMIT_TOPO_MAP) Remove TopoMap object (DROP_ TOPO_MAP) As Figure 2–1 shows, the basic sequence is as follows: 1. Create the TopoMap object, using the SDO_TOPO_MAP.CREATE_TOPO_MAP procedure. This creates an in-memory cache for editing objects associated with the specified topology. 2. Load the entire topology or a rectangular window from the topology into the TopoMap object cache for update, using the SDO_TOPO_MAP.LOAD_TOPO_ MAP function or procedure. You can specify that in-memory R-tree indexes be built on the edges and faces that are being loaded. These indexes use some memory resources and take some time to create and periodically rebuild; however, they significantly improve performance if you edit a large number of topological elements in the session. (They can also improve performance for queries that use a read-only TopoMap object.) 3. Perform a number of topology editing operations (for example, add 1000 nodes). Periodically, validate the cache by calling the SDO_TOPO_MAP.VALIDATE_ TOPO_MAP function. You can rebuild existing in-memory R-tree indexes on edges and faces in the TopoMap object, or create new indexes if none exist, by using the SDO_TOPO_ MAP.CREATE_EDGE_INDEX and SDO_TOPO_MAP.CREATE_FACE_INDEX procedures. For best index performance, these indexes should be rebuilt periodically when you are editing a large number of topological elements. 2-4 Oracle Spatial Topology and Network Data Models Approaches for Editing Topology Data If you want to discard edits made in the cache, call the SDO_TOPO_MAP.CLEAR_ TOPO_MAP procedure. This procedure fails if there are any uncommitted updates; otherwise, it clears the data in the cache and sets the cache to be read-only. 4. Update the topology by calling the SDO_TOPO_MAP.UPDATE_TOPO_MAP procedure. 5. Repeat Steps 3 and 4 (editing objects, validating the cache, rebuilding the R-tree indexes, and updating the topology) as often as needed, until you have finished the topology editing operations. 6. Commit the topology changes by calling the SDO_TOPO_MAP.COMMIT_TOPO_ MAP procedure. (The SDO_TOPO_MAP.COMMIT_TOPO_MAP procedure automatically performs the actions of the SDO_TOPO_MAP.UPDATE_TOPO_ MAP procedure before it commits the changes.) After the commit operation, the cache is made read-only (that is, it is no longer updatable). However, if you want to perform further editing operations using the same TopoMap object, you can load it again and use it (that is, repeat Steps 2 through 5, clearing the cache first if necessary). To perform further editing operations, clear the TopoMap object cache by calling the SDO_TOPO_MAP.CLEAR_TOPO_MAP procedure, and then go to Step 2. If you want to discard all uncommitted topology changes, you can call the SDO_ TOPO_MAP.ROLLBACK_TOPO_MAP procedure at any time. After the rollback operation, the cache is cleared. 7. Remove the TopoMap object by calling the SDO_TOPO_MAP.DROP_TOPO_MAP procedure. This procedure removes the TopoMap object and frees any resources that it had used. (If you forget to drop the TopoMap object, it will automatically be dropped when the user session ends.) This procedure also rolls back any topology changes in the cache that have not been committed. If the application terminates abnormally, all uncommitted changes to the database will be discarded. If you plan to perform a very large number of topology editing operations, you can divide the operations among several editing sessions, each of which performs Steps 1 through 7 in the preceding list. 2.1.5 Process for Editing Using the Java API Figure 2–2 shows the recommended process for editing topological elements using the client-side Java API, which is introduced in Section 1.8.2 and is explained in the Javadoc-generated documentation. The Java API requires that you create and manage a TopoMap object and its associated cache. Editing Topologies 2-5 Approaches for Editing Topology Data Figure 2–2 Editing Topologies Using the TopoMap Object Cache (Java API) Create TopoMap object Load TopoMap object for update (loadTopology or loadWindow) Perform editing operations (for example, add 1000 nodes) Clear cache (clearCache) Rebuild indexes (createEdgeIndex and createFaceIndex) (for example, after each 100 added nodes) Validate cache (validateCache) Update topology (updateTopology) (for example, after each 1000 added nodes) Commit changes (commitDB) Remove TopoMap object As Figure 2–2 shows, the basic sequence is as follows: 1. Create the TopoMap object, using a constructor of the TopoMap class, specifying a topology and a database connection. This creates an in-memory cache for editing objects associated with the specified topology. 2. Load the entire topology or a rectangular window from the topology into the TopoMap object cache for update, using the loadTopology or loadWindow method of the TopoMap class. You can specify that in-memory R-tree indexes be built on the edge and edge face that are being affected. These indexes use some memory resources and take some time to create and periodically rebuild; however, they significantly improve performance if you edit a large number of topological elements during the database connection. 3. Perform a number of topology editing operations (for example, add 1000 nodes), and update the topology by calling the updateTopology method of the TopoMap class. Periodically, validate the cache by calling the validateCache method of the TopoMap class. If you caused in-memory R-tree indexes to be created when you loaded the TopoMap object (in Step 2), you can periodically (for example, after each addition of 100 nodes) rebuild the indexes by calling the createEdgeIndex and createFaceIndex methods of the TopoMap class. For best index performance, 2-6 Oracle Spatial Topology and Network Data Models Approaches for Editing Topology Data these indexes should be rebuilt periodically when you are editing a large number of topological elements. If you do not want to update the topology but instead want to discard edits made in the cache since the last update, call the clearCache method of the TopoMap class. The clearCache method fails if there are any uncommitted updates; otherwise, it clears the data in the cache and sets the cache to be read-only. 4. Update the topology by calling the updateTopology method of the TopoMap class. 5. Repeat Steps 3 and 4 (editing objects, validating the cache, rebuilding the R-tree indexes, and updating the topology) as often as needed, until you have finished the topology editing operations. 6. Commit the topology changes by calling the commitDB method of the TopoMap class. (The commitDB method automatically calls the updateTopology method before it commits the changes.) After the commit operation, the cache is made read-only (that is, it is no longer updatable). However, if you want to perform further editing operations using the same TopoMap object, you can load it again and use it (that is, repeat Steps 2 through 5, clearing the cache first if necessary). To perform further editing operations, clear the TopoMap object cache by calling the clearCache method of the TopoMap class, and then go to Step 2. If you want to discard all uncommitted topology changes, you can call the rollbackDB method of the TopoMap class at any time. After the rollback operation, the cache is cleared. 7. Remove the TopoMap object by setting the TopoMap object to null, which makes the object available for garbage collection and frees any resources that it had used. (If you forget to remove the TopoMap object, it will automatically be garbage collected when the application ends.) If the application terminates abnormally, all uncommitted changes to the database will be discarded. If you plan to perform a very large number of topology editing operations, you can divide the operations among several editing sessions, each of which performs Steps 1 through 7 in the preceding list. 2.1.6 Error Handling for Topology Editing This section discusses the following conditions: ■ Input parameter errors ■ All exceptions 2.1.6.1 Input Parameter Errors When an SDO_TOPO_MAP PL/SQL subprogram or a public method in the TopoMap Java class is called, it validates the values of the input parameters, and it uses or creates a TopoMap object to perform the editing or read-only operation. Whenever there is an input error, an oracle.spatial.topo.TopoDataException exception is thrown. Other errors may occur when the underlying TopoMap object performs an operation. If the method is called from SQL or PL/SQL, the caller gets the following error message: ORA-29532: Java call terminated by uncaught Java exception: Editing Topologies 2-7 Performing Operations on Nodes The following PL/SQL example shows how you can handle a TopoDataException exception: DECLARE topo_data_error EXCEPTION; PRAGMA EXCEPTION_INIT(topo_data_error, -29532); BEGIN sdo_topo_map.create_topo_map(null, null, 100, 100, 100); EXCEPTION WHEN topo_data_error THEN DBMS_OUTPUT.PUT_LINE(SQLERRM); END; / The preceding example generates the following output: ORA-29532: Java call terminated by uncaught Java exception: oracle.spatial.topo.TopoDataException: invalid TopoMap name 2.1.6.2 All Exceptions The following actions are performed automatically when any exception occurs in a call to any of the following SDO_TOPO_MAP PL/SQL subprograms or their associated methods in the TopoMap Java class: SDO_TOPO_MAP.ADD_EDGE (addEdge), SDO_ TOPO_MAP.ADD_ISOLATED_NODE (addIsolatedNode), SDO_TOPO_ MAP.ADD_LOOP (addLoop), SDO_TOPO_MAP.ADD_NODE (addNode), SDO_ TOPO_MAP.ADD_POINT_GEOMETRY (addPointGeometry), SDO_TOPO_ MAP.ADD_POLYGON_GEOMETRY (addPolygonGeometry), SDO_TOPO_ MAP.CHANGE_EDGE_COORDS (changeEdgeCoords), SDO_TOPO_MAP.MOVE_ ISOLATED_NODE (moveIsolatedNode), SDO_TOPO_MAP.MOVE_NODE (moveNode), SDO_TOPO_MAP.MOVE_EDGE (moveEdge), SDO_TOPO_ MAP.REMOVE_EDGE (removeEdge), SDO_TOPO_MAP.REMOVE_NODE (removeNode), and SDO_TOPO_MAP.UPDATE_TOPO_MAP (updateTopology). ■ The transaction is rolled back. ■ The TopoMap object cache is cleared. ■ The TopoMap object is made read-only. 2.2 Performing Operations on Nodes This section contains sections that describe the effects of adding, moving, and removing nodes, and that explain how to perform these operations using the PL/SQL API. 2.2.1 Adding a Node Adding a non-isolated node adds the node to an edge at a point that is currently on the edge. This operation also splits the edge, causing the original edge to be divided into two edges. Spatial automatically adjusts the definition of the original edge and creates a new edge (assigning it an ID value that is unique among edges in the topology). To add a non-isolated node, use the SDO_TOPO_MAP.ADD_NODE function. To add an isolated node, use the SDO_TOPO_MAP.ADD_ISOLATED_NODE function. Figure 2–3 shows the addition of a node (N3) on edge E1. 2-8 Oracle Spatial Topology and Network Data Models Performing Operations on Nodes Figure 2–3 Adding a Non-Isolated Node Before Adding a Node N1 N2 E1 After Adding a Node N1 N2 N3 E1 E2 As a result of the operation shown in Figure 2–3: ■ ■ ■ Edge E1 is redefined to be between the original edge’s start point and the point at the added node (N3). Edge E2 is created. Its start point is the point at node N3, and its end point is the end point of the original edge. If any linear features were defined on the original edge, they are automatically redefined to be on both resulting edges, the edge is split, and a record is added to the history information table (explained in Section 1.5.5) for the topology. For example, if a street named Main Street had been defined on the original edge E1 in Figure 2–3, then after the addition of node N3, Main Street would be defined on both edges E1 and E2. Figure 2–4 shows a more complicated example of adding a node, where the result depends on whether or not the added node is a new shape point of the original edge (that is, on the value of the is_new_shape_point parameter to the SDO_TOPO_ MAP.ADD_NODE function). Editing Topologies 2-9 Performing Operations on Nodes Figure 2–4 Effect of is_new_shape_point Value on Adding a Node Original Edge with Shape Points N1 N2 E1 New Node Is Not a Shape Point of the Original Edge N1 N2 E2 E1 N3 New Node Is a Shape Point of the Original Edge N3 E2 N1 E1 N2 In Figure 2–4: ■ ■ ■ In the top part of the figure, the original edge (E1) starts at node N1, ends at node N2, and has two intermediate shape points. In the middle part of the figure, a new node (N3) is added that is not a shape point of the original edge, but instead is a new shape point (that is, is_new_shape_ point=>'TRUE'). The new node is added at the location specified with the point parameter, and is added after the vertex specified in the coord_index parameter (in this case, coord_index=>1 to indicate after the first vertex). The new node becomes the end node for edge E1 and the start node for the new edge E2, which ends at node N2. In the bottom part of the figure, a new node (N3) is added that is a shape point of the original edge, and is thus not a new shape point (that is, is_new_shape_ point=>'FALSE'). Because it is not a new shape point, the node is added at the vertex specified with the coord_index parameter (in this case, coord_ index=>2). As in the middle part of the figure, the new node becomes the end node for edge E1 and the start node for the new edge E2, which ends at node N2. 2.2.2 Moving a Node Moving a non-isolated node to a new position causes the ends of all edges that are attached to the node to move with the node. You must specify the vertices for all edges affected by the moving of the node; each point (start or end) that is attached to the node must have the same coordinates as the new location of the node, and the other end points (not the moved node) of each affected edge must remain the same. 2-10 Oracle Spatial Topology and Network Data Models Performing Operations on Nodes To move a non-isolated node, use the SDO_TOPO_MAP.MOVE_NODE procedure. To move an isolated node, use the SDO_TOPO_MAP.MOVE_ISOLATED_NODE procedure. Figure 2–5 shows the original topology before node N1 is moved. Figure 2–5 Topology Before Moving a Non-Isolated Node E1 E2 E3 F1 N1 E4 E9 E10 F2 F5 E6 E8 F3 E5 F4 E7 Figure 2–6 shows two cases of the original topology after node N1 is moved. In one case, no reshaping occurs; that is, all edges affected by the movement are specified as straight lines. In the other case, reshaping occurs; that is, one or more affected edges are specified as line segments with multiple vertices. Figure 2–6 Topology After Moving a Non-Isolated Node With Reshaping Without Reshaping E1 E3 E2 E9 E8 E6 F4 F3 F5 E10 E5 E7 E2 F2 N1 E9 E4 F5 E3 F1 F2 N1 F1 E10 E1 E4 E8 F3 F4 E6 E5 E7 In both cases shown in Figure 2–6: ■ ■ The topology does not change. That is, the number of nodes, edges, and faces does not change, and the relationships (such as adjacency and connectivity) among the nodes, edges, and faces do not change. All features defined on the nodes, edges, and faces retain their definitions. Any isolated nodes and edges might remain in the same face or be moved to a different face as a result of a move operation on a non-isolated node. The SDO_TOPO_ MAP.MOVE_NODE procedure has two output parameters, moved_iso_nodes and moved_iso_edges, that store the ID numbers of any isolated nodes and edges that were moved to a different face as a result of the operation. Editing Topologies 2-11 Performing Operations on Nodes A node cannot be moved if, as a result of the move, any of the following would happen: ■ ■ ■ Any edges attached to the node would intersect any other edge. For example, assume that the original topology shown in Figure 2–6 had included another edge E20 that passed just above and to the right of node N1. If the movement of node N1 would cause edge E3, E4, E6, E8, or E9 to intersect edge E20, the move operation is not performed. The node would be moved to a face that does not currently bound the node. For example, if the movement of node N1 would place it outside the original topology shown in Figure 2–6, the move operation is not performed. The node would be moved to the opposite side of an isolated face. This is not allowed because the move would change the topology by changing one or more of the following: the relationship or ordering of edges around the face, and the left and right face for each edge. Figure 2–7 shows a node movement (flipping node N1 from one side of isolated face F1 to the other side) that would not be allowed. Figure 2–7 Node Move Is Not Allowed Before Flip After Flip (Not Allowed) N1 F1 N2 N2 N3 N3 F1 F2 N1 F2 2.2.2.1 Additional Examples of Allowed and Disallowed Node Moves This section provides additional examples of node movement operations that are either allowed or not allowed. All refer to the topology shown in Figure 2–8. Figure 2–8 Topology for Node Movement Examples P1 P2 F1 E2 E5 N1 E1 E4 N2 E3 P3 P4 2-12 Oracle Spatial Topology and Network Data Models F2 Performing Operations on Nodes In the topology shown in Figure 2–8: Attempts will be made to move node N1 to points P1, P2, P3, and P4. (These points are locations but are not existing nodes.) ■ The edges have no shape points, either before or after the move operation. ■ New vertices are specified for the edges E1, E2, E3, and E4, but the ID values of the start and end points for the edges remain the same. ■ When the following node move operations are attempted using the topology shown in Figure 2–8, the following results occur: Moving node N1 to point P1: Not allowed, because one or more of the four attached edges would intersect edge E5. (Edge E3 would definitely intersect edge E5 if the move were allowed.) ■ Moving node N1 to point P2: Allowed. ■ Moving node N1 to point P3: Allowed. However, this operation causes the isolated node N2 to change from face F2 to face F1, and this might cause the application to want to roll back or disallow the movement of node N1. Similarly, if the movement of a node would cause any isolated edges or faces to change from one face to another, the application might want to roll back or disallow the node move operation. ■ Moving node N1 to point P4: Not allowed, because the node must be moved to a point in a face that bounds the original (current) position of the node. ■ 2.2.3 Removing a Node You can remove individual nodes (isolated or non-isolated), as explained in this section, and you can remove all obsolete nodes in a topology, as explained in Section 2.2.4. Removing a non-isolated node deletes the node and merges the edges that were attached to the node into a single edge. (Spatial applies complex rules, which are not documented, to determine the ID value and direction of the resulting edge.) To remove a non-isolated or isolated node, use the SDO_TOPO_MAP.REMOVE_ NODE procedure. Figure 2–9 shows the removal of a node (N1) that is attached to edges E1 and E2. Figure 2–9 Removing a Non-Isolated Node Before Removing a Node N3 N2 N1 E1 E2 After Removing a Node N3 N2 E1 As a result of the operation shown in Figure 2–9: ■ ■ Edge E1 is redefined to consist of the line segments that had represented the original edges E1 and E2. Edge E2 is deleted. Editing Topologies 2-13 Performing Operations on Nodes ■ If any linear features were defined on both original edges, they are automatically redefined to be on the resulting edge, and a record is added to the history information table (explained in Section 1.5.5) for the topology. For example, if a street named Main Street had been defined on the original edges E1 and E2 in Figure 2–9, then after the removal of node N1, Main Street would be defined on edge E1. A node cannot be removed if one or more of the following are true: ■ ■ A point feature is defined on the node. For example, if a point feature named Metropolitan Art Museum had been defined on node N1 in Figure 2–9, node N1 cannot be removed. Before you can remove the node in this case, you must remove the definition of any point features on the node. A linear feature defined on either original edge is not also defined on both edges. For example, if a linear feature named Main Street had been defined on edge E1 but not edge E2 in Figure 2–9, node N1 cannot be removed. 2.2.4 Removing Obsolete Nodes An obsolete node is a node that is connected to only two distinct edges, is not assigned to any point feature, and does not serve as the demarcation between different linear features. Obsolete nodes can result when the SDO_TOPO_MAP.ADD_ POLYGON_GEOMETRY function is used repeatedly to build a topology, or when edges have been removed during editing operations, leaving some unnecessary nodes. Therefore, it is recommended that you use the SDO_TOPO_MAP.REMOVE_ OBSOLETE_NODES procedure to remove obsolete nodes in such cases. Spatial automatically updates the appropriate entries in the _ NODE$ and _EDGE$ tables, and in the _FACE$ table if necessary. Figure 2–10 shows the removal of obsolete nodes in a simple topology. In this topology, node N1 has a point feature named Art Museum defined on it, and node N3 has a point feature named Town Hall defined on it. Edges E1, E2, and E3 have a linear feature named Main Street defined on them, and edge E4 has a linear feature named First Avenue defined on it. 2-14 Oracle Spatial Topology and Network Data Models Performing Operations on Edges Figure 2–10 Removing Obsolete Nodes N1 = Art Museum (point feature) E1, E2, E3 = Main Street (linear feature) N3 = Town Hall (point feature) E4 = First Avenue (linear feature) Before Removing Obsolete Nodes N1 N2 N3 E1 N4 E3 E2 E4 N6 N5 After Removing Obsolete Nodes (Only N2 Here) N3 N1 N4 E3 E1 E4 N6 N5 In Figure 2–10, the only node removed is N2, because only that node satisfies all the criteria for an obsolete node. As for the other nodes: ■ ■ ■ N1 is connected to only one edge (E1), and it has a point feature defined on it (Art Museum). N3 has a point feature defined on it (Town Hall). N4 is the demarcation between two different linear features (Main Street and First Avenue). ■ N5 is connected to only one edge (E4). ■ Node N6 is an isolated node (not connected to any edges). Also as a result of the operation shown in Figure 2–10, edge E2 was removed as a result of the removal of node N2. 2.3 Performing Operations on Edges This section describes the effects of adding, moving, removing, and updating edges, and explains how to perform these operations using the PL/SQL API. 2.3.1 Adding an Edge Adding a non-isolated edge adds the edge to a face. It also splits the face, causing the original face to be divided into two faces. Spatial automatically adjusts the definition of the original face and creates a new face (assigning it an ID value that is unique among faces in the topology). To add an edge, use the SDO_TOPO_MAP.ADD_EDGE procedure. You must specify existing nodes as the start and end nodes of the added edge. Figure 2–11 shows the addition of an edge (E7) between nodes N3 and N5 on face F3. Editing Topologies 2-15 Performing Operations on Edges Figure 2–11 Adding a Non-Isolated Edge Before Adding an Edge N6 E5 N5 E6 E4 N4 F3 N1 E1 E3 N3 E2 N2 E4 N4 After Adding an Edge N6 E6 E5 N5 F1 N1 E1 E7 N3 F3 E3 E2 N2 As a result of the operation shown in Figure 2–11, face F3 is redefined to be two faces, F1 and F3. (Spatial applies complex rules, which are not documented, to determine the ID values of the resulting faces.) Any polygon features that were defined on the original face are automatically redefined to be on both resulting faces. For example, if a park named Walden State Park had been defined on the original face F3 in Figure 2–11, then after the addition of edge E7, Walden State Park would be defined on both faces F1 and F3. 2.3.2 Moving an Edge Moving a non-isolated edge keeps the start or end point of the edge in the same position and moves the other of those two points to another existing node position. You must specify the source node (location before the move of the node to be moved), the target node (location after the move of the node being moved), and the vertices for the moved edge. To move an edge, use the SDO_TOPO_MAP.MOVE_EDGE procedure. Figure 2–12 shows the movement of edge E7, which was originally between nodes N3 and N5, to be between nodes N2 and N5. 2-16 Oracle Spatial Topology and Network Data Models Performing Operations on Edges Figure 2–12 Moving a Non-Isolated Edge Before Moving an Edge N6 E6 E5 F1 N1 E1 N5 E7 E4 N4 E3 F3 N3 E2 N2 E4 N4 After Moving an Edge N6 E6 E5 N5 F1 N1 E1 F3 E7 N3 E2 E3 N2 As a result of the operation shown in Figure 2–12, faces F1 and F3 are automatically redefined to reflect the coordinates of their edges, including the new coordinates for edge E7. Any isolated nodes and edges might remain in the same face or be moved to a different face as a result of a move operation on a non-isolated edge. The SDO_TOPO_ MAP.MOVE_EDGE procedure has two output parameters, moved_iso_nodes and moved_iso_edges, that store the ID numbers of any isolated nodes and edges that were moved to a different face as a result of the operation. An edge cannot be moved if, as a result of the move, any of the following would happen: ■ ■ The moved edge would intersect any other edge. For example, assume that the topology before the move, as shown in Figure 2–12, had included another edge (E10) that was between nodes N3 and N4. In this case, the movement of edge E7 would cause it to intersect edge E10, and therefore the move operation is not performed. The node would be moved to a face that does not currently bound the edge. For example, if the movement of edge E7 would place its terminating point at a node outside the faces shown in Figure 2–12 (F1 and F3), the move operation is not performed. 2.3.3 Removing an Edge Removing a non-isolated edge deletes the edge and merges the faces that bounded the edge. (Spatial applies complex rules, which are not documented, to determine the ID value of the resulting face.) To remove an edge, use the SDO_TOPO_MAP.REMOVE_EDGE procedure. Figure 2–13 shows the removal of an edge (E7) that is bounded by faces F1 and F3. Editing Topologies 2-17 Performing Operations on Edges Figure 2–13 Removing a Non-Isolated Edge Before Removing an Edge N6 E6 E5 N5 F1 N1 E4 E7 E1 N3 N4 F3 E3 E2 N2 E4 N4 After Removing an Edge N6 E5 E6 N5 F1 N1 E1 N3 E3 E2 N2 As a result of the operation shown in Figure 2–13: ■ Face F1 is redefined to consist of the area of the original faces F1 and F3. ■ Face F3 is deleted. ■ The start and end nodes of the deleted edge (nodes N3 and N5) are not removed. Any polygon features that were defined on both original faces are automatically redefined to be on the resulting face. For example, if a park named Adams Park had been defined on the original faces F1 and F3 in Figure 2–13, then after the removal of edge E7, Adams Park would be defined on face F1. A non-isolated edge cannot be removed if one or more of the following are true: ■ ■ A linear feature is defined on the edge. For example, if a linear feature named Main Street had been defined on edge E7 in Figure 2–13, edge E7 cannot be removed. Before you can remove the edge in this case, you must remove the definition of any linear features on the edge. A polygon feature defined on either original face is not also defined on both faces. For example, if a linear feature named Adams Park had been defined on face F1 but not face F3 in Figure 2–13, edge E7 cannot be removed. 2.3.4 Updating an Edge Updating an isolated edge means changing one or more coordinates of the edge, but without changing the start point and end point. To update an edge, use the SDO_TOPO_MAP.CHANGE_EDGE_COORDS procedure. Any isolated nodes and edges might remain in the same face or be moved to a different face as a result of an update operation on a non-isolated edge. The SDO_ TOPO_MAP.CHANGE_EDGE_COORDS procedure has two output parameters, moved_iso_nodes and moved_iso_edges, that store the ID numbers of any isolated nodes and edges that were moved to a different face as a result of the operation. An edge cannot be updated if, as a result of the operation, it would intersect any other edge. See the Usage Notes for the SDO_TOPO_MAP.CHANGE_EDGE_COORDS procedure for more information about updating an edge. 2-18 Oracle Spatial Topology and Network Data Models 3 SDO_TOPO Package Subprograms The MDSYS.SDO_TOPO package contains subprograms (functions and procedures) that constitute part of the PL/SQL application programming interface (API) for the Spatial topology data model. This package mainly contains subprograms for creating and managing topologies. To use the subprograms in this chapter, you must understand the conceptual information about topology in Chapter 1. Another package, SDO_TOPO_MAP, mainly contains subprograms related to editing topologies. Reference information for the SDO_TOPO_MAP package is in Chapter 4. The rest of this chapter provides reference information about the SDO_TOPO subprograms, listed in alphabetical order. SDO_TOPO Package Subprograms 3-1 SDO_TOPO.ADD_TOPO_GEOMETRY_LAYER SDO_TOPO.ADD_TOPO_GEOMETRY_LAYER Format SDO_TOPO.ADD_TOPO_GEOMETRY_LAYER( topology IN VARCHAR2, table_name IN VARCHAR2, column_name IN VARCHAR2, topo_geometry_layer_type IN VARCHAR2, relation_table_storage IN VARCHAR2 DEFAULT NULL, child_layer_id IN NUMBER DEFAULT NULL); Description Adds a topology geometry layer to a topology. Parameters topology Topology to which to add the topology geometry layer containing the topology geometries in the specified column. The topology must have been created using the SDO_TOPO.CREATE_TOPOLOGY procedure. table_name Name of the topology geometry layer table containing the column specified in column_name. column_name Name of the column (of type SDO_TOPO_GEOMETRY) containing the topology geometries in the topology geometry layer to be added to the topology. topo_geometry_layer_type Type of topology geometry layer: POINT, LINE, CURVE, POLYGON, or COLLECTION. relation_table_storage Physical storage parameters used internally to create the _ RELATION$ table (described in Section 1.5.4). Must be a valid string for use with the CREATE TABLE statement. For example: TABLESPACE tbs_3 STORAGE (INITIAL 100K NEXT 200K). If you do not specify this parameter, the default physical storage values are used. child_layer_id Layer ID number of the child topology geometry layer for this layer, if the topology has a topology geometry layer hierarchy. (Topology geometry layer hierarchy is explained in Section 1.4.) If you do not specify this parameter and if the topology has a topology geometry layer hierarchy, the topology geometry layer is added to the lowest level (level 0) of the hierarchy. If the topology does not have a topology geometry layer hierarchy, do not specify this parameter when adding any of the topology geometry layers. 3-2 Oracle Spatial Topology and Network Data Models SDO_TOPO.ADD_TOPO_GEOMETRY_LAYER Usage Notes The first call to this procedure for a given topology creates the _ RELATION$ table, which is described in Section 1.5.4. This procedure automatically performs a commit operation, and therefore it cannot be rolled back. To delete the topology that you just created, call the SDO_TOPO.DELETE_ TOPO_GEOMETRY_LAYER procedure. The procedure creates a spatial index on the spatial features in the topology geometries, and a B-tree index on the combination of tg_type and tg_id in the topology geometries. The topology owner must have the CREATE VIEW privilege. The topology geometry layer table (table_name parameter) cannot be an object table. An exception is raised if topology, table_name, or column_name does not exist, or if topo_geometry_layer_type is not one of the supported values. Examples The following example adds a topology geometry layer to the CITY_DATA topology. The topology geometry layer consists of polygon geometries in the FEATURE column of the LAND_PARCELS table. (The example refers to definitions and data from Section 1.12.1.) EXECUTE SDO_TOPO.ADD_TOPO_GEOMETRY_LAYER('CITY_DATA', 'LAND_PARCELS', 'FEATURE', 'POLYGON'); SDO_TOPO Package Subprograms 3-3 SDO_TOPO.CREATE_TOPOLOGY SDO_TOPO.CREATE_TOPOLOGY Format SDO_TOPO.CREATE_TOPOLOGY( topology IN VARCHAR2, tolerance IN NUMBER, srid IN NUMBER DEFAULT NULL, node_table_storage IN VARCHAR2 DEFAULT NULL, edge_table_storage IN VARCHAR2 DEFAULT NULL, face_table_storage IN VARCHAR2 DEFAULT NULL, history_table_storage IN VARCHAR2 DEFAULT NULL. digits_right_of_decimal IN VARCHAR2 DEFAULT 16); Description Creates a topology. Parameters topology Name of the topology to be created. Must not exceed 20 characters. tolerance Tolerance value associated with topology geometries in the topology. (Tolerance is explained in Chapter 1 of Oracle Spatial User's Guide and Reference.) Oracle Spatial uses the tolerance value in building R-tree indexes on the node, edge, and face tables; the value is also used for any spatial queries that use these tables. srid Coordinate system (spatial reference system) associated with all topology geometry layers in the topology. The default is null: no coordinate system is associated; otherwise, it must be a value from the SRID column of the SDO_COORD_REF_SYS table (described in Oracle Spatial User's Guide and Reference). node_table_storage Physical storage parameters used internally to create the _NODE$ table (described in Section 1.5.2). Must be a valid string for use with the CREATE TABLE statement. For example: TABLESPACE tbs_3 STORAGE (INITIAL 100K NEXT 200K). If you do not specify this parameter, the default physical storage values are used. edge_table_storage Physical storage parameters used internally to create the _EDGE$ table (described in Section 1.5.1). Must be a valid string for use with the CREATE TABLE statement. For example: TABLESPACE tbs_3 STORAGE (INITIAL 100K NEXT 200K). If you do not specify this parameter, the default physical storage values are used. 3-4 Oracle Spatial Topology and Network Data Models SDO_TOPO.CREATE_TOPOLOGY face_table_storage Physical storage parameters used internally to create the _FACE$ table (described in Section 1.5.3). Must be a valid string for use with the CREATE TABLE statement. For example: TABLESPACE tbs_3 STORAGE (INITIAL 100K NEXT 200K). If you do not specify this parameter, the default physical storage values are used. history_table_storage Physical storage parameters used internally to create the _ HISTORY$ table (described in Section 1.5.5. Must be a valid string for use with the CREATE TABLE statement. For example: TABLESPACE tbs_3 STORAGE (INITIAL 100K NEXT 200K). If you do not specify this parameter, the default physical storage values are used. digits_right_of_decimal The number of digits permitted to the right of the decimal point in the expression of any coordinate position when features are added to an existing topology. All incoming features (those passed as arguments to the addLinearGeometry, addPolygonGeometry, or addPointGeometry method in the Java API or the equivalent PL/SQL subprograms) will be automatically snapped (truncated) to the number of digits right of the decimal that is specified in this parameter. The default is 16. This value should be set to match the last digit right of the decimal point that is considered valid based on the accuracy of the incoming data. This mechanism is provided to improve the stability of the computational geometry during the feature insertion process, and to minimize the creation of sliver polygons and other undesired results. Usage Notes This procedure creates the _EDGE$, _NODE$, _FACE$, and _HISTORY$ tables, which are described in Section 1.5, and it creates B-tree indexes on the primary keys of these tables. This procedure also creates the metadata for the topology. In the srid parameter, you can specify a geodetic coordinate system; however, all Spatial internal operations on the topology will use Cartesian (not geodetic) arithmetic operations. (Geodetic and non-geodetic coordinate systems are discussed in Oracle Spatial User's Guide and Reference.) Node, edge, face, and history tables are created without partitions; however, you can alter any of these tables to make it partitioned. You can also create a partitioned spatial index on a partitioned table, as explained in Oracle Spatial User's Guide and Reference. This procedure automatically performs a commit operation, and therefore it cannot be rolled back. To delete the topology that you just created, call the SDO_TOPO.DROP_ TOPOLOGY procedure. An exception is raised if the topology already exists. Examples The following example creates a topology named CITY_DATA. The spatial geometries in this topology have a tolerance value of 0.5 and use the WGS 84 coordinate system (longitude and latitude, SRID value 8307). (The example refers to definitions and data from Section 1.12.1.) EXECUTE SDO_TOPO.CREATE_TOPOLOGY('CITY_DATA', 0.5, 8307); SDO_TOPO Package Subprograms 3-5 SDO_TOPO.DELETE_TOPO_GEOMETRY_LAYER SDO_TOPO.DELETE_TOPO_GEOMETRY_LAYER Format SDO_TOPO.DELETE_TOPO_GEOMETRY_LAYER( topology IN VARCHAR2, table_name IN VARCHAR2, column_name IN VARCHAR2); Description Deletes a topology geometry layer from a topology. Parameters topology Topology from which to delete the topology geometry layer containing the topology geometries in the specified column. The topology must have been created using the SDO_TOPO.CREATE_TOPOLOGY procedure. table_name Name of the table containing the column specified in column_name. column_name Name of the column containing the topology geometries in the topology geometry layer to be deleted from the topology. Usage Notes This procedure deletes data associated with the specified topology geometry layer from the _RELATION$ table (described in Section 1.5.4). If this procedure is deleting the only remaining topology geometry layer from the topology, it also deletes the _RELATION$ table. This procedure automatically performs a commit operation, and therefore it cannot be rolled back. Examples The following example deletes the topology geometry layer that is based on the geometries in the FEATURE column of the LAND_PARCELS table from the topology named CITY_DATA. (The example refers to definitions and data from Section 1.12.1.) EXECUTE SDO_TOPO.DELETE_TOPO_GEOMETRY_LAYER('CITY_DATA', 'LAND_PARCELS', 'FEATURE'); 3-6 Oracle Spatial Topology and Network Data Models SDO_TOPO.DROP_TOPOLOGY SDO_TOPO.DROP_TOPOLOGY Format SDO_TOPO.DROP_TOPOLOGY( topology IN VARCHAR2); Description Deletes a topology. Parameters topology Name of the topology to be deleted. The topology must have been created using the SDO_TOPO.CREATE_TOPOLOGY procedure. Usage Notes This procedure deletes the _EDGE$, _NODE$, _FACE$, _NODE$, _ RELATION$, and _HISTORY$ tables (described in Section 1.5). If there are no topology layers associated with the topology, the topology is removed from the Spatial metadata. This procedure automatically performs a commit operation, and therefore it cannot be rolled back. An exception is raised if the topology contains any topology geometries from any topology geometry layers. If you encounter this exception, delete all topology geometry layers in the topology using the SDO_TOPO.DELETE_TOPO_GEOMETRY_ LAYER procedure for each topology geometry layer, and then drop the topology. Examples The following example drops the topology named CITY_DATA. (The example refers to definitions and data from Section 1.12.1.) EXECUTE SDO_TOPO.DROP_TOPOLOGY('CITY_DATA'); SDO_TOPO Package Subprograms 3-7 SDO_TOPO.GET_FACE_BOUNDARY SDO_TOPO.GET_FACE_BOUNDARY Format SDO_TOPO.GET_FACE_BOUNDARY( topology IN VARCHAR2, face_id IN NUMBER, all_edges IN VARCHAR2 DEFAULT 'FALSE' ) RETURN SDO_LIST_TYPE; Description Returns a list of the signed ID numbers of the edges for the specified face. Parameters topology Name of the topology that contains the face. Must not exceed 20 characters. face_id Face ID value of the face. all_edges TRUE includes all edges that bound the face (that is, that have the face on one or both sides); FALSE (the default) includes only edges that constitute the external boundary of the face. (See the examples for this function.) Usage Notes None. Examples The following examples return the ID numbers of the edges for the face whose face ID value is 1. The first example accepts the default value of 'FALSE' for the all_edges parameter. The second example specifies 'TRUE' for all_edges, and the list includes the ID numbers of the boundary edge and the two isolated edges on the face. (The examples refer to definitions and data from Section 1.12.) -- Get the boundary of face with face_id 1. SELECT SDO_TOPO.GET_FACE_BOUNDARY('CITY_DATA', 1) FROM DUAL; SDO_TOPO.GET_FACE_BOUNDARY('CITY_DATA',1) -------------------------------------------------------------------------------SDO_LIST_TYPE(1) -- Specify 'TRUE' for the all_edges parameter. SELECT SDO_TOPO.GET_FACE_BOUNDARY('CITY_DATA', 1, 'TRUE') FROM DUAL; SDO_TOPO.GET_FACE_BOUNDARY('CITY_DATA',1,'TRUE') -------------------------------------------------------------------------------SDO_LIST_TYPE(1, -26, 25) 3-8 Oracle Spatial Topology and Network Data Models SDO_TOPO.GET_TOPO_OBJECTS SDO_TOPO.GET_TOPO_OBJECTS Format SDO_TOPO.GET_TOPO_OBJECTS( topology IN VARCHAR2, geometry IN SDO_GEOMETRY ) RETURN SDO_TOPO_OBJECT_ARRAY; or SDO_TOPO.GET_TOPO_OBJECTS( topology IN VARCHAR2, topo_geometry_layer_id IN NUMBER, topo_geometry_id IN NUMBER ) RETURN SDO_TOPO_OBJECT_ARRAY; Description Returns an array of SDO_TOPO_OBJECT objects that interact with a specified geometry object or topology geometry object. Parameters topology Name of the topology. Must not exceed 20 characters. geometry Geometry object to be checked. topo_geometry_layer_id ID number of the topology geometry layer that contains the topology geometry object to be checked. topo_geometry_id ID number of the topology geometry object to be checked. Usage Notes The SDO_TOPO_OBJECT_ARRAY data type is described in Section 1.6.2.1. For a topology that has a topology geometry layer hierarchy, this function works for all levels of the hierarchy, and it always returns the leaf-level (lowest-level) objects. (Topology geometry layer hierarchy is explained in Section 1.4.) Examples The following example returns the topology geometry objects that interact with land parcel P2 in the CITY_DATA topology. (The example refers to definitions and data from Section 1.12.1.) -- CITY_DATA layer, land parcels (topo_geometry_ layer_id = 1), -- parcel P2 (topo_geometry_id = 2) SELECT SDO_TOPO.GET_TOPO_OBJECTS('CITY_DATA', 1, 2) FROM DUAL; SDO_TOPO Package Subprograms 3-9 SDO_TOPO.GET_TOPO_OBJECTS SDO_TOPO.GET_TOPO_OBJECTS('CITY_DATA',1,2)(TOPO_ID, TOPO_TYPE) -------------------------------------------------------------------------------SDO_TOPO_OBJECT_ARRAY(SDO_TOPO_OBJECT(9, 1), SDO_TOPO_OBJECT(10, 1), SDO_TOPO_OB JECT(13, 1), SDO_TOPO_OBJECT(14, 1), SDO_TOPO_OBJECT(17, 1), SDO_TOPO_OBJECT(18, 1), SDO_TOPO_OBJECT(6, 2), SDO_TOPO_OBJECT(7, 2), SDO_TOPO_OBJECT(8, 2), SDO_TO PO_OBJECT(9, 2), SDO_TOPO_OBJECT(10, 2), SDO_TOPO_OBJECT(11, 2), SDO_TOPO_OBJECT (12, 2), SDO_TOPO_OBJECT(13, 2), SDO_TOPO_OBJECT(14, 2), SDO_TOPO_OBJECT(17, 2), SDO_TOPO_OBJECT(18, 2), SDO_TOPO_OBJECT(19, 2), SDO_TOPO_OBJECT(20, 2), SDO_TOP O_OBJECT(-6, 2), SDO_TOPO_OBJECT(-7, 2), SDO_TOPO_OBJECT(-8, 2), SDO_TOPO_OBJECT (-9, 2), SDO_TOPO_OBJECT(-10, 2), SDO_TOPO_OBJECT(-11, 2), SDO_TOPO_OBJECT(-12, 2), SDO_TOPO_OBJECT(-13, 2), SDO_TOPO_OBJECT(-14, 2), SDO_TOPO_OBJECT(-17, 2), S DO_TOPO_OBJECT(-18, 2), SDO_TOPO_OBJECT(-19, 2), SDO_TOPO_OBJECT(-20, 2), SDO_TO PO_OBJECT(-1, 3), SDO_TOPO_OBJECT(3, 3), SDO_TOPO_OBJECT(4, 3), SDO_TOPO_OBJECT( 5, 3), SDO_TOPO_OBJECT(6, 3), SDO_TOPO_OBJECT(7, 3), SDO_TOPO_OBJECT(8, 3)) 3-10 Oracle Spatial Topology and Network Data Models SDO_TOPO.INITIALIZE_AFTER_IMPORT SDO_TOPO.INITIALIZE_AFTER_IMPORT Format SDO_TOPO.INITIALIZE_AFTER_IMPORT( topology IN VARCHAR2); Description Creates (initializes) a topology that was imported from another database. Parameters topology Name of the topology to be created. The topology must have been exported from a source database. Usage Notes This procedure creates the specified topology and all related database structures, adjusts (if necessary) the topology ID values in all feature tables, and creates the feature layers in the correct order. Before calling this procedure, connect to the database as the user for the schema that is to own the topology to be created. You must use this procedure after following all other required steps for exporting and importing the topology, as explained in Section 1.9. Examples The following example creates the topology named CITY_DATA , using information from the imported tables, including CITY_DATA_EXP$. (The example refers to definitions and data from Section 1.12.1.) EXECUTE SDO_TOPO.INITIALIZE_AFTER_IMPORT('CITY_DATA'); SDO_TOPO Package Subprograms 3-11 SDO_TOPO.INITIALIZE_METADATA SDO_TOPO.INITIALIZE_METADATA Format SDO_TOPO.INITIALIZE_METADATA( topology IN VARCHAR2); Description Initializes the topology metadata: sets sequence information for the node, edge, and face tables, and creates (or re-creates) required indexes on these tables. Parameters topology Name of the topology for which to initialize the sequences. The topology must have been created using the SDO_TOPO.CREATE_TOPOLOGY procedure. Usage Notes You should run this procedure after loading data into the node, edge, or face tables, to initialize the sequences for these tables with numeric values 2 higher than the highest ID values stored in those tables. This ensures that no attempt is made to reuse the unique ID values in these tables. (The node, edge, and face tables are described in Section 1.5.) This procedure creates spatial indexes on the geometry or MBR geometry columns in the node, edge, and face tables. If the indexes were dropped before a bulk load operation, running this procedure after the bulk load will re-create these indexes. Examples The following example initializes the metadata for the topology named CITY_DATA. (The example refers to definitions and data from Section 1.12.1.) EXECUTE SDO_TOPO.INITIALIZE_METADATA('CITY_DATA'); 3-12 Oracle Spatial Topology and Network Data Models SDO_TOPO.PREPARE_FOR_EXPORT SDO_TOPO.PREPARE_FOR_EXPORT Format SDO_TOPO.PREPARE_FOR_EXPORT( topology IN VARCHAR2); Description Prepares a topology to be exported to another database. Parameters topology Name of the topology to be prepared for export. The topology must have been created using the SDO_TOPO.CREATE_TOPOLOGY procedure. Usage Notes This procedure prepares the specified topology in the current database (the source database) to be exported to another database (the target database). This procedure creates a table in the current schema with a table name in the format _EXP$. This table contains the same columns as the USER_SDO_ TOPO_INFO and ALL_SDO_TOPO_INFO views. These columns are described in Table 1–8 in Section 1.7.1. Before calling this procedure, connect to the database as the owner of the topology. For information about exporting and importing topologies, including the steps to be followed, see Section 1.9. Examples The following example prepares the topology named CITY_DATA for export to a target database. (The example refers to definitions and data from Section 1.12.1.) EXECUTE SDO_TOPO.PREPARE_FOR_EXPORT('CITY_DATA'); SDO_TOPO Package Subprograms 3-13 SDO_TOPO.RELATE SDO_TOPO.RELATE Format SDO_TOPO.RELATE( geom1 IN SDO_TOPO_GEOMETRY, geom2 IN SDO_TOPO_GEOMETRY, mask IN VARCHAR2 ) RETURN VARCHAR2; or SDO_TOPO.RELATE( feature1 IN SDO_TOPO_GEOMETRY, feature2 IN SDO_GEOMETRY, mask IN VARCHAR2 ) RETURN VARCHAR2; or SDO_TOPO.RELATE( geom IN SDO_TOPO_GEOMETRY, topo_elem_array IN SDO_TOPO_OBJECT_ARRAY, mask IN VARCHAR2 ) RETURN VARCHAR2; Description Examines two topology geometry objects, or a topology geometry and a spatial geometry, or a topology geometry and a topology object array (SDO_TOPO_OBJECT_ ARRAY object), to determine their spatial relationship. Parameters geom1 Topology geometry object. geom2 Topology geometry object. feature1 Topology geometry object. feature2 Spatial geometry object. geom Topology geometry object. 3-14 Oracle Spatial Topology and Network Data Models SDO_TOPO.RELATE topo_elem_array Topology object array (of type SDO_TOPO_OBJECT_ARRAY, which is described in Section 1.6.2.1). mask Specifies one or more relationships to check. See the list of keywords in the Usage Notes. Usage Notes The topology operators (described in Section 1.8.1) provide better performance than the SDO_TOPO.RELATE function if you are checking a large number of objects; however, if you are checking just two objects or a small number, the SDO_ TOPO.RELATE function provides better performance. In addition, sometimes you may need to use the SDO_TOPO.RELATE function instead of a topology operator. For example, you cannot specify the DETERMINE mask keyword with the topology operators. The following keywords can be specified in the mask parameter to determine the spatial relationship between two objects: ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ANYINTERACT: Returns TRUE if the objects are not disjoint. CONTAINS: Returns TRUE if the second object is entirely within the first object and the object boundaries do not touch; otherwise, returns FALSE. COVEREDBY: Returns TRUE if the first object is entirely within the second object and the object boundaries touch at one or more points; otherwise, returns FALSE. COVERS: Returns TRUE if the second object is entirely within the first object and the boundaries touch in one or more places; otherwise, returns FALSE. DETERMINE: Returns the one relationship keyword that best matches the geometries. DISJOINT: Returns TRUE if the objects have no common boundary or interior points; otherwise, returns FALSE. EQUAL: Returns TRUE if the objects share every point of their boundaries and interior, including any holes in the objects; otherwise, returns FALSE. INSIDE: Returns TRUE if the first object is entirely within the second object and the object boundaries do not touch; otherwise, returns FALSE. ON: Returns TRUE if the boundary and interior of a line (the first object) is completely on the boundary of a polygon (the second object); otherwise, returns FALSE. OVERLAPBDYDISJOINT: Returns TRUE if the objects overlap, but their boundaries do not interact; otherwise, returns FALSE. OVERLAPBDYINTERSECT: Returns TRUE if the objects overlap, and their boundaries intersect in one or more places; otherwise, returns FALSE. TOUCH: Returns TRUE if the two objects share a common boundary point, but no interior points; otherwise, returns FALSE. Values for mask (except for DETERMINE) can be combined using the logical Boolean operator OR. For example, 'INSIDE + TOUCH' returns the string TRUE or FALSE depending on the outcome of the test. SDO_TOPO Package Subprograms 3-15 SDO_TOPO.RELATE Examples The following example finds whether or not the ANYINTERACT relationship exists between each topology geometry object in the CITY_STREETS table and the P3 land parcel (that is, which streets interact with that land parcel). (The example refers to definitions and data from Section 1.12. The output is reformatted for readability.) SELECT c.feature_name, SDO_TOPO.RELATE(c.feature, l.feature, 'anyinteract') Any_Interaction FROM city_streets c, land_parcels l WHERE l.feature_name = 'P3'; FEATURE_NAME ANY_INTERACTION ------------ --------------R1 TRUE R2 FALSE R3 FALSE R4 FALSE The following example finds whether or not the ANYINTERACT relationship exists between each topology geometry object in the CITY_STREETS table and an SDO_ TOPO_OBJECT_ARRAY object that happens to be identical to the land parcel feature named P3. (This example uses definitions and data from Section 1.12.) The output is identical to that in the preceding example, and is reformatted for readability. SELECT c.feature_name, SDO_TOPO.RELATE(c.feature, SDO_TOPO_OBJECT_ARRAY (SDO_TOPO_OBJECT (5, 3), SDO_TOPO_OBJECT (8, 3)), 'anyinteract') Any_Interaction FROM city_streets c, land_parcels l WHERE l.feature_name = 'P3'; FEATURE_NAME ANY_INTERACTION ------------ --------------R1 TRUE R2 FALSE R3 FALSE R4 FALSE 3-16 Oracle Spatial Topology and Network Data Models 4 SDO_TOPO_MAP Package Subprograms The MDSYS.SDO_TOPO_MAP package contains subprograms (functions and procedures) that constitute part of the PL/SQL application programming interface (API) for the Spatial topology data model. This package contains subprograms related to editing topologies. These subprograms use a TopoMap object, either one that you previously created or that Spatial creates implicitly. To use the subprograms in this chapter, you must understand the conceptual information about topology in Chapter 1, as well as the information about editing topologies in Chapter 2. The rest of this chapter provides reference information about the SDO_TOPO_MAP subprograms, listed in alphabetical order. SDO_TOPO_MAP Package Subprograms 4-1 SDO_TOPO_MAP.ADD_EDGE SDO_TOPO_MAP.ADD_EDGE Format SDO_TOPO_MAP.ADD_EDGE( topology IN VARCHAR2, node_id1 IN NUMBER, node_id2 IN NUMBER, geom IN SDO_GEOMETRY ) RETURN NUMBER; Description Adds an edge to a topology, and returns the edge ID of the added edge. Parameters topology Name of the topology to which to add the edge, or null if you are using an updatable TopoMap object (see Section 2.1.2). Must not exceed 20 characters. node_id1 Node ID of the start node for the edge to be added. node_id2 Node ID of the end node for the edge to be added. geom SDO_GEOMETRY object (line or contiguous line string geometry) representing the edge to be added. Usage Notes Spatial automatically assigns an edge ID to the added edge. If topology is not null, the appropriate entry is inserted in the _EDGE$ table; and if the addition of the edge affects the face information table, the appropriate entries in the _FACE$ table are updated. (If topology is null, you can update these tables at any time by calling the SDO_TOPO_MAP.UPDATE_TOPO_MAP procedure.) If node_id1 and node_id2 are the same value, a loop edge is created. For information about adding and deleting nodes and edges, see Chapter 2. This function is equivalent to using the addEdge method of the TopoMap class of the client-side Java API (described in Section 1.8.2). Examples The following example adds an edge connecting node N3 to node N4 in the current updatable TopoMap object. (The example refers to definitions and data from Section 1.12.1.) CALL SDO_TOPO_MAP.ADD_EDGE(null, 3, 4, SDO_GEOMETRY(2002, NULL, NULL, SDO_ELEM_INFO_ARRAY(1, 2, 1), 4-2 Oracle Spatial Topology and Network Data Models SDO_TOPO_MAP.ADD_EDGE SDO_ORDINATE_ARRAY(25,35, 20,37))) INTO :res_number; Call completed. SQL> PRINT res_number; RES_NUMBER ---------29 SDO_TOPO_MAP Package Subprograms 4-3 SDO_TOPO_MAP.ADD_ISOLATED_NODE SDO_TOPO_MAP.ADD_ISOLATED_NODE Format SDO_TOPO_MAP.ADD_ISOLATED_NODE( topology IN VARCHAR2, face_id IN NUMBER, point IN SDO_GEOMETRY ) RETURN NUMBER; or SDO_TOPO_MAP.ADD_ISOLATED_NODE( topology IN VARCHAR2, point IN SDO_GEOMETRY ) RETURN NUMBER; or SDO_TOPO_MAP.ADD_ISOLATED_NODE( topology IN VARCHAR2, face_id IN NUMBER, x IN NUMBER, y IN NUMBER ) RETURN NUMBER; or SDO_TOPO_MAP.ADD_ISOLATED_NODE( topology IN VARCHAR2, x IN NUMBER, y IN NUMBER ) RETURN NUMBER; Description Adds an isolated node (that is, an island node) to a topology, and returns the node ID of the added isolated node. Parameters topology Name of the topology to which to add the isolated node, or null if you are using an updatable TopoMap object (see Section 2.1.2). Must not exceed 20 characters. face_id Face ID of the face on which the isolated node is to be added. (An exception is raised if the specified point is not on the specified face.) 4-4 Oracle Spatial Topology and Network Data Models SDO_TOPO_MAP.ADD_ISOLATED_NODE point SDO_GEOMETRY object (point geometry) representing the isolated node to be added. x X-axis value of the point representing the isolated node to be added. y Y-axis value of the point representing the isolated node to be added. Usage Notes Spatial automatically assigns a node ID to the added node. If topology is not null, the appropriate entry is inserted in the _NODE$ table, and the _FACE$ table is updated to include an entry for the added isolated node. (If topology is null, you can update these tables at any time by calling the SDO_TOPO_MAP.UPDATE_TOPO_MAP procedure.) If you know the ID of the face on which the isolated node is to be added, you can specify the face_id parameter. If you specify this parameter, there are two benefits: ■ ■ Validation: The function checks to see if the point is on the specified face, and raises an exception if it is not. Otherwise, the function checks to see if the point is on any face in the topology, and raises an exception if it is not. Performance: The function checks only if the point is on the specified face. Otherwise, it checks potentially all faces in the topology to see if the point is on any face. To add a non-isolated node, use the SDO_TOPO_MAP.ADD_NODE function. For information about adding and deleting nodes and edges, see Chapter 2. This function is equivalent to using the addIsolatedNode method of the TopoMap class of the client-side Java API (described in Section 1.8.2). Examples The following example adds an isolated node to the right of isolated node N4 on face F2, and it returns the node ID of the added node. It uses the current updatable TopoMap object. (The example refers to definitions and data from Section 1.12.1.) DECLARE result_num NUMBER; BEGIN result_num := SDO_TOPO_MAP.ADD_ISOLATED_NODE(null, 2, SDO_GEOMETRY(2001, NULL, SDO_POINT_TYPE(22,37,NULL), NULL, NULL)); DBMS_OUTPUT.PUT_LINE('Result = ' || result_num); END; / Result = 24 PL/SQL procedure successfully completed. SDO_TOPO_MAP Package Subprograms 4-5 SDO_TOPO_MAP.ADD_LINEAR_GEOMETRY SDO_TOPO_MAP.ADD_LINEAR_GEOMETRY Format SDO_TOPO_MAP.ADD_LINEAR_GEOMETRY( topology IN VARCHAR2, curve IN SDO_GEOMETRY ) RETURN SDO_NUMBER_ARRAY; or SDO_TOPO_MAP.ADD_LINEAR_GEOMETRY( topology IN VARCHAR2, coords IN SDO_NUMBER_ARRAY ) RETURN SDO_NUMBER_ARRAY; Description Adds a linear (line string or multiline string) geometry to the topology, inserting edges and nodes as necessary based on the full intersection of the geometry with the edges and nodes in the topology graph, and an array of the edge IDs of the inserted and shared edges in sequence from the start to the end of the geometry. Parameters topology Name of the topology to which to add the edge or edges, or null if you are using an updatable TopoMap object (see Section 2.1.2). Must not exceed 20 characters. curve SDO_GEOMETRY object (curve or line string geometry) representing the edge or edges to be added. coords SDO_NUMBER_ARRAY object specifying the coordinates of the edge or edges to be added. Usage Notes This function creates at least one new edge, and more edges if necessary. For example, if the line string geometry intersects an existing edge, two edges are created for the added line string, and the existing edge (the one being intersected) is divided into two edges. If topology is not null, Spatial automatically updates the _ EDGE$ table as needed. (If topology is null, you can update this table at any time by calling the SDO_TOPO_MAP.UPDATE_TOPO_MAP procedure.) This function returns an array of the edge IDs of the inserted and shared edges in sequence from the start to the end of the geometry. If a segment in the added geometry overlaps an existing edge in the topology, the sign of the returned edge depends on the directions of the added segment and the existing edge: if the direction of the existing edge is the same as the linear geometry, the returned edge element is positive; if the direction of the existing edge is the opposite of the linear geometry, the returned edge element is negative. 4-6 Oracle Spatial Topology and Network Data Models SDO_TOPO_MAP.ADD_LINEAR_GEOMETRY An exception is raised if the object in the curve or coords parameter contains any line segments that run together (overlap) in any manner; however, the line segments can cross at one or more points. For information about adding and deleting nodes and edges, see Chapter 2. This function is equivalent to using the addLinearGeometry method of the TopoMap class of the client-side Java API (described in Section 1.8.2). Examples The following example adds an edge representing a specified line string geometry, and it returns the edge ID of the added edge. It uses the current updatable TopoMap object. (The example refers to definitions and data from Section 1.12.1.) SELECT SDO_TOPO_MAP.ADD_LINEAR_GEOMETRY(null, SDO_GEOMETRY(2002, NULL, NULL, SDO_ELEM_INFO_ARRAY(1,2,1), SDO_ORDINATE_ARRAY(50,10, 55,10, 57,11))) FROM DUAL; SDO_TOPO_MAP.ADD_LINEAR_GEOMETRY(NULL,SDO_GEOMETRY(2002,NULL,NULL,SDO_ELEM_INFO_ -------------------------------------------------------------------------------SDO_NUMBER_ARRAY(31) SDO_TOPO_MAP Package Subprograms 4-7 SDO_TOPO_MAP.ADD_LOOP SDO_TOPO_MAP.ADD_LOOP Format SDO_TOPO_MAP.ADD_LOOP( topology IN VARCHAR2, node_id IN NUMBER, geom IN SDO_GEOMETRY ) RETURN NUMBER; Description Adds an edge that loops and connects to the same node, and returns the edge ID of the added edge. Parameters topology Name of the topology to which to add the edge, or null if you are using an updatable TopoMap object (see Section 2.1.2). Must not exceed 20 characters. node_id Node ID of the node to which to add the edge that will start and end at this node. geom SDO_GEOMETRY object (line string geometry) representing the edge to be added. The start and end points of the line string must be the same point representing node_id. Usage Notes This function creates a new edge, as well as a new face consisting of the interior of the loop. If the edge is added at an isolated node, the edge is an isolated edge. If topology is not null, Spatial automatically updates the _EDGE$ and _FACE$ tables as needed. (If topology is null, you can update these tables at any time by calling the SDO_TOPO_MAP.UPDATE_TOPO_MAP procedure.) For information about adding and deleting nodes and edges, see Chapter 2. This function is equivalent to using the addLoop method of the TopoMap class of the client-side Java API (described in Section 1.8.2). Examples The following example adds an edge loop starting and ending at node N4, and it returns the edge ID of the added edge. It uses the current updatable TopoMap object. (The example refers to definitions and data from Section 1.12.1.) CALL SDO_TOPO_MAP.ADD_LOOP(null, 4, SDO_GEOMETRY(2002, NULL, NULL, SDO_ELEM_INFO_ARRAY(1, 2, 1), SDO_ORDINATE_ARRAY(20,37, 20,39, 25,39, 20,37))) INTO :res_number; Call completed. SQL> PRINT res_number; 4-8 Oracle Spatial Topology and Network Data Models SDO_TOPO_MAP.ADD_LOOP RES_NUMBER ---------30 SDO_TOPO_MAP Package Subprograms 4-9 SDO_TOPO_MAP.ADD_NODE SDO_TOPO_MAP.ADD_NODE Format SDO_TOPO_MAP.ADD_NODE( topology IN VARCHAR2, edge_id IN NUMBER, point IN SDO_GEOMETRY, coord_index IN NUMBER, is_new_shape_point IN VARCHAR2 ) RETURN NUMBER; or SDO_TOPO_MAP.ADD_NODE( topology IN VARCHAR2, edge_id IN NUMBER, x IN NUMBER, y IN NUMBER, coord_index IN NUMBER, is_new_shape_point IN VARCHAR2 ) RETURN NUMBER; Description Adds a non-isolated node to a topology to split an existing edge, and returns the node ID of the added node. Parameters topology Name of the topology to which to add the node, or null if you are using an updatable TopoMap object (see Section 2.1.2). Must not exceed 20 characters. edge_id Edge ID of the edge on which the node is to be added. point SDO_GEOMETRY object (point geometry) representing the node to be added. The point must be an existing shape point or a new point that breaks a line segment connecting two consecutive shape points. x X-axis value of the point representing the node to be added. The point must be an existing shape point or a new point that breaks a line segment connecting two consecutive shape points. 4-10 Oracle Spatial Topology and Network Data Models SDO_TOPO_MAP.ADD_NODE y Y-axis value of the point representing the node to be added. The point must be an existing shape point or a new point that breaks a line segment connecting two consecutive shape points. coord_index The index (position) of the array position in the edge coordinate array on or after which the node is to be added. Each vertex (node or shape point) has a position in the edge coordinate array. The start point (node) is index (position) 0, the first point after the start point is 1, and so on. (However, the coord_index value cannot be the index of the last vertex.) For example, if the edge coordinates are (2,2, 5,2, 8,3) the index of the second vertex (5,2) is 1. is_new_shape_point TRUE if the added node is to be a new shape point following the indexed vertex (coord_index value) of the edge; FALSE if the added node is exactly on the indexed vertex. A value of TRUE lets you add a node at a new point, breaking an edge segment at the coordinates specified in the point parameter or the x and y parameter pair. A value of FALSE causes the coordinates in the point parameter or the x and y parameter pair to be ignored, and causes the node to be added at the existing shape point associated with the coord_index value. Usage Notes Spatial automatically assigns a node ID to the added node and creates a new edge. The split piece at the beginning of the old edge is given the edge ID of the old edge. If topology is not null, appropriate entries are inserted in the _ NODE$ and _EDGE$ tables. (If topology is null, you can update these tables at any time by calling the SDO_TOPO_MAP.UPDATE_TOPO_MAP procedure.) To add an isolated node (that is, an island node), use the SDO_TOPO_MAP.ADD_ ISOLATED_NODE function. For information about adding and deleting nodes and edges, see Chapter 2. This function is equivalent to using the addNode method of the TopoMap class of the client-side Java API (described in Section 1.8.2). Examples The following example adds a non-isolated node to the right of node N2 on edge E2, and it returns the node ID of the added node. It uses the current updatable TopoMap object. (The example refers to definitions and data from Section 1.12.1.) DECLARE result_num NUMBER; BEGIN result_num := SDO_TOPO_MAP.ADD_NODE(null, 2, SDO_GEOMETRY(2001, NULL, SDO_POINT_TYPE(27,30,NULL), NULL, NULL), 0, 'TRUE'); DBMS_OUTPUT.PUT_LINE('Result = ' || result_num); END; / Result = 26 PL/SQL procedure successfully completed. SDO_TOPO_MAP Package Subprograms 4-11 SDO_TOPO_MAP.ADD_POINT_GEOMETRY SDO_TOPO_MAP.ADD_POINT_GEOMETRY Format SDO_TOPO_MAP.ADD_POINT_GEOMETRY( topology IN VARCHAR2, point IN SDO_GEOMETRY ) RETURN NUMBER; or SDO_TOPO_MAP.ADD_POINT_GEOMETRY( topology IN VARCHAR2, coord IN SDO_NUMBER_ARRAY ) RETURN NUMBER; Description Adds a node representing a specified point geometry or coordinate pair, and returns the node ID of the added node. Parameters topology Name of the topology to which to add the node, or null if you are using an updatable TopoMap object (see Section 2.1.2). Must not exceed 20 characters. point SDO_GEOMETRY object (point geometry) representing the node to be added. coord SDO_NUMBER_ARRAY object specifying the coordinates of the node to be added. Usage Notes If the point coincides with an existing node, no changes are made to the topology. Otherwise, an isolated node or a node splitting an edge is added. For information about adding and deleting nodes and edges, see Chapter 2. This function is equivalent to using the addPointGeometry method of the TopoMap class of the client-side Java API (described in Section 1.8.2). Examples The following example adds a node representing a specified point geometry, and it returns the edge ID of the added node. It uses the current updatable TopoMap object. SELECT SDO_TOPO_MAP.ADD_POINT_GEOMETRY(null, SDO_GEOMETRY(2001, NULL, SDO_POINT_TYPE(57,12,NULL), NULL, NULL)) FROM DUAL; SDO_TOPO_MAP.ADD_POINT_GEOMETRY(NULL,SDO_GEOMETRY(2001,NULL,SDO_POINT_TYPE(57,12 -------------------------------------------------------------------------------29 4-12 Oracle Spatial Topology and Network Data Models SDO_TOPO_MAP.ADD_POINT_GEOMETRY The following example adds a node at the specified coordinates (58, 12), and it returns the edge ID of the added node. It uses the current updatable TopoMap object. SELECT SDO_TOPO_MAP.ADD_POINT_GEOMETRY(null, SDO_NUMBER_ARRAY(58,12)) FROM DUAL; SDO_TOPO_MAP.ADD_POINT_GEOMETRY(NULL,SDO_NUMBER_ARRAY(58,12)) ------------------------------------------------------------30 SDO_TOPO_MAP Package Subprograms 4-13 SDO_TOPO_MAP.ADD_POLYGON_GEOMETRY SDO_TOPO_MAP.ADD_POLYGON_GEOMETRY Format SDO_TOPO_MAP.ADD_POLYGON_GEOMETRY( topology IN VARCHAR2, polygon IN SDO_GEOMETRY ) RETURN SDO_NUMBER_ARRAY; or SDO_TOPO_MAP.ADD_POLYGON_GEOMETRY( topology IN VARCHAR2, coords IN SDO_NUMBER_ARRAY ) RETURN SDO_NUMBER_ARRAY; Description Adds one or more faces representing a specified polygon geometry, and returns the face ID of each added face. Parameters topology Name of the topology to which to add the face or faces, or null if you are using an updatable TopoMap object (see Section 2.1.2). Must not exceed 20 characters. polygon SDO_GEOMETRY object (polygon or multipolygon geometry) representing the face or faces to be added. Each polygon in the object must have a single exterior ring that can contain any number of interior rings. coords SDO_NUMBER_ARRAY object specifying the coordinates of a single polygon geometry representing the face or faces to be added. The vertices of the polygon must be in counterclockwise order, with the last vertex the same as the first vertex. Usage Notes This function creates at least one new face, and more faces if necessary. For example, if the polygon geometry intersects an existing face, faces are created for the added polygon, and the existing face (the one being intersected) definition is adjusted. If topology is not null, Spatial automatically updates the _FACE$ table as needed. (If topology is null, you can update this table at any time by calling the SDO_TOPO_MAP.UPDATE_TOPO_MAP procedure.) If the polygon coincides with an existing face, no changes are made to the topology. For a multipolygon geometry, no exterior ring may overlap any other exterior ring. For example, you cannot add a face representing the following single multipolygon geometry: a park (exterior ring) containing a lake (interior ring) with an island in the lake (exterior ring inside the preceding interior ring). 4-14 Oracle Spatial Topology and Network Data Models SDO_TOPO_MAP.ADD_POLYGON_GEOMETRY This function is equivalent to using the addPolygonGeometry method of the TopoMap class of the client-side Java API (described in Section 1.8.2). Examples The following example adds a face representing a specified polygon geometry, and it returns and prints the face ID of the added edge. It uses the current updatable TopoMap object. DECLARE res_number_array SDO_NUMBER_ARRAY; face_count NUMBER; face_ctr NUMBER; this_face NUMBER; BEGIN res_number_array := SDO_TOPO_MAP.ADD_POLYGON_GEOMETRY(null, SDO_GEOMETRY(2003, NULL, NULL, SDO_ELEM_INFO_ARRAY(1,1003,1), SDO_ORDINATE_ARRAY(61,10, 70,10, 70,15, 65,15, 61,10))); -- DBMS_OUTPUT.PUT_LINE('Result = ' || res_number_array); -- Print each face associated with the geometry. face_count := res_number_array.count; for face_ctr in 1..face_count loop this_face := res_number_array(face_ctr); dbms_output.put_line ('this face = '|| this_face); end loop; -- printed each face END; / this face = 12 SDO_TOPO_MAP Package Subprograms 4-15 SDO_TOPO_MAP.CHANGE_EDGE_COORDS SDO_TOPO_MAP.CHANGE_EDGE_COORDS Format SDO_TOPO_MAP.CHANGE_EDGE_COORDS( topology IN VARCHAR2, edge_id IN NUMBER, geom IN SDO_GEOMETRY); or SDO_TOPO_MAP.CHANGE_EDGE_COORDS( topology IN VARCHAR2, edge_id IN NUMBER, geom IN SDO_GEOMETRY, moved_iso_nodes OUT SDO_NUMBER_ARRAY, moved_iso_edges OUT SDO_NUMBER_ARRAY, allow_iso_moves IN VARCHAR2); Description Changes the coordinates and related information about an edge. Parameters topology Name of the topology containing the edge, or null if you are using an updatable TopoMap object (see Section 2.1.2). Must not exceed 20 characters. edge_id Edge ID of the edge whose coordinates are to be changed. geom SDO_GEOMETRY object (line or contiguous line string geometry) representing the modified edge. The start and end points of the modified edge must be the same as for the original edge. moved_iso_nodes Output parameter in which, if the allow_iso_moves parameter value is TRUE, Spatial stores the node ID values of any isolated nodes that have moved to a different face as a result of this procedure. If the allow_iso_moves parameter value is FALSE, Spatial stores the node ID values of any isolated nodes that did not move but that would have moved to a different face if the allow_iso_moves parameter value had been TRUE. moved_iso_edges Output parameter in which, if the allow_iso_moves parameter value is TRUE, Spatial stores the edge ID values of any isolated edges that have moved to a different face as a result of this procedure. If the allow_iso_moves parameter value is FALSE, Spatial stores the edge ID values of any isolated edges that did not move but that 4-16 Oracle Spatial Topology and Network Data Models SDO_TOPO_MAP.CHANGE_EDGE_COORDS would have moved to a different face if the allow_iso_moves parameter value had been TRUE. allow_iso_moves TRUE causes Spatial to allow an edge coordinates change operation that would cause any isolated nodes or edges to be in a different face, and to adjust the containing face information for such isolated nodes and edges; FALSE causes Spatial not to allow an edge coordinates change operation that would cause any isolated nodes or edges to be in a different face. If you use the format that does not include the allow_iso_moves parameter, Spatial allows edge move operations that would cause any isolated nodes or edges to be in a different face, and it adjusts the containing face information for such isolated nodes and edges. Usage Notes If this procedure modifies a boundary between faces, Spatial automatically performs the following operations and updates the topology data model tables as needed: reassigning island nodes and faces, and adjusting the MBRs of the faces on both sides. If topology is not null, this procedure modifies the information about the specified edge in the _EDGE$ table (described in Section 1.5.1). (If topology is null, you can update this table at any time by calling the SDO_TOPO_ MAP.UPDATE_TOPO_MAP procedure.) You cannot use this procedure to change the start point or the end point, or both, of the specified edge. To do any of these operations, you must delete the edge, delete the node or nodes for the start or end point (or both) to be changed, add the necessary new node or nodes, and add the edge. For information about editing topological elements, see Chapter 2. This procedure is equivalent to using the changeEdgeCoords method of the TopoMap class of the client-side Java API (described in Section 1.8.2). Examples The following example changes the coordinates of edge E1. (It changes only the third point, from 16,38 to 16,39.) It uses the current updatable TopoMap object. (The example refers to definitions and data from Section 1.12.1.) CALL SDO_TOPO_MAP.CHANGE_EDGE_COORDS(null, 1, SDO_GEOMETRY(2002, NULL, NULL, SDO_ELEM_INFO_ARRAY(1, 2, 1), SDO_ORDINATE_ARRAY(8,30, 16,30, 16,39, 3,38, 3,30, 8,30))); SDO_TOPO_MAP Package Subprograms 4-17 SDO_TOPO_MAP.CLEAR_TOPO_MAP SDO_TOPO_MAP.CLEAR_TOPO_MAP Format SDO_TOPO_MAP.CLEAR_TOPO_MAP( topo_map IN VARCHAR2); Description Clears all objects and changes in the cache associated with a TopoMap object. Parameters topo_map Name of the TopoMap object. (TopoMap objects are explained in Section 2.1.1.) Usage Notes If the TopoMap object is updatable, this procedure changes it to be read-only. For information about using an in-memory cache to edit topological elements, see Section 2.1. Contrast this procedure with the SDO_TOPO_MAP.UPDATE_TOPO_MAP procedure, which applies the changes in the cache associated with the TopoMap object to the topology. You cannot call the SDO_TOPO_MAP.CLEAR_TOPO_MAP procedure if you previously used the SDO_TOPO_MAP.UPDATE_TOPO_MAP procedure on the specified TopoMap object. This procedure is equivalent to using the clearCache method of the TopoMap class of the client-side Java API (described in Section 1.8.2). Examples The following example clears the cache associated with the TopoMap object named CITY_DATA_TOPOMAP, which is associated with the topology named CITY_DATA. (The example refers to definitions and data from Section 1.12.1.) CALL SDO_TOPO_MAP.CLEAR_TOPO_MAP('CITY_DATA_TOPOMAP'); 4-18 Oracle Spatial Topology and Network Data Models SDO_TOPO_MAP.COMMIT_TOPO_MAP SDO_TOPO_MAP.COMMIT_TOPO_MAP Format SDO_TOPO_MAP.COMMIT_TOPO_MAP; Description Updates the topology to reflect changes made to the current updatable TopoMap object, commits all changes to the database, and makes the TopoMap object read-only. Parameters None. Usage Notes Use this procedure when you are finished with a batch of edits to a topology and you want to commit all changes to the database. After the commit operation completes, you cannot edit the TopoMap object. To make further edits to the topology, you must either clear the cache (using the SDO_TOPO_MAP.CLEAR_TOPO_MAP procedure) or create a new TopoMap object (using the SDO_TOPO_MAP.CREATE_TOPO_MAP procedure), and then load the topology into the TopoMap object for update (using the SDO_TOPO_MAP.LOAD_TOPO_MAP function or procedure). Contrast this procedure with the SDO_TOPO_MAP.UPDATE_TOPO_MAP procedure, which leaves the TopoMap object available for editing operations and which does not perform a commit operation (and thus does not end the database transaction). To roll back all TopoMap object changes, use the SDO_TOPO_MAP.ROLLBACK_ TOPO_MAP procedure. For information about using an in-memory cache to edit topological elements, see Section 2.1. This procedure is equivalent to using the commitDB method of the TopoMap class of the client-side Java API (described in Section 1.8.2). Examples The following example commits to the database all changes to the current updatable TopoMap object, and prevents further editing of the TopoMap object. EXECUTE SDO_TOPO_MAP.COMMIT_TOPO_MAP; SDO_TOPO_MAP Package Subprograms 4-19 SDO_TOPO_MAP.CREATE_EDGE_INDEX SDO_TOPO_MAP.CREATE_EDGE_INDEX Format SDO_TOPO_MAP.CREATE_EDGE_INDEX( topo_map IN VARCHAR2); Description Creates an internal R-tree index (or rebuilds the index if one already exists) on the edges in the cache associated with a TopoMap object. Parameters topo_map Name of the TopoMap object. (TopoMap objects are explained in Section 2.1.1.) Usage Notes You can cause Spatial to create in-memory R-tree indexes to be built on the edges and faces in the specified TopoMap object. These indexes use some memory resources and take some time to create; however, they significantly improve performance if you edit a large number of topological elements in the session. They can also improve performance for queries that use a read-only TopoMap object. If the TopoMap object is updatable and if you are performing many editing operations, you should probably rebuild the indexes periodically; however, if the TopoMap object will not be updated, create the indexes when or after loading the read-only TopoMap object or after calling the SDO_TOPO_MAP.COMMIT_TOPO_MAP procedure. Compare this procedure with the SDO_TOPO_MAP.CREATE_FACE_INDEX procedure, which creates an internal R-tree index (or rebuilds the index if one already exists) on the faces in the cache associated with a TopoMap object. This procedure is equivalent to using the createEdgeIndex method of the TopoMap class of the client-side Java API (described in Section 1.8.2). Examples The following example creates an internal R-tree index (or rebuilds the index if one already exists) on the edges in the cache associated with the TopoMap object named CITY_DATA_TOPOMAP, which is associated with the topology named CITY_DATA. (The example refers to definitions and data from Section 1.12.1.) CALL SDO_TOPO_MAP.CREATE_EDGE_INDEX('CITY_DATA_TOPOMAP'); 4-20 Oracle Spatial Topology and Network Data Models SDO_TOPO_MAP.CREATE_FACE_INDEX SDO_TOPO_MAP.CREATE_FACE_INDEX Format SDO_TOPO_MAP.CREATE_FACE_INDEX( topo_map IN VARCHAR2); Description Creates an internal R-tree index (or rebuilds the index if one already exists) on the faces in the cache associated with a TopoMap object. Parameters topo_map Name of the TopoMap object. (TopoMap objects are explained in Section 2.1.1.) Usage Notes You can cause Spatial to create in-memory R-tree indexes to be built on the edges and faces in the specified TopoMap object. These indexes use some memory resources and take some time to create; however, they significantly improve performance if you edit a large number of topological elements in the session. They can also improve performance for queries that use a read-only TopoMap object. If the TopoMap object is updatable and if you are performing many editing operations, you should probably rebuild the indexes periodically; however, if the TopoMap object will not be updated, create the indexes when or after loading the read-only TopoMap object or after calling the SDO_TOPO_MAP.COMMIT_TOPO_MAP procedure. Compare this procedure with the SDO_TOPO_MAP.CREATE_EDGE_INDEX procedure, which creates an internal R-tree index (or rebuilds the index if one already exists) on the edges in the cache associated with a TopoMap object. This procedure is equivalent to using the createFaceIndex method of the TopoMap class of the client-side Java API (described in Section 1.8.2). Examples The following example creates an internal R-tree index (or rebuilds the index if one already exists) on the faces in the cache associated with the TopoMap object named CITY_DATA_TOPOMAP, which is associated with the topology named CITY_DATA. (The example refers to definitions and data from Section 1.12.1.) CALL SDO_TOPO_MAP.CREATE_FACE_INDEX('CITY_DATA_TOPOMAP'); SDO_TOPO_MAP Package Subprograms 4-21 SDO_TOPO_MAP.CREATE_FEATURE SDO_TOPO_MAP.CREATE_FEATURE Format (no topology geometry layer hierarchy or lowest level in a hierarchy) SDO_TOPO_MAP.CREATE_FEATURE( topology IN VARCHAR2, table_name IN VARCHAR2, column_name IN VARCHAR2, geom IN SDO_GEOMETRY ) RETURN SDO_TOPO_GEOMETRY; Format (parent level in a hierarchy) SDO_TOPO_MAP.CREATE_FEATURE( topology IN VARCHAR2, table_name IN VARCHAR2, column_name IN VARCHAR2, dml_condition IN VARCHAR2 ) RETURN SDO_TOPO_GEOMETRY; Description Creates a feature from Oracle Spatial geometries. (This function is intended to be used for inserting rows into a feature table.) ■ ■ The first format (with the geom parameter and without the dml_condition parameter) is for creating a feature in a topology without a topology geometry layer hierarchy or in the lowest level of a topology with a topology geometry layer hierarchy. The second format (with the dml_condition parameter and without the geom parameter) is for creating a feature in a parent level of a topology with a topology geometry layer hierarchy. Parameters topology Topology having the associated specified feature table and feature column. table_name Name of the feature table containing the feature column specified in column_name. column_name Name of the feature column (of type SDO_TOPO_GEOMETRY) containing the topology geometries. geom Geometry objects. 4-22 Oracle Spatial Topology and Network Data Models SDO_TOPO_MAP.CREATE_FEATURE dml_condition For topologies with a topology geometry layer hierarchy (described in Section 1.4): DML condition for selecting rows from a child layer to be inserted into a parent layer. Specify the condition in a quoted string, but without the word WHERE. For example, to select only rows where the STATE_ABBR column value is MA, specify the following: 'state_abbr=''MA''' Usage Notes This function is used to create features from existing geometries stored in a spatial table. Creating features from existing geometries is one approach to creating topology features; the other approach is to load the topology data into the node, edge, and face information tables. Both approaches are described in Section 1.1, which contains the following subsections: ■ ■ Section 1.1.1, "Using a Topology Built from Topology Data" Section 1.1.2, "Using a Topology Built from Spatial Geometries" (that is, the approach using the CREATE_FEATURE function) When you use the first format of this function, you must first create and load an updatable TopoMap object. To create a topology feature or an associated topological element, the function internally calls the addPointGeometry, addLinearGeometry, or addPolygonGeometry method of the updatable TopoMap object, depending on the SDO_GTYPE value of the geometry object, and it calls the updateTopology method of the updatable TopoMap object to write topological elements to the database. If this function is called in an INSERT or UPDATE statement, a feature is created or updated in the feature table. When the function completes, it has the effect of overlaying the geometry onto the topology. When you use the second format of this function, you do not need to create an updatable TopoMap object. The function internally collects TG_ID values of features in the child level based on the dml_condition parameter value, and it assembles an SDO_TGL_OBJECT_ARRAY object to create the SDO_GEOMETRY object. To ensure that this function works correctly with all geometries, use a loop to call the function for each geometry. Do not use this function in a subquery in an INSERT or UPDATE statement, because doing so may cause inconsistencies in the topology, and you may not receive any error or warning messages about the inconsistencies. An exception is raised if one or more of the following conditions exist: ■ ■ ■ topology, table_name, or column_name does not exist. geom specifies geometry objects of a type inconsistent with the topology geometry layer type. For example, you cannot use line string geometries to create land parcel features. dml_condition is used with a topology that does not have a topology geometry layer hierarchy. ■ A line string or multiline string geometry contains any overlapping line segments. ■ In a multipolygon geometry, an exterior ring overlaps any other exterior ring. Examples The following example populates the FEATURE column in the CITY_STREETS, TRAFFIC_SIGNS, and LAND_PARCELS feature tables with all geometries in the GEOMETRY column in the CITY_STREETS_GEOM, TRAFFIC_SIGNS_GEOM, and LAND_PARCELS_GEOM spatial tables, respectively. This example assumes that an SDO_TOPO_MAP Package Subprograms 4-23 SDO_TOPO_MAP.CREATE_FEATURE updatable TopoMap object has been created and loaded for the CITY_DATA topology. (The example refers to definitions and data from Section 1.12.2.) BEGIN FOR street_rec IN (SELECT name, geometry FROM city_streets_geom) LOOP INSERT INTO city_streets VALUES(street_rec.name, SDO_TOPO_MAP.CREATE_FEATURE('CITY_DATA', 'CITY_STREETS', 'FEATURE', street_rec.geometry)); END LOOP; FOR sign_rec IN (SELECT name, geometry FROM traffic_signs_geom) LOOP INSERT INTO traffic_signs VALUES(sign_rec.name, SDO_TOPO_MAP.CREATE_FEATURE('CITY_DATA', 'TRAFFIC_SIGNS', 'FEATURE', sign_rec.geometry)); END LOOP; FOR parcel_rec IN (SELECT name, geometry FROM land_parcels_geom) LOOP INSERT INTO land_parcels VALUES(parcel_rec.name, SDO_TOPO_MAP.CREATE_FEATURE('CITY_DATA', 'LAND_PARCELS', 'FEATURE', parcel_rec.geometry)); END LOOP; END; / The following example creates a topology that has a topology geometry layer hierarchy with two layers: counties and states. The calls to the CREATE_FEATURE function that create parent layer (state) features include the dml_condition parameter (for example, 'p_name=''NH'''). declare name varchar2(64); cursor c1 is select state_abrv, county from counties order by 1, 2; stateabrv varchar2(2); begin -- Initialize. sdo_topo_map.create_topo_map('cnty', 'm2', 10000, 10000, 10000); sdo_topo_map.load_topo_map('m2', -180, -90, 180, 90, 'true'); -- Insert one county at a time. for cnty_rec in c1 loop stateabrv := cnty_rec.state_abrv; name := cnty_rec.county; insert into cnty_areas select state_abrv || '-' ||county, sdo_topo_map.create_feature('CNTY', 'CNTY_AREAS', 'FEATURE', geom) from counties where state_abrv=stateabrv and county=name; end loop; -- Roll back topology. sdo_topo_map.rollback_topo_map(); sdo_topo_map.drop_topo_map('m2'); -- Roll back inserts. rollback; exception when others then dbms_output.put_line(SQLERRM); sdo_topo_map.rollback_topo_map(); sdo_topo_map.drop_topo_map('m2'); 4-24 Oracle Spatial Topology and Network Data Models SDO_TOPO_MAP.CREATE_FEATURE rollback; end; / -- Add parent feature layer. --The following commented out statement can be used to populate the -child_layer_id parameter in sdo_topo.add_topo_geometry_layer. --select tg_layer_id -from user_sdo_topo_info -where TOPOLOGY = 'SC' -and table_name = 'SC_AREAS'; -execute sdo_topo.add_topo_geometry_layer('SC','SC_P_AREAS', 'FEATURE', 'POLYGON', NULL, child_layer_id => 1); -- Create and insert state features (logically) from county features. insert into sc_p_areas (f_name, p_name, feature) values ('NH', 'US', sdo_topo_map.create_feature('SC','SC_P_AREAS','FEATURE','p_name=''NH''')); insert into sc_p_areas (f_name, p_name, feature) values ('CT', 'US', sdo_topo_map.create_feature('SC','SC_P_AREAS','FEATURE','p_name=''CT''')); insert into sc_p_areas (f_name, p_name, feature) values ('ME', 'US', sdo_topo_map.create_feature('SC','SC_P_AREAS','FEATURE','p_name=''ME''')); insert into sc_p_areas (f_name, p_name, feature) values ('MA', 'US', sdo_topo_map.create_feature('SC','SC_P_AREAS','FEATURE','p_name=''MA''')); commit; SDO_TOPO_MAP Package Subprograms 4-25 SDO_TOPO_MAP.CREATE_TOPO_MAP SDO_TOPO_MAP.CREATE_TOPO_MAP Format SDO_TOPO_MAP.CREATE_TOPO_MAP( topology IN VARCHAR2, topo_map IN VARCHAR2, number_of_edges IN NUMBER DEFAULT 100, number_of_nodes IN NUMBER DEFAULT 80, number_of_faces IN NUMBER DEFAULT 30); Description Creates a TopoMap object cache associated with an existing topology. Parameters topology Name of the topology. Must not exceed 20 characters. topo_map Name of the TopoMap object. (TopoMap objects are explained in Section 2.1.1.) number_of_edges An estimate of the maximum number of edges that will be in the TopoMap object at any given time. If you do not specify this parameter, a default value of 100 is used. number_of_nodes An estimate of the maximum number of nodes that will be in the TopoMap object at any given time. If you do not specify this parameter, a default value of 80 is used. number_of_faces An estimate of the maximum number of faces that will be in the TopoMap object at any given time. If you do not specify this parameter, a default value of 30 is used. Usage Notes The number_of_edges, number_of_nodes, and number_of_faces parameters let you improve the performance and memory usage of the procedure when you have a good idea of the approximate number of edges, nodes, or faces (or any combination) that will be placed in the cache associated with the specified TopoMap object. Spatial initially allocates memory cache for the specified or default number of objects of each type, and incrementally increases the allocation later if more objects need to be accommodated. You can create more than one TopoMap object in a user session; however, there can be no more than one updatable TopoMap object at any given time in a user session. For information about using an in-memory cache to edit topological elements, see Section 2.1. Using this procedure is equivalent to calling the constructor of the TopoMap class of the client-side Java API (described in Section 1.8.2). 4-26 Oracle Spatial Topology and Network Data Models SDO_TOPO_MAP.CREATE_TOPO_MAP Examples The following example creates a TopoMap object named CITY_DATA_TOPOMAP and its associated cache, and it associates the TopoMap object with the topology named CITY_DATA. (The example refers to definitions and data from Section 1.12.1.) CALL SDO_TOPO_MAP.CREATE_TOPO_MAP('CITY_DATA', 'CITY_DATA_TOPOMAP'); SDO_TOPO_MAP Package Subprograms 4-27 SDO_TOPO_MAP.DROP_TOPO_MAP SDO_TOPO_MAP.DROP_TOPO_MAP Format SDO_TOPO_MAP.DROP_TOPO_MAP( topo_map IN VARCHAR2); Description Deletes a TopoMap object from the current user session. Parameters topo_map Name of the TopoMap object. (TopoMap objects are explained in Section 2.1.1.) Usage Notes This procedure rolls back any uncommitted changes if the TopoMap object is updatable (that is, performs the equivalent of an SDO_TOPO_MAP.ROLLBACK_ TOPO_MAP operation). It clears the cache associated with the TopoMap object, and removes the TopoMap object from the session. For information about using an in-memory cache to edit topological elements, see Section 2.1. Using this procedure is equivalent to setting the variable of the TopoMap object to a null value in a client-side Java application. (The client-side Java API is described in Section 1.8.2.) Examples The following example drops the TopoMap object named CITY_DATA_TOPOMAP. (The example refers to definitions and data from Section 1.12.1.) CALL SDO_TOPO_MAP.DROP_TOPO_MAP('CITY_DATA_TOPOMAP'); 4-28 Oracle Spatial Topology and Network Data Models SDO_TOPO_MAP.GET_CONTAINING_FACE SDO_TOPO_MAP.GET_CONTAINING_FACE Format SDO_TOPO_MAP.GET_CONTAINING_FACE( topology IN VARCHAR2, topo_map IN VARCHAR2, point IN SDO_GEOMETRY ) RETURN NUMBER; or SDO_TOPO_MAP.GET_CONTAINING_FACE( topology IN VARCHAR2, topo_map IN VARCHAR2, x IN NUMBER, y IN NUMBER ) RETURN NUMBER; Description Returns the face ID number of the face that contains the specified point. Parameters topology Name of the topology that contains the face and the point, or a null value, as explained in Section 2.1.3. Must not exceed 20 characters. topo_map Name of the TopoMap object, or a null value, as explained in Section 2.1.3. (TopoMap objects are explained in Section 2.1.1.) point Geometry object specifying the point. x X-axis value of the point. y Y-axis value of the point. Usage Notes The topology or topo_map parameter should specify a valid name, as explained in Section 2.1.3. This function determines, from the faces in the specified TopoMap object (including any island faces), which one face (if any) contains the specified point in its open set, excluding islands. (The open set, excluding islands, of a face consists of all points inside, but not on the boundary of, the face.) If the point is exactly on the boundary of a face, the function returns a value of 0 (zero). SDO_TOPO_MAP Package Subprograms 4-29 SDO_TOPO_MAP.GET_CONTAINING_FACE If the entire topology has been loaded into the TopoMap object and if the point is not in any finite face in the cache, this function returns a value of -1 (for the universe face). If a window from the topology has been loaded into the TopoMap object and if the point is not in any finite face in the cache, this function returns a value of -1 (for the universe face) if the point is inside the window and a value of 0 (zero) if the point is outside the window. If neither the entire topology nor a window has been loaded, this function returns 0 (zero). This function is equivalent to using the getContainingFace method of the TopoMap class of the client-side Java API (described in Section 1.8.2). Examples The following example returns the face ID number of the face that contains the point at (22, 37) in the CITY_DATA_TOPOMAP TopoMap object. (The example refers to definitions and data from Section 1.12.1.) SELECT SDO_TOPO_MAP.GET_CONTAINING_FACE(null, 'CITY_DATA_TOPOMAP', SDO_GEOMETRY(2001, NULL, SDO_POINT_TYPE(22,37,NULL), NULL, NULL)) FROM DUAL; SDO_TOPO_MAP.GET_CONTAINING_FACE(NULL,'CITY_DATA_TOPOMAP',SDO_GEOMETRY(2001,NULL -------------------------------------------------------------------------------2 4-30 Oracle Spatial Topology and Network Data Models SDO_TOPO_MAP.GET_EDGE_ADDITIONS SDO_TOPO_MAP.GET_EDGE_ADDITIONS Format SDO_TOPO_MAP.GET_EDGE_ADDITIONS() RETURN SDO_NUMBER_ARRAY; Description Returns an array of edge ID numbers of edges that have been added to the current updatable TopoMap object. Parameters None. Usage Notes This function returns the edge ID numbers of edges in the current updatable TopoMap object that have been added since the object was most recently loaded (using SDO_ TOPO_MAP.LOAD_TOPO_MAP), updated (using SDO_TOPO_MAP.UPDATE_ TOPO_MAP), cleared (using SDO_TOPO_MAP.CLEAR_TOPO_MAP), committed (using SDO_TOPO_MAP.COMMIT_TOPO_MAP), or rolled back (using SDO_TOPO_ MAP.ROLLBACK_TOPO_MAP). If there have been no additions during that time, the function returns an empty SDO_NUMBER_ARRAY object. This function is equivalent to using the getEdgeAdditions method of the TopoMap class of the client-side Java API (described in Section 1.8.2). Examples The following example returns the edge ID numbers of edges that have been added to the current updatable TopoMap object. SELECT SDO_TOPO_MAP.GET_EDGE_ADDITIONS FROM DUAL; GET_EDGE_ADDITIONS -------------------------------------------------------------------------------SDO_NUMBER_ARRAY(28, 29, 30, 32) SDO_TOPO_MAP Package Subprograms 4-31 SDO_TOPO_MAP.GET_EDGE_CHANGES SDO_TOPO_MAP.GET_EDGE_CHANGES Format SDO_TOPO_MAP.GET_EDGE_CHANGES() RETURN SDO_NUMBER_ARRAY; Description Returns an array of edge ID numbers of edges that have been changed (modified) in the current updatable TopoMap object. Parameters None. Usage Notes This function returns the edge ID numbers of edges in the current updatable TopoMap object that have been changed since the object was most recently loaded (using SDO_ TOPO_MAP.LOAD_TOPO_MAP), updated (using SDO_TOPO_MAP.UPDATE_ TOPO_MAP), cleared (using SDO_TOPO_MAP.CLEAR_TOPO_MAP), committed (using SDO_TOPO_MAP.COMMIT_TOPO_MAP), or rolled back (using SDO_TOPO_ MAP.ROLLBACK_TOPO_MAP). If there have been no changes during that time, the function returns an empty SDO_NUMBER_ARRAY object. This function is equivalent to using the getEdgeChanges method of the TopoMap class of the client-side Java API (described in Section 1.8.2). Examples The following example returns the edge ID numbers of edges that have been changed in the current updatable TopoMap object. SELECT SDO_TOPO_MAP.GET_EDGE_CHANGES FROM DUAL; GET_EDGE_CHANGES -------------------------------------------------------------------------------SDO_NUMBER_ARRAY(3, 2, 1) 4-32 Oracle Spatial Topology and Network Data Models SDO_TOPO_MAP.GET_EDGE_COORDS SDO_TOPO_MAP.GET_EDGE_COORDS Format SDO_TOPO_MAP.GET_EDGE_COORDS( topology IN VARCHAR2, topo_map IN VARCHAR2, edge_id IN NUMBER ) RETURN SDO_NUMBER_ARRAY; Description Returns an array with the coordinates of the start node, shape points, and end node for the specified edge. Parameters topology Name of the topology that contains the edge, or a null value, as explained in Section 2.1.3. Must not exceed 20 characters. topo_map Name of the TopoMap object, or a null value, as explained in Section 2.1.3. (TopoMap objects are explained in Section 2.1.1.) edge_id Edge ID value of the edge. Usage Notes The topology or topo_map parameter should specify a valid name, as explained in Section 2.1.3. This function is equivalent to using the getEdgeCoords method of the TopoMap class of the client-side Java API (described in Section 1.8.2). Examples The following example returns the coordinates of the start node, shape points, and end node for the edge whose edge ID value is 1. The returned array contains coordinates for six points. (The example refers to definitions and data from Section 1.12.1.) SELECT SDO_TOPO_MAP.GET_EDGE_COORDS(null, 'CITY_DATA_TOPOMAP', 1) FROM DUAL; SDO_TOPO_MAP.GET_EDGE_COORDS(NULL,'CITY_DATA_TOPOMAP',1) -------------------------------------------------------------------------------SDO_NUMBER_ARRAY(8, 30, 16, 30, 16, 38, 3, 38, 3, 30, 8, 30) SDO_TOPO_MAP Package Subprograms 4-33 SDO_TOPO_MAP.GET_EDGE_DELETIONS SDO_TOPO_MAP.GET_EDGE_DELETIONS Format SDO_TOPO_MAP.GET_EDGE_DELETIONS() RETURN SDO_NUMBER_ARRAY; Description Returns an array of edge ID numbers of edges that have been deleted from the current updatable TopoMap object. Parameters None. Usage Notes This function returns the edge ID numbers of edges in the current updatable TopoMap object that have been deleted since the object was most recently loaded (using SDO_ TOPO_MAP.LOAD_TOPO_MAP), updated (using SDO_TOPO_MAP.UPDATE_ TOPO_MAP), cleared (using SDO_TOPO_MAP.CLEAR_TOPO_MAP), committed (using SDO_TOPO_MAP.COMMIT_TOPO_MAP), or rolled back (using SDO_TOPO_ MAP.ROLLBACK_TOPO_MAP). If there have been no deletions during that time, the function returns an empty SDO_NUMBER_ARRAY object. This function is equivalent to using the getEdgeDeletions method of the TopoMap class of the client-side Java API (described in Section 1.8.2). Examples The following example returns the edge ID numbers of edges that have been deleted from the current updatable TopoMap object. In this case, the return of an empty SDO_ NUMBER_ARRAY object indicates that no edges have been deleted. SELECT SDO_TOPO_MAP.GET_EDGE_DELETIONS FROM DUAL; GET_EDGE_DELETIONS -------------------------------------------------------------------------------SDO_NUMBER_ARRAY() 4-34 Oracle Spatial Topology and Network Data Models SDO_TOPO_MAP.GET_EDGE_NODES SDO_TOPO_MAP.GET_EDGE_NODES Format SDO_TOPO_MAP.GET_EDGE_NODES( topology IN VARCHAR2, topo_map IN VARCHAR2, edge_id IN NUMBER ) RETURN SDO_NUMBER_ARRAY; Description Returns an array with the ID numbers of the start and end nodes on the specified edge. Parameters topology Name of the topology that contains the edge, or a null value, as explained in Section 2.1.3. Must not exceed 20 characters. topo_map Name of the TopoMap object, or a null value, as explained in Section 2.1.3. (TopoMap objects are explained in Section 2.1.1.) edge_id Edge ID value of the edge. Usage Notes The topology or topo_map parameter should specify a valid name, as explained in Section 2.1.3. If the edge starts and ends at a node, the ID number of the node is the first and last number in the array. This function has no exact equivalent method in the TopoMap class of the client-side Java API (described in Section 1.8.2). The getEdge method returns a Java edge object of the oracle.spatial.topo.Edge class. Examples The following example returns the ID numbers of the nodes on the edge whose edge ID value is 1. The returned array contains two nodes ID numbers, both of them 1 (for the same node), because the specified edge starts and ends at the node with node ID 1 and has a loop edge. (The example refers to definitions and data from Section 1.12.1.) SELECT SDO_TOPO_MAP.GET_EDGE_NODES(null, 'CITY_DATA_TOPOMAP', 1) FROM DUAL; SDO_TOPO_MAP.GET_EDGE_NODES(NULL,'CITY_DATA_TOPOMAP',1) -------------------------------------------------------------------------------SDO_NUMBER_ARRAY(1, 1) SDO_TOPO_MAP Package Subprograms 4-35 SDO_TOPO_MAP.GET_FACE_ADDITIONS SDO_TOPO_MAP.GET_FACE_ADDITIONS Format SDO_TOPO_MAP.GET_FACE_ADDITIONS() RETURN SDO_NUMBER_ARRAY Description Returns an array of face ID numbers of faces that have been added to the current updatable TopoMap object. Parameters None. Usage Notes This function returns the face ID numbers of faces in the current updatable TopoMap object that have been added since the object was most recently loaded (using SDO_ TOPO_MAP.LOAD_TOPO_MAP), updated (using SDO_TOPO_MAP.UPDATE_ TOPO_MAP), cleared (using SDO_TOPO_MAP.CLEAR_TOPO_MAP), committed (using SDO_TOPO_MAP.COMMIT_TOPO_MAP), or rolled back (using SDO_TOPO_ MAP.ROLLBACK_TOPO_MAP). If there have been no additions during that time, the function returns an empty SDO_NUMBER_ARRAY object. This function is equivalent to using the getFaceAdditions method of the TopoMap class of the client-side Java API (described in Section 1.8.2). Examples The following example returns the face ID numbers of faces that have been added to the current updatable TopoMap object. SELECT SDO_TOPO_MAP.GET_FACE_ADDITIONS FROM DUAL; GET_FACE_ADDITIONS -------------------------------------------------------------------------------SDO_NUMBER_ARRAY(11) 4-36 Oracle Spatial Topology and Network Data Models SDO_TOPO_MAP.GET_FACE_CHANGES SDO_TOPO_MAP.GET_FACE_CHANGES Format SDO_TOPO_MAP.GET_FACE_CHANGES() RETURN SDO_NUMBER_ARRAY; Description Returns an array of face ID numbers of faces that have been changed (modified) in the current updatable TopoMap object. Parameters None. Usage Notes This function returns the face ID numbers of faces in the current updatable TopoMap object that have been changed since the object was most recently loaded (using SDO_ TOPO_MAP.LOAD_TOPO_MAP), updated (using SDO_TOPO_MAP.UPDATE_ TOPO_MAP), cleared (using SDO_TOPO_MAP.CLEAR_TOPO_MAP), committed (using SDO_TOPO_MAP.COMMIT_TOPO_MAP), or rolled back (using SDO_TOPO_ MAP.ROLLBACK_TOPO_MAP). If there have been no changes during that time, the function returns an empty SDO_NUMBER_ARRAY object. This function is equivalent to using the getFaceChanges method of the TopoMap class of the client-side Java API (described in Section 1.8.2). Examples The following example returns the face ID numbers of faces that have been changed in the current updatable TopoMap object. SELECT SDO_TOPO_MAP.GET_FACE_CHANGES FROM DUAL; GET_FACE_CHANGES -------------------------------------------------------------------------------SDO_NUMBER_ARRAY(2, 1, -1) SDO_TOPO_MAP Package Subprograms 4-37 SDO_TOPO_MAP.GET_FACE_BOUNDARY SDO_TOPO_MAP.GET_FACE_BOUNDARY Format SDO_TOPO_MAP.GET_FACE_BOUNDARY( topology IN VARCHAR2, topo_map IN VARCHAR2, face_id IN NUMBER option IN NUMBER ) RETURN SDO_NUMBER_ARRAY; Description Returns an array with the edge ID numbers of the edges that make up the boundary for the specified face. Parameters topology Name of the topology that contains the face, or a null value, as explained in Section 2.1.3. Must not exceed 20 characters. topo_map Name of the TopoMap object, or a null value, as explained in Section 2.1.3. (TopoMap objects are explained in Section 2.1.1.) face_id Face ID value of the face. option One of the following numbers to indicate an option for computing the boundary: 0 for an external boundary ring without spurs (that is, without doubly traced edges), 1 for external and internal rings without spurs, or 2 for external and internal rings with spurs. A value of 2 returns the full, though possibly degenerate, boundary. Usage Notes The topology or topo_map parameter should specify a valid name, as explained in Section 2.1.3. This function is equivalent to using the getFaceBoundary method of the TopoMap class of the client-side Java API (described in Section 1.8.2). Examples The following example returns the edges in the external boundary ring without spurs for the face whose face ID value is 3. The returned array contains four edge ID values. (The example refers to definitions and data from Section 1.12.1.) SELECT SDO_TOPO_MAP.GET_FACE_BOUNDARY(null, 'CITY_DATA_TOPOMAP', 3, 0) FROM DUAL; SDO_TOPO_MAP.GET_FACE_BOUNDARY(NULL,'CITY_DATA_TOPOMAP',3,0) -------------------------------------------------------------------------------SDO_NUMBER_ARRAY(19, 6, 21, 9) 4-38 Oracle Spatial Topology and Network Data Models SDO_TOPO_MAP.GET_FACE_DELETIONS SDO_TOPO_MAP.GET_FACE_DELETIONS Format SDO_TOPO_MAP.GET_FACE_DELETIONS() RETURN SDO_NUMBER_ARRAY; Description Returns an array of face ID numbers of faces that have been deleted from the current updatable TopoMap object. Parameters None. Usage Notes This function returns the face ID numbers of faces in the current updatable TopoMap object that have been deleted since the object was most recently loaded (using SDO_ TOPO_MAP.LOAD_TOPO_MAP), updated (using SDO_TOPO_MAP.UPDATE_ TOPO_MAP), cleared (using SDO_TOPO_MAP.CLEAR_TOPO_MAP), committed (using SDO_TOPO_MAP.COMMIT_TOPO_MAP), or rolled back (using SDO_TOPO_ MAP.ROLLBACK_TOPO_MAP). If there have been no deletions during that time, the function returns an empty SDO_NUMBER_ARRAY object. This function is equivalent to using the getFaceDeletions method of the TopoMap class of the client-side Java API (described in Section 1.8.2). Examples The following example returns the face ID numbers of faces that have been deleted from the current updatable TopoMap object. In this case, the return of an empty SDO_ NUMBER_ARRAY object indicates that no faces have been deleted. SELECT SDO_TOPO_MAP.GET_FACE_DELETIONS FROM DUAL; GET_FACE_DELETIONS -------------------------------------------------------------------------------SDO_NUMBER_ARRAY() SDO_TOPO_MAP Package Subprograms 4-39 SDO_TOPO_MAP.GET_NEAREST_EDGE SDO_TOPO_MAP.GET_NEAREST_EDGE Format SDO_TOPO_MAP.GET_NEAREST_EDGE( topology IN VARCHAR2, topo_map IN VARCHAR2, point IN SDO_GEOMETRY ) RETURN NUMBER; or SDO_TOPO_MAP.GET_NEAREST_EDGE( topology IN VARCHAR2, topo_map IN VARCHAR2, x IN NUMBER, y IN NUMBER ) RETURN NUMBER; Description Returns the edge ID number of the edge that is nearest (closest to) the specified point. Parameters topology Name of the topology that contains the edge and the point, or a null value, as explained in Section 2.1.3. Must not exceed 20 characters. topo_map Name of the TopoMap object, or a null value, as explained in Section 2.1.3. (TopoMap objects are explained in Section 2.1.1.) point Geometry object specifying the point. x X-axis value of the point. y Y-axis value of the point. Usage Notes The topology or topo_map parameter should specify a valid name, as explained in Section 2.1.3. The nearest edge is determined from the representation of the topology in the database, using the spatial index. If there are changed, added, or deleted edges in the instance and the database has not been updated to reflect those changes, the result may not reflect the true situation in the TopoMap object cache. 4-40 Oracle Spatial Topology and Network Data Models SDO_TOPO_MAP.GET_NEAREST_EDGE If multiple edges are equally close to the point, any one of the edge ID values is returned. If no edges exist in the topology, this function returns 0 (zero). This function is equivalent to using the getNearestEdge method of the TopoMap class of the client-side Java API (described in Section 1.8.2). Examples The following example returns the edge ID number of the edge that is closest to the point at (8, 8) in the CITY_DATA_TOPOMAP TopoMap object. (The example refers to definitions and data from Section 1.12.1.) SELECT SDO_TOPO_MAP.GET_NEAREST_EDGE(null, 'CITY_DATA_TOPOMAP', SDO_GEOMETRY(2001, NULL, SDO_POINT_TYPE(8,8,NULL), NULL, NULL)) FROM DUAL; SDO_TOPO_MAP.GET_NEAREST_EDGE(NULL,'CITY_DATA_TOPOMAP',SDO_GEOMETRY(2001,NULL,SD -------------------------------------------------------------------------------22 SDO_TOPO_MAP Package Subprograms 4-41 SDO_TOPO_MAP.GET_NEAREST_EDGE_IN_CACHE SDO_TOPO_MAP.GET_NEAREST_EDGE_IN_CACHE Format SDO_TOPO_MAP.GET_NEAREST_EDGE_IN_CACHE( topo_map IN VARCHAR2, point IN SDO_GEOMETRY ) RETURN NUMBER; or SDO_TOPO_MAP.GET_NEAREST_EDGE_IN_CACHE( topo_map IN VARCHAR2, x IN NUMBER, y IN NUMBER ) RETURN NUMBER; Description Returns the edge ID number of the edge that, of the edges loaded in the specified TopoMap object, is nearest (closest to) the specified point. Parameters topo_map Name of the TopoMap object. (TopoMap objects are explained in Section 2.1.1.) point Geometry object specifying the point. x X-axis value of the point. y Y-axis value of the point. Usage Notes If multiple edges are equally close to the point, any one of the edge ID values is returned. If no topology data is loaded or if no edges exist in the cache, this function returns 0 (zero). This function is equivalent to using the getNearestEdgeInCache method of the TopoMap class of the client-side Java API (described in Section 1.8.2). Examples The following example returns the edge ID number of the edge that is closest to the point at (8, 8) in the CITY_DATA_TOPOMAP TopoMap object. (The example refers to definitions and data from Section 1.12.1.) SELECT SDO_TOPO_MAP.GET_NEAREST_EDGE_IN_CACHE('CITY_DATA_TOPOMAP', SDO_GEOMETRY(2001, NULL, SDO_POINT_TYPE(8,8,NULL), NULL, NULL)) FROM DUAL; 4-42 Oracle Spatial Topology and Network Data Models SDO_TOPO_MAP.GET_NEAREST_EDGE_IN_CACHE SDO_TOPO_MAP.GET_NEAREST_EDGE_IN_CACHE('CITY_DATA_TOPOMAP',SDO_GEOMETRY(2001,NUL -------------------------------------------------------------------------------22 SDO_TOPO_MAP Package Subprograms 4-43 SDO_TOPO_MAP.GET_NEAREST_NODE SDO_TOPO_MAP.GET_NEAREST_NODE Format SDO_TOPO_MAP.GET_NEAREST_NODE( topology IN VARCHAR2, topo_map IN VARCHAR2, point IN SDO_GEOMETRY ) RETURN NUMBER; or SDO_TOPO_MAP.GET_NEAREST_NODE( topology IN VARCHAR2, topo_map IN VARCHAR2, x IN NUMBER, y IN NUMBER ) RETURN NUMBER; Description Returns the node ID number of the node that is nearest (closest to) the specified point. Parameters topology Name of the topology that contains the node and the point, or a null value, as explained in Section 2.1.3. Must not exceed 20 characters. topo_map Name of the TopoMap object, or a null value, as explained in Section 2.1.3. (TopoMap objects are explained in Section 2.1.1.) point Geometry object specifying the point. x X-axis value of the point. y Y-axis value of the point. Usage Notes The topology or topo_map parameter should specify a valid name, as explained in Section 2.1.3. The nearest node is determined from the representation of the topology in the database, using the spatial index. If there are changed, added, or deleted nodes in the instance and the database has not been updated to reflect those changes, the result may not reflect the true situation in the TopoMap object cache. 4-44 Oracle Spatial Topology and Network Data Models SDO_TOPO_MAP.GET_NEAREST_NODE If multiple nodes are equally close to the point, any one of the node ID values is returned. This function is equivalent to using the getNearestNode method of the TopoMap class of the client-side Java API (described in Section 1.8.2). Examples The following example returns the node ID number of the node that is closest to the point at (8, 8) in the CITY_DATA_TOPOMAP TopoMap object. (The example refers to definitions and data from Section 1.12.1.) SELECT SDO_TOPO_MAP.GET_NEAREST_NODE(null, 'CITY_DATA_TOPOMAP', SDO_GEOMETRY(2001, NULL, SDO_POINT_TYPE(8,8,NULL), NULL, NULL)) FROM DUAL; SDO_TOPO_MAP.GET_NEAREST_NODE(NULL,'CITY_DATA_TOPOMAP',SDO_GEOMETRY(2001,NULL,SD -------------------------------------------------------------------------------8 SDO_TOPO_MAP Package Subprograms 4-45 SDO_TOPO_MAP.GET_NEAREST_NODE_IN_CACHE SDO_TOPO_MAP.GET_NEAREST_NODE_IN_CACHE Format SDO_TOPO_MAP.GET_NEAREST_NODE_IN_CACHE( topo_map IN VARCHAR2, point IN SDO_GEOMETRY ) RETURN NUMBER; or SDO_TOPO_MAP.GET_NEAREST_NODE_IN_CACHE( topo_map IN VARCHAR2, x IN NUMBER, y IN NUMBER ) RETURN NUMBER; Description Returns the node ID number of the node that, of the nodes loaded in the specified TopoMap object, is nearest (closest to) the specified point. Parameters topo_map Name of the TopoMap object. (TopoMap objects are explained in Section 2.1.1.) point Geometry object specifying the point. x X-axis value of the point. y Y-axis value of the point. Usage Notes If multiple nodes are equally close to the point, any one of the node ID values is returned. If no topology data is loaded or if no nodes exist in the cache, this function returns 0 (zero). This function is equivalent to using the getNearestNodeInCache method of the TopoMap class of the client-side Java API (described in Section 1.8.2). Examples The following example returns the node ID number of the node that is closest to the point at (8, 8) in the CITY_DATA_TOPOMAP TopoMap object. (The example refers to definitions and data from Section 1.12.1.) SELECT SDO_TOPO_MAP.GET_NEAREST_NODE_IN_CACHE('CITY_DATA_TOPOMAP', SDO_GEOMETRY(2001, NULL, SDO_POINT_TYPE(8,8,NULL), NULL, NULL)) FROM DUAL; 4-46 Oracle Spatial Topology and Network Data Models SDO_TOPO_MAP.GET_NEAREST_NODE_IN_CACHE SDO_TOPO_MAP.GET_NEAREST_NODE_IN_CACHE('CITY_DATA_TOPOMAP',SDO_GEOMETRY(2001,NUL -------------------------------------------------------------------------------8 SDO_TOPO_MAP Package Subprograms 4-47 SDO_TOPO_MAP.GET_NODE_ADDITIONS SDO_TOPO_MAP.GET_NODE_ADDITIONS Format SDO_TOPO_MAP.GET_NODE_ADDITIONS() RETURN SDO_NUMBER_ARRAY; Description Returns an array of node ID numbers of nodes that have been added to the current updatable TopoMap object. Parameters None. Usage Notes This function returns the node ID numbers of nodes in the current updatable TopoMap object that have been added since the object was most recently loaded (using SDO_ TOPO_MAP.LOAD_TOPO_MAP), updated (using SDO_TOPO_MAP.UPDATE_ TOPO_MAP), cleared (using SDO_TOPO_MAP.CLEAR_TOPO_MAP), committed (using SDO_TOPO_MAP.COMMIT_TOPO_MAP), or rolled back (using SDO_TOPO_ MAP.ROLLBACK_TOPO_MAP). If there have been no additions during that time, the function returns an empty SDO_NUMBER_ARRAY object. This function is equivalent to using the getNodeAdditions method of the TopoMap class of the client-side Java API (described in Section 1.8.2). Examples The following example returns the node ID numbers of nodes that have been added to the current updatable TopoMap object. SELECT SDO_TOPO_MAP.GET_NODE_ADDITIONS FROM DUAL; GET_NODE_ADDITIONS -------------------------------------------------------------------------------SDO_NUMBER_ARRAY(24, 25, 26, 27, 28) 4-48 Oracle Spatial Topology and Network Data Models SDO_TOPO_MAP.GET_NODE_CHANGES SDO_TOPO_MAP.GET_NODE_CHANGES Format SDO_TOPO_MAP.GET_NODE_CHANGES() RETURN SDO_NUMBER_ARRAY; Description Returns an array of node ID numbers of nodes that have been changed (modified) in the current updatable TopoMap object. Parameters None. Usage Notes This function returns the node ID numbers of nodes in the current updatable TopoMap object that have been changed since the object was most recently loaded (using SDO_ TOPO_MAP.LOAD_TOPO_MAP), updated (using SDO_TOPO_MAP.UPDATE_ TOPO_MAP), cleared (using SDO_TOPO_MAP.CLEAR_TOPO_MAP), committed (using SDO_TOPO_MAP.COMMIT_TOPO_MAP), or rolled back (using SDO_TOPO_ MAP.ROLLBACK_TOPO_MAP). If there have been no changes during that time, the function returns an empty SDO_NUMBER_ARRAY object. This function is equivalent to using the getNodeChanges method of the TopoMap class of the client-side Java API (described in Section 1.8.2). Examples The following example returns the node ID numbers of nodes that have been changed in the current updatable TopoMap object. SELECT SDO_TOPO_MAP.GET_NODE_CHANGES FROM DUAL; GET_NODE_CHANGES -------------------------------------------------------------------------------SDO_NUMBER_ARRAY(2, 4) SDO_TOPO_MAP Package Subprograms 4-49 SDO_TOPO_MAP.GET_NODE_COORD SDO_TOPO_MAP.GET_NODE_COORD Format SDO_TOPO_MAP.GET_NODE_COORD( topology IN VARCHAR2, topo_map IN VARCHAR2, node_id IN NUMBER ) RETURN SDO_GEOMETRY; Description Returns an SDO_GEOMETRY object with the coordinates of the specified node. Parameters topology Name of the topology that contains the node, or a null value, as explained in Section 2.1.3. Must not exceed 20 characters. topo_map Name of the TopoMap object, or a null value, as explained in Section 2.1.3. (TopoMap objects are explained in Section 2.1.1.) node_id Node ID value of the node. Usage Notes The topology or topo_map parameter should specify a valid name, as explained in Section 2.1.3. This function is equivalent to using the getNodeCoord method of the TopoMap class of the client-side Java API (described in Section 1.8.2). Examples The following example returns a geometry object with the coordinates of the node whose node ID value is 14. (The example refers to definitions and data from Section 1.12.1.) SELECT SDO_TOPO_MAP.GET_NODE_COORD(null, 'CITY_DATA_TOPOMAP', 14) FROM DUAL; SDO_TOPO_MAP.GET_NODE_COORD(NULL,'CITY_DATA_TOPOMAP',14)(SDO_GTYPE, SDO_SRID, SD -------------------------------------------------------------------------------SDO_GEOMETRY(2001, 0, SDO_POINT_TYPE(21, 14, NULL), NULL, NULL) 4-50 Oracle Spatial Topology and Network Data Models SDO_TOPO_MAP.GET_NODE_DELETIONS SDO_TOPO_MAP.GET_NODE_DELETIONS Format SDO_TOPO_MAP.GET_NODE_DELETIONS() RETURN SDO_NUMBER_ARRAY; Description Returns an array of node ID numbers of nodes that have been deleted from the current updatable TopoMap object. Parameters None. Usage Notes This function returns the node ID numbers of nodes in the current updatable TopoMap object that have been deleted since the object was most recently loaded (using SDO_ TOPO_MAP.LOAD_TOPO_MAP), updated (using SDO_TOPO_MAP.UPDATE_ TOPO_MAP), cleared (using SDO_TOPO_MAP.CLEAR_TOPO_MAP), committed (using SDO_TOPO_MAP.COMMIT_TOPO_MAP), or rolled back (using SDO_TOPO_ MAP.ROLLBACK_TOPO_MAP). If there have been no deletions during that time, the function returns an empty SDO_NUMBER_ARRAY object. This function is equivalent to using the getNodeDeletions method of the TopoMap class of the client-side Java API (described in Section 1.8.2). Examples The following example returns the node ID numbers of nodes that have been deleted from the current updatable TopoMap object. In this case, the return of an empty SDO_ NUMBER_ARRAY object indicates that no nodes have been deleted. SELECT SDO_TOPO_MAP.GET_NODE_DELETIONS FROM DUAL; GET_NODE_DELETIONS -------------------------------------------------------------------------------SDO_NUMBER_ARRAY() SDO_TOPO_MAP Package Subprograms 4-51 SDO_TOPO_MAP.GET_NODE_FACE_STAR SDO_TOPO_MAP.GET_NODE_FACE_STAR Format SDO_TOPO_MAP.GET_NODE_FACE_STAR( topology IN VARCHAR2, topo_map IN VARCHAR2, node_id IN NUMBER ) RETURN SDO_NUMBER_ARRAY; Description Returns an SDO_NUMBER_ARRAY object with the face ID numbers, in clockwise order, of the faces that are connected to the specified node. Parameters topology Name of the topology that contains the node, or a null value, as explained in Section 2.1.3. Must not exceed 20 characters. topo_map Name of the TopoMap object, or a null value, as explained in Section 2.1.3. (TopoMap objects are explained in Section 2.1.1.) node_id Node ID value of the node. Usage Notes The node face star of a node is the faces that are connected to the node. One face is returned for each edge connected to the node. For an isolated node, the containing face is returned. A face may appear more than once in the list. The topology or topo_map parameter should specify a valid name, as explained in Section 2.1.3. This function is equivalent to using the getNodeFaceStar method of the TopoMap class of the client-side Java API (described in Section 1.8.2). To return the node star of a node, use the SDO_TOPO_MAP.GET_NODE_STAR function. Examples The following example returns the node face star of the node whose node ID value is 14. (The example refers to definitions and data from Section 1.12.1.) SELECT SDO_TOPO_MAP.GET_NODE_FACE_STAR(null, 'CITY_DATA_TOPOMAP', 14) FROM DUAL; SDO_TOPO_MAP.GET_NODE_FACE_STAR(NULL,'CITY_DATA_TOPOMAP',14) -------------------------------------------------------------------------------SDO_NUMBER_ARRAY(4, 7, 6, 3) 4-52 Oracle Spatial Topology and Network Data Models SDO_TOPO_MAP.GET_NODE_STAR SDO_TOPO_MAP.GET_NODE_STAR Format SDO_TOPO_MAP.GET_NODE_STAR( topology IN VARCHAR2, topo_map IN VARCHAR2, node_id IN NUMBER ) RETURN SDO_NUMBER_ARRAY; Description Returns an SDO_NUMBER_ARRAY object with the edge ID numbers, in clockwise order, of the edges that are connected to the specified node. Parameters topology Name of the topology that contains the node, or a null value, as explained in Section 2.1.3. Must not exceed 20 characters. topo_map Name of the TopoMap object, or a null value, as explained in Section 2.1.3. (TopoMap objects are explained in Section 2.1.1.) node_id Node ID value of the node. Usage Notes The node star of a node is the edges that are connected to the node. A positive edge ID represents an edge for which the node is its start node. A negative edge ID represents an edge for which the node is its end node. If any loops are connected to the node, edges may appear in the list twice with opposite signs. The topology or topo_map parameter should specify a valid name, as explained in Section 2.1.3. This function is equivalent to using the getNodeStar method of the TopoMap class of the client-side Java API (described in Section 1.8.2). To return the node face star of a node, use the SDO_TOPO_MAP.GET_NODE_FACE_ STAR function. Examples The following example returns the node star of the node whose node ID value is 14. (The example refers to definitions and data from Section 1.12.1.) SELECT SDO_TOPO_MAP.GET_NODE_STAR(null, 'CITY_DATA_TOPOMAP', 14) FROM DUAL; SDO_TOPO_MAP.GET_NODE_STAR(NULL,'CITY_DATA_TOPOMAP',14) -------------------------------------------------------------------------------SDO_NUMBER_ARRAY(19, -10, -20, -9) SDO_TOPO_MAP Package Subprograms 4-53 SDO_TOPO_MAP.GET_TOPO_NAME SDO_TOPO_MAP.GET_TOPO_NAME Format SDO_TOPO_MAP.GET_TOPO_NAME( topo_map IN VARCHAR2 ) RETURN VARCHAR2; Description Returns the name of the topology associated with the specified TopoMap object. Parameters topo_map Name of the TopoMap object. (TopoMap objects are explained in Section 2.1.1.) Usage Notes This function is equivalent to using the getTopoName method of the TopoMap class of the client-side Java API (described in Section 1.8.2). Examples The following example returns the name of the topology associated with the TopoMap object named CITY_DATA_TOPOMAP. (The example refers to definitions and data from Section 1.12.1.) SELECT SDO_TOPO_MAP.GET_TOPO_NAME('CITY_DATA_TOPOMAP') FROM DUAL; SDO_TOPO_MAP.GET_TOPO_NAME('CITY_DATA_TOPOMAP') -------------------------------------------------------------------------------CITY_DATA 4-54 Oracle Spatial Topology and Network Data Models SDO_TOPO_MAP.GET_TOPO_TRANSACTION_ID SDO_TOPO_MAP.GET_TOPO_TRANSACTION_ID Format SDO_TOPO_MAP.GET_TOPO_TRANSACTION_ID() RETURN NUMBER; Description Returns the topology transaction ID number, if data has been loaded into the current updatable TopoMap object. Parameters None. Usage Notes For each row in the history information table for a topology, the TOPO_TX_ID column contains the topology transaction ID number. The history information table is described in Section 1.5.5. This function is equivalent to using the getTopoTransactionId method of the TopoMap class of the client-side Java API (described in Section 1.8.2). Examples The following example returns the topology transaction ID number for the current updatable TopoMap object. SELECT SDO_TOPO_MAP.GET_TOPO_TRANSACTION_ID FROM DUAL; GET_TOPO_TRANSACTION_ID ----------------------1 SDO_TOPO_MAP Package Subprograms 4-55 SDO_TOPO_MAP.LIST_TOPO_MAPS SDO_TOPO_MAP.LIST_TOPO_MAPS Format SDO_TOPO_MAP.LIST_TOPO_MAPS() RETURN VARCHAR2; Description Returns a comma-delimited list of entries for each TopoMap object currently active in the session, or an empty string if there are no currently active TopoMap objects. Parameters None. Usage Notes Each entry in the comma-delimited list contains the following information: the name of the TopoMap object, the name of the topology associated with the TopoMap object, and either updatable if the TopoMap object can be updated (that is, edited) or read-only if the TopoMap object cannot be updated. For more information about TopoMap objects, including updatable and read-only status, see Section 2.1.1. To remove a TopoMap object from the session, use the SDO_TOPO_MAP.DROP_ TOPO_MAP procedure. Examples The following example lists the Topomap object name, topology name, and whether the object is updatable or read-only for each TopoMap object currently active in the session. (The example refers to definitions and data from Section 1.12.1.) SELECT SDO_TOPO_MAP.LIST_TOPO_MAPS FROM DUAL; LIST_TOPO_MAPS -------------------------------------------------------------------------------(CITY_DATA_TOPOMAP, CITY_DATA, updatable) 4-56 Oracle Spatial Topology and Network Data Models SDO_TOPO_MAP.LOAD_TOPO_MAP SDO_TOPO_MAP.LOAD_TOPO_MAP Format (Function) SDO_TOPO_MAP.LOAD_TOPO_MAP( topo_map IN VARCHAR2, allow_updates IN VARCHAR2, build_indexes IN VARCHAR2 DEFAULT 'TRUE' ) RETURN VARCHAR2; or SDO_TOPO_MAP.LOAD_TOPO_MAP( topo_map IN VARCHAR2, xmin IN NUMBER, ymin IN NUMBER, xmax IN NUMBER, ymax IN NUMBER, allow_updates IN VARCHAR2, build_indexes IN VARCHAR2 DEFAULT 'TRUE' ) RETURN VARCHAR2; Format (Procedure) SDO_TOPO_MAP.LOAD_TOPO_MAP( topo_map IN VARCHAR2, allow_updates IN VARCHAR2, build_indexes IN VARCHAR2 DEFAULT 'TRUE’);' or SDO_TOPO_MAP.LOAD_TOPO_MAP( topo_map IN VARCHAR2, xmin IN NUMBER, ymin IN NUMBER, xmax IN NUMBER, ymax IN NUMBER, allow_updates IN VARCHAR2); build_indexes IN VARCHAR2 DEFAULT 'TRUE’);' Description Loads the topological elements (primitives) for an entire topology or a window (rectangular portion) of a topology into a TopoMap object. If you use a function format, returns the string TRUE if topological elements were loaded into the cache, and FALSE if no topological elements were loaded into the cache. SDO_TOPO_MAP Package Subprograms 4-57 SDO_TOPO_MAP.LOAD_TOPO_MAP Parameters topo_map Name of the TopoMap object. (TopoMap objects are explained in Section 2.1.1.) xmin Lower-left X coordinate value for the window (rectangular portion of the topology) to be loaded. See the Usage Notes and Figure 4–1 for information about which topological elements are loaded when you specify a window. ymin Lower-left Y coordinate value for the window (rectangular portion of the topology) to be loaded. xmax Upper-right X coordinate value for the window (rectangular portion of the topology) to be loaded. ymax Upper-right Y coordinate value for the window (rectangular portion of the topology) to be loaded. allow_updates TRUE makes the TopoMap object updatable; that is, it allows topology editing operations to be performed on the TopoMap object. FALSE makes the TopoMap object read-only; that is, it does not allow topology editing operations to be performed on the TopoMap object. Making a TopoMap object updatable causes the topological elements in the TopoMap object to be locked, which means that they cannot be included in an updatable TopoMap object in the session of another database user. (Within any given user session, there can be no more than one updatable TopoMap object active.) build_indexes TRUE (the default) builds in-memory R-tree indexes for edge and face data; FALSE does not build in-memory R-tree indexes for edge and face data. The indexes improve the performance of editing operations, especially with large topologies. Usage Notes Using a procedure format for loading the TopoMap object is more efficient than using the function format, if you do not need to know if any topological elements were loaded (for example, if the specified topology or rectangular area is empty). Using a function format lets you know if any topological elements were loaded. You must create the TopoMap object (using the SDO_TOPO_MAP.CREATE_TOPO_ MAP procedure) before you load data into it. You cannot use this function or procedure if the TopoMap object already contains data. If the TopoMap object contains any data, you must do one of the following before calling this function or procedure: commit the changes (using the SDO_TOPO_ MAP.COMMIT_TOPO_MAP procedure) and clear the cache (using the SDO_TOPO_ MAP.CLEAR_TOPO_MAP procedure), or roll back the changes (using the SDO_ TOPO_MAP.ROLLBACK_TOPO_MAP procedure). For information about using an in-memory cache to edit topological elements, see Section 2.1. 4-58 Oracle Spatial Topology and Network Data Models SDO_TOPO_MAP.LOAD_TOPO_MAP This function or procedure is equivalent to using the loadTopology or loadWindow method of the TopoMap class of the client-side Java API (described in Section 1.8.2). Every TopoMap object, whether for an entire topology or for a window specified using the xmin, ymin, xmax, and ymax parameters, has a region associated with it. For an updatable TopoMap object, updates are allowed only within this region. (The region might also contain topological elements that you cannot update directly, but that might be modified by Oracle Spatial as needed as a result of your editing operations.) When a TopoMap object is loaded, all nodes, faces, and edges that intersect the region for the TopoMap object are loaded. When a face is loaded, all edges and nodes that are on the boundary of the face are loaded. When an edge is loaded, the start node and end node of the edge are loaded. Consider the topology and the window (shown by a dashed line) in Figure 4–1. Figure 4–1 Loading Topological Elements into a Window N13 N18 E14 E15 N15 E11 N17 E12 N16 N12 E13 F1 N14 N7 N20 N8 N10 E7 E9 E16 E8 N11 E10 N9 E6 N19 E5 N6 N5 E4 N4 E3 E2 E1 N1 N2 N3 With the window shown in Figure 4–1: ■ ■ Face F1 is loaded because it partially overlaps the window. The following edges are loaded: E3, E4, E5, E6, E7, E8, E9, E10, E11, E12, E13, E14, E16. Edge E3 is loaded because it partially overlaps the window. Edge E9 is loaded because it bounds a face (F1) that partially overlaps a window. Edge E12 is loaded because it is an island edge in a face (F1) that partially overlaps the window. Edge E1 is not loaded because it is not associated with any face that interacts with the window. ■ The following nodes are loaded: N2, N5, N6, N7, N8, N9, N10, N11, N12, N16, N19, N20. Non-isolated node N2 is loaded because edge E3 is loaded. SDO_TOPO_MAP Package Subprograms 4-59 SDO_TOPO_MAP.LOAD_TOPO_MAP Non-isolated node N12 is loaded because edges E9 and E11 are loaded. Isolated node N16 is loaded because it is an isolated (island) node inside a locked face. Examples The following example loads all CITY_DATA topology elements into its associated TopoMap object for editing (not read-only) and builds the in-memory R-tree indexes by default. It returns a result indicating that the operation was successful and that some topological elements were loaded into the cache. (The example refers to definitions and data from Section 1.12.1.) CALL SDO_TOPO_MAP.LOAD_TOPO_MAP('CITY_DATA_TOPOMAP', 'TRUE') INTO :res_varchar; Call completed. PRINT res_varchar; RES_VARCHAR -------------------------------------------------------------------------------TRUE 4-60 Oracle Spatial Topology and Network Data Models SDO_TOPO_MAP.MOVE_EDGE SDO_TOPO_MAP.MOVE_EDGE Format SDO_TOPO_MAP.MOVE_EDGE( topology IN VARCHAR2, edge_id IN NUMBER, s_node_id IN NUMBER, t_node_id IN NUMBER, edge_coords IN SDO_NUMBER_ARRAY); or SDO_TOPO_MAP.MOVE_EDGE( topology IN VARCHAR2, edge_id IN NUMBER, s_node_id IN NUMBER, t_node_id IN NUMBER, edge_coords IN SDO_NUMBER_ARRAY, moved_iso_nodes OUT SDO_NUMBER_ARRAY, moved_iso_edges OUT SDO_NUMBER_ARRAY, allow_iso_moves IN VARCHAR2); Description Moves a non-isolated edge. Parameters topology Name of the topology in which to move the edge, or null if you are using an updatable TopoMap object (see Section 2.1.2). Must not exceed 20 characters. edge_id Edge ID of the edge to be moved. edge_coords An array of coordinates of the resulting moved edge, from start point to end point. s_node_id Node ID of the source node, which identifies the point (start node or end node of the edge) affected by the move, before the move occurs. For example, if the end point of edge E19 is to be moved from node N17 to node N16, the s_node_id value is the node ID number for node N17. t_node_id Node ID of the target node, which identifies the point affected by the move, after the move occurs. For example, if the end point of edge E19 is to be moved from node N17 to node N16, the t_node_id value is the node ID number for node N16. SDO_TOPO_MAP Package Subprograms 4-61 SDO_TOPO_MAP.MOVE_EDGE moved_iso_nodes Output parameter in which, if the allow_iso_moves parameter value is TRUE, Spatial stores the node ID values of any isolated nodes that have moved to a different face as a result of this procedure. If the allow_iso_moves parameter value is FALSE, Spatial stores the node ID values of any isolated nodes that did not move but that would have moved to a different face if the allow_iso_moves parameter value had been TRUE. moved_iso_edges Output parameter in which, if the allow_iso_moves parameter value is TRUE, Spatial stores the edge ID values of any isolated edges that have moved to a different face as a result of this procedure. If the allow_iso_moves parameter value is FALSE, Spatial stores the edge ID values of any isolated edges that did not move but that would have moved to a different face if the allow_iso_moves parameter value had been TRUE. allow_iso_moves TRUE causes Spatial to allow an edge move operation that would cause any isolated nodes or edges to be in a different face, and to adjust the containing face information for such isolated nodes and edges; FALSE causes Spatial not to allow an edge move operation that would cause any isolated nodes or edges to be in a different face. If you use the format that does not include the allow_iso_moves parameter, Spatial allows an edge move operation that would cause any isolated nodes or edges to be in a different face, and it adjusts the containing face information for such isolated nodes and edges. Usage Notes For information about moving edges, see Section 2.3.2. This procedure is equivalent to using the moveEdge method of the TopoMap class of the client-side Java API (described in Section 1.8.2). Examples The following example moves the edge with edge ID value 19, and it displays the edge coordinates before and after the move. The edge move operation moves the end point of the edge from the node with node ID value 17 to the node with node ID value 16. (The edge being moved is E19 in Figure 1–2 in Section 1.2; and the edge is being changed from going vertically up to node N17, to going diagonally up and left to node N16. The example refers to definitions and data from Section 1.12.1.) -- Get coordinates of edge E19. SELECT SDO_TOPO_MAP.GET_EDGE_COORDS(null, 'CITY_DATA_TOPOMAP', 19) FROM DUAL; SDO_TOPO_MAP.GET_EDGE_COORDS(NULL,'CITY_DATA_TOPOMAP',19) -------------------------------------------------------------------------------SDO_NUMBER_ARRAY(21, 14, 21, 22) -- Move edge E19: from N14 -> N17 to N14 -> N16. The 3rd and 4th parameters -- identify N17 and N16. CALL SDO_TOPO_MAP.MOVE_EDGE(null, 19, 17, 16, SDO_NUMBER_ARRAY(21,14, 9,22)); Call completed. -- Get coordinates of edge E19 after the move. SELECT SDO_TOPO_MAP.GET_EDGE_COORDS(null, 'CITY_DATA_TOPOMAP', 19) FROM DUAL; 4-62 Oracle Spatial Topology and Network Data Models SDO_TOPO_MAP.MOVE_EDGE SDO_TOPO_MAP.GET_EDGE_COORDS(NULL,'CITY_DATA_TOPOMAP',19) -------------------------------------------------------------------------------SDO_NUMBER_ARRAY(21, 14, 9, 22) SDO_TOPO_MAP Package Subprograms 4-63 SDO_TOPO_MAP.MOVE_ISOLATED_NODE SDO_TOPO_MAP.MOVE_ISOLATED_NODE Format SDO_TOPO_MAP.MOVE_ISOLATED_NODE( topology IN VARCHAR2, node_id IN NUMBER, point IN SDO_GEOMETRY); or SDO_TOPO_MAP.MOVE_ISOLATED_NODE( topology IN VARCHAR2, node_id IN NUMBER, x IN NUMBER, y IN NUMBER); Description Moves an isolated (island) node. Parameters topology Name of the topology in which to move the node, or null if you are using an updatable TopoMap object (see Section 2.1.2). Must not exceed 20 characters. node_id Node ID of the node to be moved. point SDO_GEOMETRY object (point geometry) representing the location to which the isolated node is to be moved. x X-axis value of the point representing the location to which the isolated node is to be moved. y Y-axis value of the point representing the location to which the isolated node is to be moved. Usage Notes For information about moving nodes, see Section 2.2.2. The node must be moved to a location inside the face in which it is currently located. Otherwise, you must delete the node and re-create it. This procedure is equivalent to using the moveIsolatedNode method of the TopoMap class of the client-side Java API (described in Section 1.8.2). 4-64 Oracle Spatial Topology and Network Data Models SDO_TOPO_MAP.MOVE_ISOLATED_NODE Examples The following example adds an isolated node and then moves it. (The example refers to definitions and data from Section 1.12.1.) CALL SDO_TOPO_MAP.ADD_ISOLATED_NODE(null, 2, SDO_GEOMETRY(2001, NULL, SDO_POINT_TYPE(22,38,NULL), NULL, NULL)) INTO :res_number; -- Move the just-added isolated node (from 20,38 to 22,39). CALL SDO_TOPO_MAP.MOVE_ISOLATED_NODE( null, :res_number, SDO_GEOMETRY(2001, NULL, SDO_POINT_TYPE(22,39,NULL), NULL, NULL)); SDO_TOPO_MAP Package Subprograms 4-65 SDO_TOPO_MAP.MOVE_NODE SDO_TOPO_MAP.MOVE_NODE Format SDO_TOPO_MAP.MOVE_NODE( topology IN VARCHAR2, node_id IN NUMBER, edges_coords IN SDO_EDGE_ARRAY); or SDO_TOPO_MAP.MOVE_NODE( topology IN VARCHAR2, node_id IN NUMBER, edges_coords IN SDO_EDGE_ARRAY, moved_iso_nodes OUT SDO_NUMBER_ARRAY, moved_iso_edges OUT SDO_NUMBER_ARRAY, allow_iso_moves IN VARCHAR2); Description Moves a non-isolated node and its attached edges. Parameters topology Name of the topology in which to move the node, or null if you are using an updatable TopoMap object (see Section 2.1.2). Must not exceed 20 characters. node_id Node ID of the node to be moved. edges_coords An array of arrays, of type SDO_EDGE_ARRAY (described in Section 1.6.7). Each inner array consists of coordinates of each resulting attached edge, from start point to end point. The outer array consists of the attached edge arrays, starting with the start edge of the node to be moved and proceeding in clockwise order (with the sequence of the edges as would be obtained in a call to the SDO_TOPO_MAP.GET_NODE_STAR function). The array for each edge must include the start and end points. Any loops that connect twice at the moved node must be specified twice in the array. moved_iso_nodes Output parameter in which, if the allow_iso_moves parameter value is TRUE, Spatial stores the node ID values of any isolated nodes that have moved to a different face as a result of this procedure. If the allow_iso_moves parameter value is FALSE, Spatial stores the node ID values of any isolated nodes that did not move but that would have moved to a different face if the allow_iso_moves parameter value had been TRUE. 4-66 Oracle Spatial Topology and Network Data Models SDO_TOPO_MAP.MOVE_NODE moved_iso_edges Output parameter in which, if the allow_iso_moves parameter value is TRUE, Spatial stores the edge ID values of any isolated edges that have moved to a different face as a result of this procedure. If the allow_iso_moves parameter value is FALSE, Spatial stores the edge ID values of any isolated edges that did not move but that would have moved to a different face if the allow_iso_moves parameter value had been TRUE. allow_iso_moves TRUE causes Spatial to allow a node move operation that would cause any isolated nodes or edges to be in a different face, and to adjust the containing face information for such isolated nodes and edges; FALSE causes Spatial not to allow a node move operation that would cause any isolated nodes or edges to be in a different face. If you use the format that does not include the allow_iso_moves parameter, Spatial allows a node move operation that would cause any isolated nodes or edges to be in a different face, and it adjusts the containing face information for such isolated nodes and edges. Usage Notes For information about moving nodes, see Section 2.2.2. This procedure is equivalent to using the moveNode method of the TopoMap class of the client-side Java API (described in Section 1.8.2). Examples The following example moves node N3 and adjusts the coordinates of the only attached edge. (The example refers to definitions and data from Section 1.12.1.) -- Move node N3 to right: from 25,35 to 26,35. -- E3 is changed from 25,30 -> 25,35 to 25,30 -> 26,35. CALL SDO_TOPO_MAP.MOVE_NODE(null, 3, SDO_EDGE_ARRAY(SDO_NUMBER_ARRAY(25,30, 26,35))); SDO_TOPO_MAP Package Subprograms 4-67 SDO_TOPO_MAP.REMOVE_EDGE SDO_TOPO_MAP.REMOVE_EDGE Format SDO_TOPO_MAP.REMOVE_EDGE( topology IN VARCHAR2, edge_id IN NUMBER); Description Removes an edge from a topology. Parameters topology Name of the topology from which to remove the edge, or null if you are using an updatable TopoMap object (see Section 2.1.2). Must not exceed 20 characters. edge_id Edge ID of the edge to be removed. Usage Notes If topology is not null, Spatial automatically updates the appropriate entries in the _EDGE$ and _FACE$ tables. (If topology is null, you can update these tables at any time by calling the SDO_TOPO_MAP.UPDATE_ TOPO_MAP procedure.) For information about removing an edge from a topology, see Section 2.3.3. Examples The following example removes the edge with edge ID value 99 from the current updatable TopoMap object. CALL SDO_TOPO_MAP.REMOVE_EDGE(null, 99); 4-68 Oracle Spatial Topology and Network Data Models SDO_TOPO_MAP.REMOVE_NODE SDO_TOPO_MAP.REMOVE_NODE Format SDO_TOPO_MAP.REMOVE_NODE( topology IN VARCHAR2, node_id IN NUMBER); Description Removes a node from a topology. Parameters topology Name of the topology from which to remove the node, or null if you are using an updatable TopoMap object (see Section 2.1.2). Must not exceed 20 characters. node_id Node ID of the node to be removed. Usage Notes If topology is not null, Spatial automatically updates the appropriate entries in the _NODE$ and _EDGE$ tables, and in the _FACE$ table if necessary. (If topology is null, you can update these tables at any time by calling the SDO_TOPO_MAP.UPDATE_TOPO_MAP procedure.) For information about removing a node from a topology, see Section 2.2.3. Examples The following example removes the node with node ID value 500 from the current updatable TopoMap object. CALL SDO_TOPO_MAP.REMOVE_NODE(null, 500); SDO_TOPO_MAP Package Subprograms 4-69 SDO_TOPO_MAP.REMOVE_OBSOLETE_NODES SDO_TOPO_MAP.REMOVE_OBSOLETE_NODES Format SDO_TOPO_MAP.REMOVE_OBSOLETE_NODES( topology IN VARCHAR2); Description Removes obsolete nodes from a topology. (Obsolete nodes are explained in Section 2.2.4.) Parameters topology Name of the topology from which to remove obsolete nodes, or null if you are using an updatable TopoMap object (see Section 2.1.2). Must not exceed 20 characters. Usage Notes For information about removing obsolete nodes from a topology, see Section 2.2.4. Examples The following example removes all obsolete nodes from the current updatable TopoMap object. CALL SDO_TOPO_MAP.REMOVE_OBSOLETE_NODES(null); 4-70 Oracle Spatial Topology and Network Data Models SDO_TOPO_MAP.ROLLBACK_TOPO_MAP SDO_TOPO_MAP.ROLLBACK_TOPO_MAP Format SDO_TOPO_MAP.ROLLBACK_TOPO_MAP; Description Rolls back all changes to the database that were made using the current updatable TopoMap object, discards any changes in the object, clears the object’s cache structure, and makes the object read-only. Parameters None. Usage Notes Use this procedure when you are finished with a batch of edits to a topology and you want to discard (that is, not commit) all changes to the database and in the cache. After the rollback operation completes, you cannot edit the TopoMap object. To make further edits to the topology, you can load the topology into the same TopoMap object for update (using the SDO_TOPO_MAP.LOAD_TOPO_MAP function or procedure), or you can create a new TopoMap object (using the SDO_TOPO_MAP.CREATE_TOPO_ MAP procedure) and load the topology into that TopoMap object for update. To commit all TopoMap object changes, use the SDO_TOPO_MAP.COMMIT_TOPO_ MAP procedure. For information about using an in-memory cache to edit topological elements, see Section 2.1. This procedure is equivalent to using the rollbackDB method of the TopoMap class of the client-side Java API (described in Section 1.8.2). Examples The following example rolls back from the database all changes associated with the current updatable TopoMap object. EXECUTE SDO_TOPO_MAP.ROLLBACK_TOPO_MAP; SDO_TOPO_MAP Package Subprograms 4-71 SDO_TOPO_MAP.SEARCH_EDGE_RTREE_TOPO_MAP SDO_TOPO_MAP.SEARCH_EDGE_RTREE_TOPO_MAP Format SDO_TOPO_MAP.SEARCH_EDGE_RTREE_TOPO_MAP( topo_map IN VARCHAR2, xmin IN NUMBER, ymin IN NUMBER, xmax IN NUMBER, ymax IN NUMBER, capacity IN NUMBER ) RETURN SDO_NUMBER_ARRAY; Description Returns an array with the edge ID numbers of the edges that interact with a specified query window. The query uses the edge R-tree built on the specified TopoMap object. Parameters topo_map Name of the TopoMap object. (TopoMap objects are explained in Section 2.1.1.) xmin Lower-left X coordinate value for the query window. ymin Lower-left Y coordinate value for the query window. xmax Upper-right X coordinate value for the query window. ymax Upper-right Y coordinate value for the query window. capacity Maximum number of edge ID values to be returned. If you specify 0 or a negative number, 100 is used. Usage Notes This procedure is equivalent to using the searchEdgeRTree method of the TopoMap class of the client-side Java API (described in Section 1.8.2). Examples The following example returns the edge ID numbers (up to 200) of edge that interact with a query window whose lower-left corner is at (5,5) and upper-right corner is at (30,40). (The example refers to definitions and data from Section 1.12.1.) SELECT SDO_TOPO_MAP.SEARCH_EDGE_RTREE_TOPO_MAP('CITY_DATA_TOPOMAP', 5,5, 30,40, 200) FROM DUAL; 4-72 Oracle Spatial Topology and Network Data Models SDO_TOPO_MAP.SEARCH_EDGE_RTREE_TOPO_MAP SDO_TOPO_MAP.SEARCH_EDGE_RTREE_TOPO_MAP('CITY_DATA_TOPOMAP',5,5,30,40,200) -------------------------------------------------------------------------------SDO_NUMBER_ARRAY(12, 13, 22, 20, 9, 21, 19, 6, 10, 7, 26, 3, 1, 25, 2) SDO_TOPO_MAP Package Subprograms 4-73 SDO_TOPO_MAP.SEARCH_FACE_RTREE_TOPO_MAP SDO_TOPO_MAP.SEARCH_FACE_RTREE_TOPO_MAP Format SDO_TOPO_MAP.SEARCH_FACE_RTREE_TOPO_MAP( topo_map IN VARCHAR2, xmin IN NUMBER, ymin IN NUMBER, xmax IN NUMBER, ymax IN NUMBER, capacity IN NUMBER ) RETURN SDO_NUMBER_ARRAY; Description Returns an array with the face ID numbers of the faces that interact with a specified query window. The query uses the face R-tree built on the specified TopoMap object. Parameters topo_map Name of the TopoMap object. (TopoMap objects are explained in Section 2.1.1.) xmin Lower-left X coordinate value for the query window. ymin Lower-left Y coordinate value for the query window. xmax Upper-right X coordinate value for the query window. ymax Upper-right Y coordinate value for the query window. capacity Maximum number of face ID values to be returned. If you specify 0 or a negative number, 100 is used. Usage Notes This procedure is equivalent to using the searchFaceRTree method of the TopoMap class of the client-side Java API (described in Section 1.8.2). Examples The following example returns the face ID numbers (up to 200) of faces that interact with a query window whose lower-left corner is at (5,5) and upper-right corner is at (30,40). (The example refers to definitions and data from Section 1.12.1.) SELECT SDO_TOPO_MAP.SEARCH_FACE_RTREE_TOPO_MAP('CITY_DATA_TOPOMAP', 5,5, 30,40, 200) FROM DUAL; 4-74 Oracle Spatial Topology and Network Data Models SDO_TOPO_MAP.SEARCH_FACE_RTREE_TOPO_MAP SDO_TOPO_MAP.SEARCH_FACE_RTREE_TOPO_MAP('CITY_DATA_TOPOMAP',5,5,30,40,200) -------------------------------------------------------------------------------SDO_NUMBER_ARRAY(6, 7, 3, 4, 9, 1, 2) SDO_TOPO_MAP Package Subprograms 4-75 SDO_TOPO_MAP.SET_MAX_MEMORY_SIZE SDO_TOPO_MAP.SET_MAX_MEMORY_SIZE Format SDO_TOPO_MAP.SET_MAX_MEMORY_SIZE( maxsize IN NUMBER DEFAULT 262144); Description Sets the Java maximum heap size for an application to run in an Oracle Java virtual machine. Parameters maxsize Number of bytes for the Java maximum heap size. The default value is 262144 (256 MB). Usage Notes If you encounter the java.lang.OutOfMemoryError exception, you can use this procedure to increase the maximum heap size. If you specify a value greater than the system limit, the system limit is used. Examples The following example sets the Java maximum heap size to 524288 (512 MB). EXECUTE SDO_TOPO_MAP.SET_MAX_MEMORY_SIZE(524288); 4-76 Oracle Spatial Topology and Network Data Models SDO_TOPO_MAP.UPDATE_TOPO_MAP SDO_TOPO_MAP.UPDATE_TOPO_MAP Format SDO_TOPO_MAP.UPDATE_TOPO_MAP; Description Updates the topology to reflect edits made to the current updatable TopoMap object. Parameters None. Usage Notes Use this procedure to update the topology periodically during an editing session, as explained in Section 2.1.4. Updates are made, as needed, to the edge, face, and node information tables (described in Section 1.5). The TopoMap object remains open for further editing operations. The updates are not actually committed to the database until you call the SDO_TOPO_MAP.COMMIT_TOPO_MAP procedure. This procedure performs a level-0 validation of the TopoMap object before it updates the topology. (See the explanation of the level parameter for the SDO_TOPO_ MAP.VALIDATE_TOPO_MAP function.) If you caused in-memory R-tree indexes to be created when you loaded the TopoMap object (by specifying or accepting the default value of TRUE for the build_indexes parameter with the SDO_TOPO_MAP.LOAD_TOPO_MAP function or procedure), you can rebuild these indexes by using the SDO_TOPO_MAP.CREATE_EDGE_INDEX and SDO_TOPO_MAP.CREATE_FACE_INDEX procedures. For best index performance, these indexes should be rebuilt periodically when you are editing a large number of topological elements. Contrast this procedure with the SDO_TOPO_MAP.CLEAR_TOPO_MAP procedure, which clears the cache associated with a specified TopoMap object and makes the object read-only. To commit all TopoMap object changes, use the SDO_TOPO_MAP.COMMIT_TOPO_ MAP procedure. For information about using an in-memory cache to edit topological elements, see Section 2.1. This procedure is equivalent to using the updateTopology method of the TopoMap class of the client-side Java API (described in Section 1.8.2). Examples The following example updates the topology associated with the current updatable TopoMap object to reflect changes made to that object. EXECUTE SDO_TOPO_MAP.UPDATE_TOPO_MAP; SDO_TOPO_MAP Package Subprograms 4-77 SDO_TOPO_MAP.VALIDATE_TOPO_MAP SDO_TOPO_MAP.VALIDATE_TOPO_MAP Format SDO_TOPO_MAP.VALIDATE_TOPO_MAP( topo_map IN VARCHAR2, level IN NUMBER DEFAULT 1 ) RETURN VARCHAR2; Description Performs a first-order validation of a TopoMap object, and optionally (by default) checks the computational geometry also; returns the string TRUE if the structure of the topological elements in TopoMap object is consistent, and raises an exception if the structure of the topological elements in TopoMap object is not consistent. Parameters topo_map Name of the TopoMap object. (TopoMap objects are explained in Section 2.1.1.) level A value of 0 checks for the following conditions as part of a first-order validation: ■ All faces are closed, and none have infinite loops. ■ All previous and next edge pointers are consistent. ■ All edges meet at nodes. ■ Each island node is associated with a face. ■ All edges on a face boundary are associated with the face. A value of 1 (the default) checks for all conditions associated with a value of 0, plus the following conditions related to computational geometry: ■ Each island is inside the boundary of its associated face. ■ No edge intersects itself or another edge. ■ Start and end coordinates of edges match coordinates of nodes. ■ Node stars are properly ordered geometrically. Usage Notes This function checks the consistency of all pointer relationships among edges, nodes, and faces. You can use this function to validate an updatable TopoMap object before you update the topology (using the SDO_TOPO_MAP.UPDATE_TOPO_MAP procedure) or to validate a read-only TopoMap object before issuing queries. This function is equivalent to using the validateCache method of the TopoMap class of the client-side Java API (described in Section 1.8.2). 4-78 Oracle Spatial Topology and Network Data Models SDO_TOPO_MAP.VALIDATE_TOPO_MAP Examples The following example validates the topology in the TopoMap object named CITY_ DATA_TOPOMAP, and it returns a result indicating that the topology is valid. (The example refers to definitions and data from Section 1.12.1.) CALL SDO_TOPO_MAP.VALIDATE_TOPO_MAP('CITY_DATA_TOPOMAP') INTO :res_varchar; Call completed. PRINT res_varchar; RES_VARCHAR -------------------------------------------------------------------------------TRUE SDO_TOPO_MAP Package Subprograms 4-79 SDO_TOPO_MAP.VALIDATE_TOPOLOGY SDO_TOPO_MAP.VALIDATE_TOPOLOGY Format SDO_TOPO_MAP.VALIDATE_TOPOLOGY( topology IN VARCHAR2, ) RETURN VARCHAR2; or SDO_TOPO_MAP.VALIDATE_TOPOLOGY( topology IN VARCHAR2, prevent_updates IN VARCHAR2, level IN NUMBER DEFAULT 1 ) RETURN VARCHAR2; or SDO_TOPO_MAP.VALIDATE_TOPOLOGY( topology IN VARCHAR2, xmin IN NUMBER, ymin IN NUMBER, xmax IN NUMBER, ymax IN NUMBER ) RETURN VARCHAR2; or SDO_TOPO_MAP.VALIDATE_TOPOLOGY( topology IN VARCHAR2, xmin IN NUMBER, ymin IN NUMBER, xmax IN NUMBER, ymax IN NUMBER, prevent_updates IN VARCHAR2, level IN NUMBER DEFAULT 1 ) RETURN VARCHAR2; Description Loads an entire topology or a window (rectangular portion) of a topology into a TopoMap object; returns the string TRUE if the structure of the topology is consistent, and raises an exception if the structure of the topology is not consistent. 4-80 Oracle Spatial Topology and Network Data Models SDO_TOPO_MAP.VALIDATE_TOPOLOGY Parameters topology Name of the topology to be validated. Must not exceed 20 characters. xmin Lower-left X coordinate value for the window (rectangular portion of the topology) to be validated. ymin Lower-left Y coordinate value for the window (rectangular portion of the topology) to be validated. xmax Upper-right X coordinate value for the window (rectangular portion of the topology) to be validated. ymax Upper-right Y coordinate value for the window (rectangular portion of the topology) to be validated. prevent_updates TRUE prevents other users from updating the topology while the validation is being performed; FALSE allows other users to update the topology while the validation is being performed. If you specify FALSE, any topology changes made by other users while the validation is being performed will not be considered by this function and will not affect the result. level A value of 0 checks for the following conditions: ■ All faces are closed, and none have infinite loops. ■ All previous and next edge pointers are consistent. ■ All edges meet at nodes. ■ Each island node is associated with a face. ■ All edges on a face boundary are associated with the face. A value of 1 (the default) checks for all conditions associated with a value of 0, plus the following conditions related to computational geometry: ■ Each island is inside the boundary of its associated face. ■ No edge intersects itself or another edge. ■ Start and end coordinates of edges match coordinates of nodes. ■ Node stars are properly ordered geometrically. Usage Notes This function implicitly creates a TopoMap object, and removes the object after the validation is complete. (TopoMap objects are described in Section 2.1.1.) Examples The following example validates the topology named CITY_DATA, and it returns a result indicating that the topology is valid. (The example refers to definitions and data from Section 1.12.1.) SDO_TOPO_MAP Package Subprograms 4-81 SDO_TOPO_MAP.VALIDATE_TOPOLOGY CALL SDO_TOPO_MAP.VALIDATE_TOPOLOGY('CITY_DATA') INTO :res_varchar; Call completed. PRINT res_varchar; RES_VARCHAR -------------------------------------------------------------------------------TRUE 4-82 Oracle Spatial Topology and Network Data Models Part II Network Data Model This document has two main parts: ■ ■ Part I provides conceptual, usage, and reference information about the topology data model of Oracle Spatial. Part II provides conceptual, usage, and reference information about the network data model of Oracle Spatial. Much of the conceptual information in Part I also applies to the network data model. Therefore, if you develop network applications, you should be familiar with the main terms and concepts from both parts of this document. Part II contains the following chapters: ■ Chapter 5, "Network Data Model Overview" ■ Chapter 6, "SDO_NET Package Subprograms" ■ Chapter 7, "SDO_NET_MEM Package Subprograms" 5 Network Data Model Overview This chapter explains the concepts and operations related to the Oracle Spatial network data model. It assumes that you are familiar with the following information: ■ ■ The main topology concepts explained in Chapter 1, especially those related to nodes and links The main Oracle Spatial concepts, data types, and operations, as documented in Oracle Spatial User's Guide and Reference Although this chapter discusses some network-related terms as they relate to Oracle Spatial, it assumes that you are familiar with basic network data modeling concepts. This chapter contains the following major sections: ■ Section 5.1, "Introduction to Network Modeling" ■ Section 5.2, "Main Steps in Using the Network Data Model" ■ Section 5.3, "Network Data Model Concepts" ■ Section 5.4, "Network Applications" ■ Section 5.5, "Network Hierarchy" ■ Section 5.6, "Network Constraints" ■ Section 5.7, "Network Editing and Analysis Using a Network Memory Object" ■ Section 5.8, "Network Data Model Tables" ■ Section 5.9, "Network Data Model Metadata Views" ■ Section 5.10, "Network Data Model Application Programming Interface" ■ Section 5.11, "Network Examples (PL/SQL)" ■ Section 5.12, "Network Editor and Other Demo Files" ■ Section 5.13, "README File for Spatial and Related Features" 5.1 Introduction to Network Modeling In many applications, capabilities or objects are modeled as nodes and links in a network. The network model contains logical information such as connectivity relationships among nodes and links, directions of links, and costs of nodes and links. With logical network information, you can analyze a network and answer questions, many of them related to path computing and tracing. For example, for a biochemical pathway, you can find all possible reaction paths between two chemical compounds; or for a road network, you can find the following information: Network Data Model Overview 5-1 Introduction to Network Modeling ■ What is the shortest (distance) or fastest (travel time) path between two cities? ■ What is the closest hotel to a specific airport, and how can I get there? In additional to logical network information, spatial information such as node locations and link geometries can be associated with the network. This information can help you to model the logical information (such as the cost of a route, because its physical length can be directly computed from its spatial representation). The Spatial network data model can be used can be used for large, complex networks. For example, Figure 5–1 shows New York City nodes and links, which have been defined using the network data model, displayed using the Network Editor demo tool (described in Section 5.12). Figure 5–1 New York City Nodes and Links The generic data model and network analysis capability can model and analyze many kinds of network applications in addition to traditional geographical information systems (GIS). For example, in biochemistry, applications may need to model reaction pathway networks for living organisms; and in the pharmaceutical industry, applications that model the drug discovery process may need to model protein-protein interaction. The network modeling capabilities of Spatial include schema objects and an application programming interface (API). The schema objects include metadata and 5-2 Oracle Spatial Topology and Network Data Models Main Steps in Using the Network Data Model network tables. The API includes a server-side PL/SQL API (the SDO_NET and SDO_ NET_MEM packages) for creating, managing, editing, and analyzing networks in the database, and a middle-tier (or client-side) Java API for network editing and analysis. 5.2 Main Steps in Using the Network Data Model This section summarizes the main steps for working with the network data model in Oracle Spatial. It refers to important concepts, structures, and operations that are described in detail in other sections. There are two basic approaches to creating a network: ■ ■ Let Spatial perform most operations, using procedures with names in the form CREATE_ _NETWORK. (See Section 5.2.1.) Perform the operations yourself: create the necessary network tables and update the network metadata. (See Section 5.2.2.) With each approach, you must insert the network data into the network tables. You can then use the network data model PL/SQL and Java application programming interfaces (APIs) to update the network and perform other operations. (The PL/SQL and Java APIs are described in Section 5.10.) 5.2.1 Letting Spatial Perform Most Operations To create a network by letting Spatial perform most of the necessary operations, follow these steps: 1. Create the network using a procedure with a name in the form CREATE_ _NETWORK, where reflects the type of network that you want to create: ■ ■ ■ ■ SDO_NET.CREATE_SDO_NETWORK for a spatial network with non-LRS SDO_GEOMETRY objects SDO_NET.CREATE_LRS_NETWORK for a spatial network with LRS SDO_ GEOMETRY objects SDO_NET.CREATE_TOPO_NETWORK for a spatial network with topology geometry (SDO_TOPO_GEOMETRY) objects SDO_NET.CREATE_LOGICAL_NETWORK for a logical network that does not contain spatial information Each of these procedures creates the necessary network data model tables (described in Section 5.8) and inserts a row with the appropriate network metadata information into the xxx_SDO_NETWORK_METADATA views (described in Section 5.9.1). Each procedure has two formats: one format creates all network data model tables using default names for the tables and certain columns, and other format lets you specify names for the tables and certain columns. The default names for the network data model tables are _NODE$, _LINK$, _PATH$, and _PLINK$. The default name for cost columns in the network data model tables is COST, and the default name for geometry columns is GEOMETRY. 2. Insert data into the node and link tables, and if necessary into the path and path-link tables. (The node, link, path, and path-link tables are described in Section 5.8.) Network Data Model Overview 5-3 Main Steps in Using the Network Data Model 3. Validate the network, using the SDO_NET.VALIDATE_NETWORK procedure. 4. For a spatial (SDO or LRS) network, insert the appropriate information into the USER_SDO_GEOM_METADATA view, and create spatial indexes on the geometry columns. If you plan to use a view as a node, link, or path table, you must specify the view name for the TABLE_NAME column value when you insert information about the node, link, or path table in the USER_SDO_GEOM_METADATA view. 5.2.2 Performing the Operations Yourself To create a network by performing the necessary operations yourself, follow these steps: 1. Create the node table, using the SDO_NET.CREATE_NODE_TABLE procedure. (The node table is described in Section 5.8.1.) 2. Insert data into the node table. 3. Create the link table, using the SDO_NET.CREATE_LINK_TABLE procedure. (The link table is described in Section 5.8.2). 4. Insert data into the link table. 5. Optionally, create the path table, using the SDO_NET.CREATE_PATH_TABLE procedure. (The path table is described in Section 5.8.3). 6. If you created the path table, create the path-link table, using the SDO_ NET.CREATE_PATH_LINK_TABLE procedure. (The path-link table is described in Section 5.8.4). 7. If you created the path table and if you want to create paths, insert data into the table. 8. If you inserted data into the path table, insert the appropriate rows into the path-link table. 9. Insert a row into the USER_SDO_NETWORK_METADATA view with information about the network. (The USER_SDO_NETWORK_METADATA view is described in Section 5.9.1.) If you plan to use a view as a node, link, path, or path-link table, you must specify the view name for the relevant columns when you insert information about the network in the USER_SDO_NETWORK_METADATA view. 10. For a spatial (SDO or LRS) network, insert the appropriate information into the USER_SDO_GEOM_METADATA view, and create spatial indexes on the geometry columns. If you plan to use a view as a node, link, or path table, you must specify the view name for the TABLE_NAME column value when you insert information about the node, link, or path table in the USER_SDO_GEOM_METADATA view. 11. Validate the network, using the SDO_NET.VALIDATE_NETWORK function. You can change the sequence of some of these steps. For example, you can create both the node and link tables first, and then insert data into each one; and you can insert the row into the USER_SDO_NETWORK_METADATA view before you create the node and link tables. 5-4 Oracle Spatial Topology and Network Data Models Network Data Model Concepts 5.3 Network Data Model Concepts A network is a type of mathematical graph that captures relationships between objects using connectivity. The connectivity may or may not be based on spatial proximity. For example, if two towns are on opposite sides of a lake, the shortest path based on spatial proximity (a straight line across the middle of the lake) is not relevant if you want to drive from one town to the other. Instead, to find the shortest driving distance, you need connectivity information about roads and intersections and about the "cost" of individual links. A network consists of a set of nodes and links. Each link (sometimes also called an edge or a segment) specifies two nodes. A network can be directed (that is, by default, the start and end nodes determine link direction) or undirected (that is, links can be traversed in either direction). The following are some key terms related to the network data model: ■ ■ ■ ■ ■ ■ A node represents an object of interest. A link represents a relationship between two nodes. Within a directed network, any link can be bidirected (that is, able to be traversed either from the start node to the end node or from the end node to the start node) or unidirected (that is, able to be traversed only from the start node to the end node). Within an undirected network, all links are bidirected. A path is an alternating sequence of nodes and links, beginning and ending with nodes, and usually with no nodes and links appearing more than once. (Repeating nodes and links within a path are permitted, but are rare in most network applications.) A network is a set of nodes and links. A network is directed if the links that it contains are directed, and a network is undirected if the links that it contains are undirected. A logical network contains connectivity information but no geometric information. This is the model used for network analysis. A logical network can be treated as a directed graph or undirected graph, depending on the application. A spatial network contains both connectivity information and geometric information. In a spatial network, the nodes and links are SDO_GEOMETRY geometry objects without LRS information (an SDO network) or with LRS information (an LRS network), or SDO_TOPO_GEOMETRY objects (a topology geometry network). In an LRS network, each node includes a geometry ID value and a measure value, and each link includes a geometry ID value and start and end measure values; and the geometry ID value in each case refers to an SDO_GEOMETRY object with LRS information. A spatial network can be directed or undirected, depending on the application. ■ ■ A feature is an object of interest in a network application that is associated with a node or link. For example, in a transportation network, features include exits and intersections (mapped to nodes), and highways and streets (mapped to links). Cost is a non-negative numeric attribute that can be associated with links or nodes for computing the minimum cost path, which is the path that has the minimum total cost from a start node to an end node. You can specify a single cost factor, such as driving time or driving distance for links, in the network metadata, and network analytical functions that examine cost will use this specified cost factor. Network Data Model Overview 5-5 Network Applications ■ ■ ■ ■ ■ ■ ■ Duration is a non-negative numeric attribute that can be associated with links or nodes to specify a duration value for the link or node. The duration value can indicate a number of minutes or any other user-determined significance. You can specify a single duration factor, such as driving time for links, in the network metadata; however, if you use duration instead of cost to indicate elapsed time, network analytical functions that examine cost will not consider the specified duration factor. State is a string attribute, either ACTIVE or INACTIVE, that is associated with links or nodes to specify whether or not a link or node will be considered by network analysis functions. For example, if the state of a node is INACTIVE, any links from or to that node are ignored in the computation of the shortest path between two nodes. The state is ACTIVE by default when a link or node is created, but you can set the state INACTIVE. Type is a string attribute that can be associated with links or nodes to specify a user-defined value for the type of a link or a node. Temporary links, nodes, and paths exist only in a network memory object, and are not written to the database when the network memory object is written. For example, during a network analysis and editing session you might create temporary nodes to represent street addresses for shortest-path computations, but not save these temporary nodes when you save the results of editing operations. Reachable nodes are all nodes that can be reached from a given node. Reaching nodes are all nodes that can reach a given node. The degree of a node is the number of links to (that is, incident upon) the node. The in-degree is the number of inbound links, and the out-degree is the number of outbound links. A spanning tree of a connected graph is a tree (that is, a graph with no cycles) that connects all nodes of the graph. (The directions of links are ignored in a spanning tree.) The minimum cost spanning tree is the spanning tree that connects all nodes and has the minimum total cost. 5.4 Network Applications Networks are used in applications to find how different objects are connected to each other. The connectivity is often expressed in terms of adjacency and path relationships. Two nodes are adjacent if they are connected by a link. There are often several paths between any two given nodes, and you may want to find the path with the minimum cost. This section describes some typical examples of different kinds of network applications. 5.4.1 Road Network Example In a typical road network, the intersections of roads are nodes and the road segments between two intersections are links. The spatial representation of a road is not inherently related to the nodes and links in the network. For example, a shape point in the spatial representation of a road (reflecting a sharp turn in the road) is not a node in the network if that shape point is not associated with an intersection; and a single spatial object may make up several links in a network (such as a straight segment intersected by three crossing roads). An important operation with a road network is to find the path from a start point to an end point, minimizing either the travel time or 5-6 Oracle Spatial Topology and Network Data Models Network Hierarchy distance. There may be additional constraints on the path computation, such as having the path go through a particular landmark or avoid a particular intersection. 5.4.2 Train (Subway) Network Example The subway network of any major city is probably best modeled as a logical network, assuming that precise spatial representation of the stops and track lines is unimportant. In such a network, all stops on the system constitute the nodes of the network, and a link is the connection between two stops if a train travels directly between these two stops. Important operations with a train network include finding all stations that can be reached from a specified station, finding the number of stops between two specified stations, and finding the travel time between two stations. 5.4.3 Utility Network Example Utility networks, such as power line or cable networks, must often be configured to minimize the cost. An important operation with a utility network is to determine the connections among nodes, using minimum cost spanning tree algorithms, to provide the required quality of service at the minimum cost. Another important operation is reachability analysis, so that, for example, if a station in a water network is shut down, you know which areas will be affected. 5.4.4 Biochemical Network Example Biochemical processes can be modeled as biochemical networks to represent reactions and regulations in living organisms. For example, metabolic pathways are networks involved in enzymatic reactions, while regulatory pathways represent protein-protein interactions. In this example, a pathway is a network; genes, proteins, and chemical compounds are nodes; and reactions among nodes are links. Important operations for a biochemical network include computing paths and the degrees of nodes. 5.5 Network Hierarchy Some network applications require representations at different levels of abstraction. For example, two major processes might be represented as nodes with a link between them at the highest level of abstraction, and each major process might have several subordinate processes that are represented as nodes and links at the next level down. A network hierarchy enables you to represent a network with multiple levels of abstraction by assigning a hierarchy level to each node. (Links are not assigned a hierarchy level, and links can be between nodes in the same hierarchy level or in different levels.) The lowest (most detailed) level in the hierarchy is level 1, and successive higher levels are numbered 2, 3, and so on. Nodes at adjacent levels of a network hierarchy have parent-child relationships. Each node at the higher level can be the parent node for one or more nodes at the lower level. Each node at the lower level can be a child node of one node at the higher level. Sibling nodes are nodes that have the same parent node. Links can also have parent-child relationships. However, because links are not assigned to a hierarchy level, there is not necessarily a relationship between link parent-child relationships and network hierarchy levels. Sibling links are links that have the same parent link. Figure 5–2 shows a simple hierarchical network, in which there are two levels. Network Data Model Overview 5-7 Network Constraints Figure 5–2 Network Hierarchy Level 2 Level 1 As shown in Figure 5–2: ■ ■ ■ ■ The top level (level 2) contains two nodes. Each node is the parent node of several nodes in the bottom level. The link between the nodes in the top level is the parent link of two links between nodes in the bottom level. The bottom level (level 1) shows the nodes that make up each node in the top level. It also shows the links between nodes that are child nodes of each parent node in the top level, and two links between nodes that have different parent nodes. The links between nodes in the bottom level that have different parent nodes are shown with dark connecting lines. These links are child links of the single link between the nodes in the top level in the hierarchy. (However, these two links in the bottom level could also be defined as not being child links of any parent link between nodes in a higher level.) The parent-child relationships between each parent node and link and its child nodes and links are shown with dashed lines with arrowheads at both ends. Although it is not shown in Figure 5–2, links can cross hierarchy levels. For example, a link could be defined between a node in the top level and any node in the bottom level. In this case, there would not be a parent-child relationship between the links. 5.6 Network Constraints Network constraints are restrictions defined on network analysis computations. For example, a network constraint might list a series of prohibited turns in a roads network due to one-way streets and "No Left Turn" signs, with each prohibited turn represented as a pair of links (a start link and an end link onto which a turn cannot be made from the start link). As another example, a network constraint might require that driving routes must not include toll roads or must not include expressways. To create a network constraint, you must create a Java class that implements the constraint, and you must register the constraint by inserting a row for it in the USER_ SDO_NETWORK_CONSTRAINTS view (described in Section 5.9.2). To apply a network constraint to a network analysis operation, specify the constraint using the constraint parameter with the appropriate SDO_NET_MEM subprogram. 5-8 Oracle Spatial Topology and Network Data Models Network Editing and Analysis Using a Network Memory Object Examples of Java classes to implement network constraints are provided in the network data model demo files, which are described in Section 5.12. For example, the ProhibitedTurns.java file creates a network constraint that defines a series of prohibited turns, and it then returns the shortest path between two nodes, first without applying the constraint and then applying the constraint. 5.7 Network Editing and Analysis Using a Network Memory Object This section describes how to perform network editing and analysis operations using a network memory object, which is a cache in virtual memory. You can load a network or a hierarchy level in a network into a network memory object, perform operations on network objects in the memory object, and then either discard any changes or write the changes to the network in the database. Multiple network memory objects can exist at a time for a specified network, but only one can be updatable; any others must be read-only. For better performance, if you plan to use the network memory object only to retrieve information or to perform network analysis operations, make the network memory object read-only (that is, specify allow_updates=>’FALSE’ with the SDO_NET_MEM.NETWORK_ MANAGER.READ_NETWORK procedure). To work with a network memory object, you can use either the PL/SQL API (specifically, the SDO_NET_MEM package) or the Java API. Both APIs are introduced in Section 5.10. In the network data model PL/SQL API, the subprograms in the SDO_NET package operate on the network in the database, and the subprograms in the SDO_NET_MEM package operate on the network memory object in the cache. For some network editing operations (such as adding a node, link, or path), you can use either an SDO_NET or SDO_NET_MEM procedure; however, if you are performing a large number of editing operations, using the cache (SDO_NET_MEM procedures) offers better performance. Most network operations, though, can be performed only by a subprogram in the SDO_NET or SDO_NET_MEM package, and in these cases your decision about whether to use a network memory object depends on your specific needs. Example 5–1 uses a network memory object to add a new node and a new link to an existing network, perform a shortest path analysis, print the analysis results, and save the changes and analysis results in the database. These steps assume that a logical network named XYZ_NETWORK has already been created and populated using the statements shown in Example 5–5 in Section 5.11.4. Example 5–1 Using a Network Memory Object for Editing and Analysis (PL/SQL) DECLARE path_id res_numeric res_array indx NUMBER; NUMBER; SDO_NUMBER_ARRAY; NUMBER; BEGIN -- Create a network memory object in the user session for the -- logical network named XYZ_NETWORK. This creates a network -- object and reads all metadata, nodes, links, and paths in -- the network, and it allows for updates to be performed. sdo_net_mem.network_manager.read_network(net_mem=>'XYZ_NETWORK', allow_updates=>'TRUE'); -- Add a node with ID=901, and set its name to N901 and cost to 5. sdo_net_mem.network.add_node(net_mem=>'XYZ_NETWORK', node_id=>901, Network Data Model Overview 5-9 Network Data Model Tables node_name=>'N901', external_network_id=>0, external_node_id=>0); sdo_net_mem.node.set_cost(net_mem=>'XYZ_NETWORK', node_id=>901, cost=>5); -- Add a link with ID=9901, name=N901N1, cost=20 from node N901 to node N1. sdo_net_mem.network.add_link(net_mem=>'XYZ_NETWORK', link_id=>9901, link_name=>'N901N1', start_node_id=>901, end_node_id=>101, cost=>20); -- Perform a shortest path analysis from node N1 to node N5. path_id := sdo_net_mem.network_manager.shortest_path('XYZ_NETWORK', 101, 105); DBMS_OUTPUT.PUT_LINE('The ID of the shortest path from N1 to N5 is: ' || path_id); -- List the properties of the path: cost, nodes, and links. res_numeric := sdo_net_mem.path.get_cost('XYZ_NETWORK', path_id); DBMS_OUTPUT.PUT_LINE('The cost of this path is: ' || res_numeric); res_array:= sdo_net_mem.path.get_node_ids('XYZ_NETWORK', path_id); DBMS_OUTPUT.PUT('This path has the following nodes: '); FOR indx IN res_array.FIRST..res_array.LAST LOOP DBMS_OUTPUT.PUT(res_array(indx) || ' '); END LOOP; DBMS_OUTPUT.PUT_LINE(' '); res_array:= sdo_net_mem.path.get_link_ids('XYZ_NETWORK', path_id); DBMS_OUTPUT.PUT('This path has the following links: '); FOR indx IN res_array.FIRST..res_array.LAST LOOP DBMS_OUTPUT.PUT(res_array(indx) || ' '); END LOOP; DBMS_OUTPUT.PUT_LINE(' '); -- Add the path to the network memory object. sdo_net_mem.network.add_path(net_mem=>'XYZ_NETWORK', path_id=>path_id); -- Write changes to the database and commit changes. sdo_net_mem.network_manager.write_network(net_mem=>'XYZ_NETWORK'); -- Drop the network memory object. sdo_net_mem.network_manager.drop_network(net_mem=>'XYZ_NETWORK'); END; / The ID of the shortest path from N1 to N5 is: 1 The cost of this path is: 50 This path has the following nodes: 101 103 104 105 This path has the following links: 1102 1104 1105 5.8 Network Data Model Tables The connectivity information for a spatial network is stored in two tables: a node table and a link table. In addition, path information can be stored in a path table and a path-link table. You can have Spatial create these tables automatically when you create the network using a CREATE_ _NETWORK procedure; or you can create these tables using the SDO_NET.CREATE_NODE_TABLE, SDO_NET.CREATE_ LINK_TABLE, SDO_NET.CREATE_PATH_TABLE, and SDO_NET.CREATE_PATH_ LINK_TABLE procedures. These tables contain columns with predefined names, and you must not change any of the predefined column names; however, you can add columns to the tables by using the ALTER TABLE statement with the ADD COLUMN clause. For example, although each link and path table is created with a single COST column, you can create 5-10 Oracle Spatial Topology and Network Data Models Network Data Model Tables additional columns and associate them with other comparable attributes. Thus, to assign a driving time, scenic appeal rating, and a danger rating to each link, you could use the COST column for driving time, add columns for SCENIC_APPEAL and DANGER to the link table, and populate all three columns with values to be interpreted by applications. The following considerations apply to schema, table, and column names that are stored in any Oracle Spatial metadata views. For example, these considerations apply to the names of node, link, path, and path-link tables, and to the names of any columns in these tables that are stored in the network metadata views described in Section 5.9. ■ ■ The name must contain only letters, numbers, and underscores. For example, the name cannot contain a space ( ), an apostrophe ('), a quotation mark ("), or a comma (,). All letters in the names are converted to uppercase before the names are stored in metadata views or before the tables are accessed. This conversion also applies to any schema name specified with the table name. 5.8.1 Node Table Each network has a node table that can contain the columns described in Table 5–1. (The specific columns depend on the network type and whether the network is hierarchical or not.) Table 5–1 Node Table Columns Column Name Data Type Description NODE_ID NUMBER ID number that uniquely identifies this node within the network NODE_NAME VARCHAR2(32) Name of the node NODE_TYPE VARCHAR2(24) User-defined string to identify the node type ACTIVE VARCHAR2(1) Contains Y if the node is active (visible in the network), or N if the node is not active. PARTITION_ID NUMBER Reserved for future use , or GEOM_ID and MEASURE SDO_ GEOMETRY, or SDO_TOPO_ GEOMETRY, or NUMBER For a spatial (SDO, non-LRS) network, the SDO_ GEOMETRY object associated with the node For a spatial topology network, the SDO_TOPO_ GEOMETRY object associated with the node For a spatial LRS network, GEOM_ID and MEASURE column values (both of type NUMBER) for the geometry objects associated with the node For a logical network, this column is not used. For a spatial SDO or topology network, the actual column name is either a default name or what you specified as the geom_column parameter value in the call to the SDO_NET.CREATE_NODE_TABLE procedure. NUMBER Cost value to be associated with the node, for use by applications that use the network. The actual column name is either a default name or what you specified as the cost_column parameter value in the call to the SDO_NET.CREATE_NODE_TABLE procedure. The cost value can represent anything you want, for example, the toll to be paid at a toll booth. Network Data Model Overview 5-11 Network Data Model Tables Table 5–1 (Cont.) Node Table Columns Column Name Data Type Description HIERARCHY_ LEVEL NUMBER For hierarchical networks only: number indicating the level in the network hierarchy for this node. (Section 5.5 explains network hierarchy.) PARENT_ NODE_ID NUMBER For hierarchical networks only: node ID of the parent node of this node. (Section 5.5 explains network hierarchy.) 5.8.2 Link Table Each network has a link table that contains the columns described in Table 5–2. Table 5–2 Link Table Columns Column Name Data Type Description LINK_ID NUMBER ID number that uniquely identifies this link within the network LINK_NAME VARCHAR2(32) Name of the link START_NODE_ ID NUMBER Node ID of the node that starts the link END_NODE_ID NUMBER Node ID of the node that ends the link LINK_TYPE VARCHAR2(24) User-defined string to identify the link type ACTIVE VARCHAR2(1) Contains Y if the link is active (visible in the network), or N if the link is not active. LINK_LEVEL NUMBER Priority level for the link; used for hierarchical modeling, so that links with higher priority levels can be considered first in computing a path ; or GEOM_ID, START_ MEASURE, and END_ MEASURE SDO_ GEOMETRY, or SDO_TOPO_ GEOMETRY, or NUMBER For a spatial (SDO, non-LRS) network, the SDO_ GEOMETRY object associated with the link For a spatial topology network, the SDO_TOPO_ GEOMETRY object associated with the link For a spatial LRS network, GEOM_ID, START_ MEASURE, and END_MEASURE column values (all of type NUMBER) for the geometry objects associated with the link For a logical network, this column is not used. For a spatial SDO or topology network, the actual column name is either a default name or what you specified as the geom_column parameter value in the call to the SDO_NET.CREATE_LINK_TABLE procedure. NUMBER PARENT_LINK_ NUMBER ID Cost value to be associated with the link, for use by applications that use the network. The actual column name is either a default name or what you specified as the cost_column parameter value in the call to the SDO_NET.CREATE_LINK_TABLE procedure. The cost value can represent anything you want, for example, the estimated driving time for the link. For hierarchical networks only: link ID of the parent link of this link. (Section 5.5 explains parent-child relationships in a network hierarchy.) 5-12 Oracle Spatial Topology and Network Data Models Network Data Model Tables Table 5–2 (Cont.) Link Table Columns Column Name Data Type Description BIDIRECTED VARCHAR2(1) For directed networks only: contains Y if the link is bidirected (that is, can be traversed either from the start node to the end node or from the end node to the start node), or N if the link is unidirected (in one direction only, from the start node to the end node). 5.8.3 Path Table Each network can have a path table. A path is an ordered sequence of links, and is usually created as a result of network analysis. A path table provides a way to store the result of this analysis. For each path table, you must create an associated path-link table (described in Section 5.8.4). Each path table contains the columns described in Table 5–3. Table 5–3 Path Table Columns Column Name Data Type Description PATH_ID NUMBER ID number that uniquely identifies this path within the network PATH_NAME VARCHAR2(32) Name of the path PATH_TYPE VARCHAR2(24) User-defined string to identify the path type START_NODE_ ID NUMBER Node ID of the node that starts the first link in the path END_NODE_ID NUMBER Node ID of the node that ends the last link in the path COST NUMBER Cost value to be associated with the path, for use by applications that use the network. The cost value can represent anything you want, for example, the estimated driving time for the path. SIMPLE VARCHAR2(1) Contains Y if the path is a simple path, or N if the path is a complex path. In a simple path, the links form an ordered list that can be traversed from the start node to the end node with each link visited once. In a complex path, there are multiple options for going from the start node to the end node. SDO_ GEOMETRY For all network types except logical, the geometry object associated with the path. The actual column name is either a default name or what you specified as the geom_column parameter value in the call to the SDO_NET.CREATE_PATH_TABLE procedure. For a logical network, this column is not used. 5.8.4 Path-Link Table For each path table (described in Section 5.8.3), you must create a path-link table. Each row in the path-link table uniquely identifies a link within a path in a network; that is, each combination of PATH_ID, LINK_ID, and SEQ_NO values must be unique within the network. The order of rows in the path-link table is not significant. Each path-link table contains the columns described in Table 5–4. Network Data Model Overview 5-13 Network Data Model Metadata Views Table 5–4 Path-Link Table Columns Column Name Data Type Description PATH_ID NUMBER ID number of the path in the network LINK_ID NUMBER ID number of the link in the network SEQ_NO NUMBER Unique sequence number of the link in the path. (The sequence numbers start at 1.) Sequence numbers allow paths to contain repeating nodes and links. 5.9 Network Data Model Metadata Views There is a set of network metadata views for each schema (user): xxx_SDO_ NETWORK_METADATA, where xxx can be USER or ALL. These views are created by Spatial. 5.9.1 xxx_SDO_NETWORK_METADATA Views The following views contain information about networks: ■ ■ USER_SDO_NETWORK_METADATA contains information about all networks owned by the user. ALL_SDO_NETWORK_METADATA contains information about all networks on which the user has SELECT permission. If you create a network using one of the CREATE_ _NETWORK procedures, the information in these views is automatically updated to reflect the new network; otherwise, you must insert information about the network into the USER_ SDO_NETWORK_METADATA view. The USER_SDO_NETWORK_METADATA and ALL_SDO_NETWORK_METADATA views contain the same columns, as shown Table 5–5, except that the USER_SDO_ NETWORK_METADATA view does not contain the OWNER column. (The columns are listed in their order in the view definition.) Table 5–5 Columns in the xxx_SDO_NETWORK_METADATA Views Column Name Data Type Purpose OWNER VARCHAR2(32) Owner of the network (ALL_SDO_NETWORK_ METADATA view only) NETWORK VARCHAR2(24) Name of the network NETWORK_ID NUMBER ID number of the network; assigned by Spatial NETWORK_ CATEGORY VARCHAR2(12) Contains SPATIAL if the network nodes and links are associated with spatial geometries; contains LOGICAL if the network nodes and links are not associated with spatial geometries. A value of LOGICAL causes the network data model PL/SQL and Java APIs to ignore any spatial attributes of nodes, links, and paths. GEOMETRY_TYPE VARCHAR2(24) If NETWORK_CATEGORY is SPATIAL, contains a value indicating the geometry type of nodes and links: SDO_GEOMETRY for non-LRS SDO_ GEOMETRY objects, LRS_GEOMETRY for LRS SDO_GEOMETRY objects, TOPO_GEOMETRY for SDO_TOPO_GEOMETRY objects. NETWORK_TYPE VARCHAR2(24) User-defined string to identify the network type. 5-14 Oracle Spatial Topology and Network Data Models Network Data Model Metadata Views Table 5–5 (Cont.) Columns in the xxx_SDO_NETWORK_METADATA Views Column Name Data Type Purpose NO_OF_ HIERARCHY_ LEVELS NUMBER Number of levels in the network hierarchy. Contains 1 if there is no hierarchy. (See Section 5.5 for information about network hierarchy.) NO_OF_PARTITIONS NUMBER (Must be 1 for the current release. Other values may be supported in future releases.) LRS_TABLE_NAME VARCHAR2(32) If GEOMETRY_TYPE is SDO_GEOMETRY, contains the name of the table containing geometries associated with nodes. LRS_GEOM_ COLUMN VARCHAR2(32) If LRS_TABLE_NAME contains a table name, identifies the geometry column in that table. NODE_TABLE_ NAME VARCHAR2(32) If GEOMETRY_TYPE is SDO_GEOMETRY, contains the name of the table containing geometries associated with nodes. (The node table is described in Section 5.8.1.) NODE_GEOM_ COLUMN VARCHAR2(32) If NODE_TABLE_NAME contains a table name, identifies the geometry column in that table. NODE_COST_ COLUMN VARCHAR2(1024) If NODE_TABLE_NAME contains a table name, identifies the cost column in that table, or a PL/SQL function to compute the cost value. NODE_PARTITION_ COLUMN VARCHAR2(32) Reserved for future use. NODE_DURATION_ COLUMN VARCHAR2(32) If NODE_TABLE_NAME contains a table name, identifies the optional duration column in that table. This column can contain a numeric value that has any user-defined significance, such as a number of minutes associated with the node. LINK_TABLE_NAME VARCHAR2(32) If GEOMETRY_TYPE is SDO_GEOMETRY, contains the name of the table containing geometries associated with links. (The link table is described in Section 5.8.2.) LINK_GEOM_ COLUMN VARCHAR2(32) If LINK_TABLE_NAME contains a table name, identifies the geometry column in that table. LINK_DIRECTION VARCHAR2(12) Contains a value indicating the type for all links in the network: UNDIRECTED or DIRECTED. LINK_COST_ COLUMN VARCHAR2(1024) If LINK_TABLE_NAME contains a table name, identifies the optional numeric column containing a cost value for each link, or a PL/SQL function to compute the cost value. LINK_PARTITION_ COLUMN VARCHAR2(32) Reserved for future use. LINK_DURATION_ COLUMN VARCHAR2(32) If LINK_TABLE_NAME contains a table name, identifies the optional duration column in that table. This column can contain a numeric value that has any user-defined significance, such as a number of minutes associated with the link. PATH_TABLE_NAME VARCHAR2(32) Contains the name of an optional table containing information about paths. (The path table is described in Section 5.8.3.) PATH_GEOM_ COLUMN If PATH_TABLE_NAME is associated with a spatial network, identifies the geometry column in that table. VARCHAR2(32) Network Data Model Overview 5-15 Network Data Model Application Programming Interface Table 5–5 (Cont.) Columns in the xxx_SDO_NETWORK_METADATA Views Column Name Data Type Purpose PATH_LINK_TABLE_ VARCHAR2(32) NAME Contains the name of an optional table containing information about links for each path. (The path-link table is described in Section 5.8.4.) PARTITION_TABLE_ NAME VARCHAR2(32) Reserved for future use. TOPOLOGY VARCHAR2(32) For a spatial network containing SDO_TOPO_ GEOMETRY objects (creating using the SDO_ NET.CREATE_TOPO_NETWORK procedure), contains the name of the topology. 5.9.2 xxx_SDO_NETWORK_CONSTRAINTS Views The following views contain information about network constraints (described in Section 5.6): ■ ■ USER_SDO_NETWORK_CONSTRAINTS contains information about all network constraints owned by the user. ALL_SDO_NETWORK_CONSTRAINTS contains information about all network constraints on which the user has SELECT permission. To enable a network constraint to be specified with the constraint parameter in an SDO_NET_MEM subprogram, you must insert information about the network constraint into the USER_SDO_NETWORK_CONSTRAINTS view. The USER_SDO_NETWORK_CONSTRAINTS and ALL_SDO_NETWORK_ CONSTRAINTS views contain the same columns, as shown Table 5–6, except that the USER_SDO_NETWORK_CONSTRAINTS view does not contain the OWNER column. (The columns are listed in their order in the view definition.) Table 5–6 Columns in the xxx_SDO_NETWORK_CONSTRAINTS Views Column Name Data Type Purpose OWNER VARCHAR2(32) Owner of the network constraint (ALL_SDO_ NETWORK_CONSTRAINTS view only) CONSTRAINT VARCHAR2(32) Name of the network constraint DESCRIPTION VARCHAR2(200) Descriptive information about the network constraint, such as its purpose and any usage notes CLASS_NAME VARCHAR2(32) Name of the Java class that implements the network constraint CLASS BINARY FILE LOB The Java class that implements the network constraint 5.10 Network Data Model Application Programming Interface The Oracle Spatial network data model includes two client application programming interfaces (APIs): a PL/SQL interface provided by the SDO_NET and SDO_NET_ MEM packages and a Java interface. Both interfaces let you create and update network data, and perform network analysis. It is recommended that you use only PL/SQL or SQL to populate network tables and to create indexes, and that you use either PL/SQL or Java for application development. The following performance considerations apply to the PL/SQL and Java APIs: 5-16 Oracle Spatial Topology and Network Data Models Network Data Model Application Programming Interface ■ If you plan to analyze or edit only nonspatial aspects of a spatial network, you can get better performance by setting the NETWORK_CATEGORY column value to LOGICAL in the USER_SDO_NETWORK_METADATA view (described in Section 5.9.1) before performing the analysis or editing, and then changing the value back to SPATIAL afterward. For example, you could use this technique when finding the shortest path between two nodes, because the shortest-path computation considers cost values. However, you could not use this technique when setting the spatial geometry object or the end measure value for a link. ■ If you plan to modify any network objects (that is, if you plan to perform only network analysis operations or to retrieve network information), you can get better performance by creating the network memory object as read-only (that is, by specifying that updates are not allowed). 5.10.1 Network Data Model PL/SQL Interface The SDO_NET package provides subprograms for creating, accessing, and managing networks on a database server. The SDO_NET_MEM package, which implements capabilities available through the Java API, provides subprograms for editing network objects and performing network analysis using a cache object called a network memory object. Example 5–4 in Section 5.11 shows the use of SDO_NET functions and procedures. Section 5.7 explains how to use a network memory object, and it contains Example 5–1, which uses SDO_NET_MEM functions and procedures. The SDO_NET subprograms can be grouped into the following logical categories: ■ Creating networks: SDO_NET.CREATE_SDO_NETWORK SDO_NET.CREATE_LRS_NETWORK SDO_NET.CREATE_TOPO_NETWORK SDO_NET.CREATE_LOGICAL_NETWORK ■ Copying and deleting networks: SDO_NET.COPY_NETWORK SDO_NET.DROP_NETWORK ■ Creating network tables: SDO_NET.CREATE_NODE_TABLE SDO_NET.CREATE_LINK_TABLE SDO_NET.CREATE_PATH_TABLE SDO_NET.CREATE_PATH_LINK_TABLE SDO_NET.CREATE_LRS_TABLE ■ Validating network objects: SDO_NET.VALIDATE_NETWORK SDO_NET.VALIDATE_NODE_SCHEMA SDO_NET.VALIDATE_LINK_SCHEMA SDO_NET.VALIDATE_PATH_SCHEMA SDO_NET.VALIDATE_LRS_SCHEMA Network Data Model Overview 5-17 Network Data Model Application Programming Interface ■ Retrieving information (getting information about the network, checking for a characteristic): SDO_NET.GET_CHILD_LINKS SDO_NET.GET_CHILD_NODES SDO_NET.GET_GEOMETRY_TYPE SDO_NET.GET_IN_LINKS SDO_NET.GET_LINK_COST_COLUMN SDO_NET.GET_LINK_DIRECTION SDO_NET.GET_LINK_GEOM_COLUMN SDO_NET.GET_LINK_GEOMETRY SDO_NET.GET_LINK_TABLE_NAME SDO_NET.GET_LRS_GEOM_COLUMN SDO_NET.GET_LRS_LINK_GEOMETRY SDO_NET.GET_LRS_NODE_GEOMETRY SDO_NET.GET_LRS_TABLE_NAME SDO_NET.GET_NETWORK_TYPE SDO_NET.GET_NO_OF_HIERARCHY_LEVELS SDO_NET.GET_NO_OF_LINKS SDO_NET.GET_NO_OF_NODES SDO_NET.GET_NODE_DEGREE SDO_NET.GET_NODE_GEOM_COLUMN SDO_NET.GET_NODE_GEOMETRY SDO_NET.GET_NODE_IN_DEGREE SDO_NET.GET_NODE_OUT_DEGREE SDO_NET.GET_NODE_TABLE_NAME SDO_NET.GET_OUT_LINKS SDO_NET.GET_PATH_GEOM_COLUMN SDO_NET.GET_PATH_TABLE_NAME SDO_NET.IS_HIERARCHICAL SDO_NET.IS_LOGICAL SDO_NET.IS_SPATIAL SDO_NET.LRS_GEOMETRY_NETWORK SDO_NET.NETWORK_EXISTS SDO_NET.SDO_GEOMETRY_NETWORK SDO_NET.TOPO_GEOMETRY_NETWORK For reference information about each SDO_NET function and procedure, see Chapter 6. 5-18 Oracle Spatial Topology and Network Data Models Network Data Model Application Programming Interface The SDO_NET_MEM subprograms are grouped according to their associated object-related class in the oracle.spatial.network interface or class. You must specify a prefix after SDO_NET_MEM for each program, depending on its associated class (for example, SDO_NET_MEM.NETWORK_MANAGER.CREATE_LOGICAL_ NETWORK, SDO_NET_MEM.NETWORK.ADD_NODE, and SDO_NET_ MEM.NODE.GET_COST). Although this manual refers to "the SDO_NET_MEM package," the subprograms are actually implemented as methods of several object types. Thus, they are not listed by the statement DESCRIBE SDO_NET_MEM. Note: The SDO_NET_MEM subprogram groupings are as follows: ■ ■ ■ ■ ■ SDO_NET_MEM.NETWORK_MANAGER subprograms are related to the oracle.spatial.network.NetworkManager Java class. They enable you to create and drop network memory objects and to perform network analysis. SDO_NET_MEM.NETWORK subprograms are related to the oracle.spatial.network.Network Java interface. They enable you to add and delete nodes, links, and paths. SDO_NET_MEM.NODE subprograms are related to the oracle.spatial.network.Node Java interface. They enable you to get and set attributes for nodes. SDO_NET_MEM.LINK subprograms are related to the oracle.spatial.network.Link Java interface. They enable you to get and set attributes for links. SDO_NET_MEM.PATH subprograms are related to the oracle.spatial.network.Path Java interface. They enable you to get and set attributes for paths. The associations between SDO_NET_MEM subprograms and methods of the Java API are not necessarily exact. In some cases, a PL/SQL subprogram may combine operations and options from several methods. In addition, some Java methods do not have PL/SQL counterparts. Thus, the Usage Notes for subprograms state only that the function or procedure is analogous to a specific Java method, to indicate a logical relationship between the two. For detailed information about a specific Java method and others that may be related, see the Javadoc-generated API documentation (briefly explained in Section 5.10.2). For reference information about each SDO_NET_MEM function and procedure, see Chapter 7. 5.10.2 Network Data Model Java Interface The Java client interface for the network data model consists of the following classes and interfaces: ■ NetworkManager: class to load and store network data and metadata, and to perform network analysis ■ NetworkFactory: class to create elements related to the network ■ NetworkConstraint: class to create network constraints ■ Network: interface for a network Network Data Model Overview 5-19 Network Data Model Application Programming Interface ■ NetworkMetadata: interface for network metadata ■ GeometryMetadata: class for geometry metadata ■ Node: interface for a network node ■ Link: interface for a network link ■ Path: interface for a network path ■ MDPoint: interface for a multiple-dimension point ■ MBR: interface for a multiple-dimension minimum bounding rectangle ■ JGeometry: class for Oracle Java SDO_GEOMETRY ■ NetworkDataException: class for exceptions of network manager Figure 5–3 is a Unified Modeling Language (UML) diagram that shows the relationship between the main classes and interfaces. Figure 5–3 Java Classes and Interfaces for Network Data Model NetworkFactory Create Elements NetworkManager Network I/O Analysis NetworkConstraint 1 1 n n 2 1 0..n n<=4 GeometryMetadata NetworkMetadata 1 1 Node 1 1 Network 1 Link n n 1 0..n Path 1 1 1 0..1 0..1 0..1 JGeometry JGeometry JGeometry JGeometry LRS Referenced Geometry Section 5.10.2.3 lists the major interfaces and their methods. For detailed reference information about the network data model classes, see the Javadoc-generated API documentation: open index.html in a directory that includes the path sdonm/doc/javadoc. 5.10.2.1 Network Metadata and Data Management You can use the Java API to perform network metadata and data management operations such as the following: ■ Insert, delete, and modify node and link data ■ Load a network from a database ■ Store a network in a database ■ Store network metadata in a database ■ Modify network metadata attributes 5-20 Oracle Spatial Topology and Network Data Models Network Data Model Application Programming Interface 5.10.2.2 Network Analysis You can use the oracle.spatial.network.NetworkManager class to perform network analysis operations such as the following: ■ ■ ■ ■ ■ ■ ■ Shortest path (for directed and undirected networks): typical transitive closure problems in graph theory. Given a start and an end node, find the shortest path. Minimum cost spanning tree (for undirected networks): Given an undirected graph, find the minimum cost tree that connects all nodes. Reachability: Given a node, find all nodes that can reach that node, or find all nodes that can be reached by that node. Within-cost analysis (for directed and undirected networks): Given a target node and a cost, find all nodes that can be reached by the target node within the given cost. Nearest-neighbors analysis (for directed and undirected networks): Given a target node and number of neighbors, find the neighbor nodes and their costs to go to the given target node. All paths between two nodes: Given two nodes, find all possible paths between them. "Traveling salesman problem" (TSP) analysis: Given a set of nodes, find the most efficient (lowest-cost or shortest distance) path that visits all nodes, and optionally require that the start and end nodes be the same. 5.10.2.3 Major Interfaces and Methods in the Network Java API This section lists methods included in the major interfaces of the network data model Java API. For detailed reference information, see the Javadoc-generated API documentation: open index.html in a directory that includes the path sdonm/doc/javadoc. The oracle.spatial.network.NetworkManager class includes the following methods: allPairsShortestPath allPaths createNetworkPartitionTable createRandomGraph createRandomTree createRefConstraints disableRefConstraints dropNetwork dropRefConstraints enableRefConstraints findConnectedComponents findExternalLinks findInternalLinks findMBR findReachableNodes findReachingNodes getMaxFlow getNetworkIDFromName getNetworkIDs getNetworkNameFromID getNetworkNames getNodePartitionID getPartitionIDArray getPartitionLog Network Data Model Overview 5-21 Network Data Model Application Programming Interface getVersion initNodeLocation insertGeomMetadata isNetworkPartitioned isPartitionedByNode isReachable layout makeLogical makeSpatial mcst mcstLinkArray nearestNeighbors networkExists partitionNetwork readBlobNetwork readNetwork readNetworkByLinkPartition readNetworkByNodePartition readNetworkFromXML readNetworkMetadata readNetworkPartition shortestPath shortestPathAStar shortestPathDijkstra shortestPaths spatialCluster tspPath validateNetworkSchema withinCost writeNetwork writeNetworkMetadata writeNetworkPartition writeNetworkToXML The oracle.spatial.network.Network interface includes the following methods: addTemporaryNode addLink addLinks addNetwork addNode addNodes addPath addPaths clear clearTemporaryCache clone containsLink containsNode containsPath deleteTemporaryElements deleteLink deleteNetwork deleteNode deletePath getTemporaryLinkArray getTemporaryNodeArray getExternalLinks getExternalNetworkIDs getExternalNodes 5-22 Oracle Spatial Topology and Network Data Models Network Data Model Application Programming Interface getLink getLinkArray getLinkCostColumn getLinkDurationColumn getLinkGeomColumn getLinkHierarchyLevelArray getLinkPartitionColumn getLinks getLinksByPartitionID getLinkTableName getLRSGeomColumn getLRSTableName getMaxLinkID getMaxNodeID getMaxPathID getMBR getMetadata getMetadataViewName getName getNetworkAt getNetworkCache getNetworkID getNode getNodeArray getNodeCostColumn getNodeDurationColumn getNodeGeomColumn getNodeHierarchyLevelArray getNodePartitionColumn getNodes getNodesByPartitionID getNodeTableName getNoOfHierarchyLevels getNoOfLinks getNoOfNodes getNoOfPartitions getNoOfPaths getPartitionID getPartitionTableName getPath getPathArray getPathGeomColumn getPathLinkTableName getPaths getPathsByPartitionID getPathTableName getSubNetwork getUserData hasNodeCost hasStringID intersectNetwork isBidirected isConnected isDirected isHierarchical isLogical isLRSGeometry isModified isPartition isPartitioned Network Data Model Overview 5-23 Network Data Model Application Programming Interface isPersistent isReadOnly isSDOGeometry isSimple isSpatial isTopoGeometry isTree isUndirected partitionedByLink partitionedByNode resetComponentNo setCategory setLinkDurationColumn setLinkPartitionColumn setNodeDurationColumn setNodePartitionColumn setNoOfHierarchyLevels setPartitionTableName setStringIDIndex setTemporaryCaching setUserData The oracle.spatial.network.Link interface includes the following methods: clone getChildLinkArray getChildLinks getCoLinks getCost getDuration getEndMeasure getEndNode getFlow getGeometry getGeomID getID getLinkLevel getName getNetwork getParentLink getPartitionID getSiblingLinkArray getSiblings getStartMeasure getStartNode getState getType getUserData isActive isBidirected isTemporary isExternalLink isLogical isUnidirected makeTemporary otherNode setBidirected setCost setDuration setEndNode setFlow 5-24 Oracle Spatial Topology and Network Data Models Network Data Model Application Programming Interface setGeometry setGeomID setLinkLevel setMeasure setName setParentLink setPartitionID setStartNode setState setType setUserData The oracle.spatial.network.Node interface includes the following methods: clone findLinks getAdjacentNodeArray getAdjacentNodes getChildNodeArray getChildNodes getComponentNo getCost getDuration getExternalNetworkID getExternalNetworkName getExternalNodeID getGeometry getGeomID getHierarchyLevel getID getIncidentLinks getInLinks getMDPoint getMeasure getName getNetwork getOutLinks getParentNode getPartitionID getSiblingNodeArray getSiblings getState getType getUserData isActive isTemporary isExternalNode isLogical isMarked linkExists makeTemporary setComponentNo setCost setDuration setExternalNetworkID setExternalNodeID setGeometry setGeomID setHierarchyLevel setMDPoint setMeasure Network Data Model Overview 5-25 Network Examples (PL/SQL) setName setParentNode setPartitionID setState setType setUserData The oracle.spatial.network.Path interface includes the following methods: clone computeGeometry contains(Link l) contains(Node n) contains(Path path) getCost getDuration getEndNode getGeometry getID getLinkArray getLinkAt getLinks getName getNetwork getNodeArray getNodeAt getNodes getNoOfLinks getStartNode getState getType getUserData isActive isClosed isConnected isLogical isSimple isTemporary setGeometry setID setName setType setUserData size 5.11 Network Examples (PL/SQL) This section presents simplified examples that use the network data model PL/SQL API. It includes the following sections: ■ Section 5.11.1, "Simple Spatial (SDO) Network Example" ■ Section 5.11.2, "Simple Logical Network Example" ■ Section 5.11.3, "Spatial (LRS) Network Example" ■ Section 5.11.4, "Logical Hierarchical Network Example" The examples refer to concepts that are explained in this chapter, and they use functions and procedures documented in Chapter 6. 5-26 Oracle Spatial Topology and Network Data Models Network Examples (PL/SQL) 5.11.1 Simple Spatial (SDO) Network Example This section presents an example of a very simple spatial (SDO, not LRS) network that contains three nodes and a link between each node. The network is illustrated in Figure 5–4. Figure 5–4 Simple Spatial (SDO) Network 5 N3 4 3 L3 2 1 N1 0 1 L2 L1 2 3 4 5 6 N2 7 8 9 10 11 12 13 14 15 As shown in Figure 5–4, node N1 is at point 1,1, node N2 is at point 15,1, and node N3 is at point 9,4. Link L1 is a straight line connecting nodes N1 and N2, link L2 is a straight line connecting nodes N2 and N3, and link L3 is a straight line connecting nodes N3 and N1. There are no other nodes or shape points on any of the links. Example 5–2 does the following: ■ ■ ■ In a call to the SDO_NET.CREATE_SDO_NETWORK procedure, creates the SDO_ NET1 directed network; creates the SDO_NET1_NODE$, SDO_NET1_LINK$, SDO_NET1_PATH$, and SDO_NET1_PLINK$ tables; and updates the xxx_SDO_ NETWORK_METADATA views. All geometry columns are named GEOMETRY. Both the node and link tables contain a cost column named COST. Populates the node, link, path, and path-link tables. It inserts three rows into the node table, three rows into the link table, two rows into the path table, and four rows into the path-link table. Updates the Oracle Spatial metadata, and creates spatial indexes on the GEOMETRY columns of the node and link tables. (These actions are not specifically related to network management, but that are necessary if applications are to benefit from spatial indexing on these geometry columns.) Example 5–2 does not show the use of many SDO_NET functions and procedures; these are included in Example 5–4 in Section 5.11.3. Example 5–2 Simple Spatial (SDO) Network Example (PL/SQL) -- Create the SDO_NET1 directed network. Also creates the SDO_NET1_NODE$, -- SDO_NET1_LINK$, SDO_NET1_PATH$, SDO_NET1_PLINK$ tables, and updates -- USER_SDO_NETWORK_METADATA. All geometry columns are named GEOMETRY. -- Both the node and link tables contain a cost column named COST. EXECUTE SDO_NET.CREATE_SDO_NETWORK('SDO_NET1', 1, TRUE, TRUE); -- Populate the SDO_NET1_NODE$ table. -- N1 INSERT INTO sdo_net1_node$ (node_id, node_name, active, geometry, cost) VALUES(1, 'N1', 'Y', SDO_GEOMETRY(2001, NULL, SDO_POINT_TYPE(1,1,NULL), NULL, NULL), 5); -- N2 INSERT INTO sdo_net1_node$ (node_id, node_name, active, geometry, cost) VALUES(2, 'N2', 'Y', SDO_GEOMETRY(2001, NULL, SDO_POINT_TYPE(15,1,NULL), NULL, NULL), Network Data Model Overview 5-27 Network Examples (PL/SQL) 8); -- N3 INSERT INTO sdo_net1_node$ (node_id, node_name, active, geometry, cost) VALUES(3, 'N3', 'Y', SDO_GEOMETRY(2001, NULL, SDO_POINT_TYPE(9,4,NULL), NULL, NULL), 4); -- Populate the SDO_NET1_LINK$ table. -- L1 INSERT INTO sdo_net1_link$ (link_id, link_name, start_node_id, end_node_id, active, geometry, cost, bidirected) VALUES(1, 'L1', 1, 2, 'Y', SDO_GEOMETRY(2002, NULL, NULL, SDO_ELEM_INFO_ARRAY(1,2,1), SDO_ORDINATE_ARRAY(1,1, 15,1)), 14, 'Y'); -- L2 INSERT INTO sdo_net1_link$ (link_id, link_name, start_node_id, end_node_id, active, geometry, cost, bidirected) VALUES(2, 'L2', 2, 3, 'Y', SDO_GEOMETRY(2002, NULL, NULL, SDO_ELEM_INFO_ARRAY(1,2,1), SDO_ORDINATE_ARRAY(15,1, 9,4)), 10, 'Y'); -- L3 INSERT INTO sdo_net1_link$ (link_id, link_name, start_node_id, end_node_id, active, geometry, cost, bidirected) VALUES(3, 'L3', 3, 1, 'Y', SDO_GEOMETRY(2002, NULL, NULL, SDO_ELEM_INFO_ARRAY(1,2,1), SDO_ORDINATE_ARRAY(9,4, 1,1)), 10, 'Y'); -- Do not populate the SDO_NET1_PATH$ and SDO_NET1_PLINK$ tables now. -- Do this only when you need to create any paths. ---------------------------------------------------------------------------- REMAINING STEPS NEEDED TO USE SPATIAL INDEXES ----------------------------------------------------------------------------- Update the USER_SDO_GEOM_METADATA view. This is required before the -- spatial index can be created. Do this only once for each layer -- (that is, table-column combination). INSERT INTO user_sdo_geom_metadata (TABLE_NAME, COLUMN_NAME, DIMINFO, SRID) VALUES ( 'SDO_NET1_NODE$', 'GEOMETRY', SDO_DIM_ARRAY( -- 20X20 grid SDO_DIM_ELEMENT('X', 0, 20, 0.005), SDO_DIM_ELEMENT('Y', 0, 20, 0.005) ), NULL -- SRID (spatial reference system, also called coordinate system) ); INSERT INTO user_sdo_geom_metadata (TABLE_NAME, COLUMN_NAME, 5-28 Oracle Spatial Topology and Network Data Models Network Examples (PL/SQL) DIMINFO, SRID) VALUES ( 'SDO_NET1_LINK$', 'GEOMETRY', SDO_DIM_ARRAY( -- 20X20 grid SDO_DIM_ELEMENT('X', 0, 20, 0.005), SDO_DIM_ELEMENT('Y', 0, 20, 0.005) ), NULL -- SRID (spatial reference system, also called coordinate system) ); -- Create the spatial indexes CREATE INDEX sdo_net1_nodes_idx ON sdo_net1_node$(geometry) INDEXTYPE IS MDSYS.SPATIAL_INDEX; CREATE INDEX sdo_net1_links_idx ON sdo_net1_link$(geometry) INDEXTYPE IS MDSYS.SPATIAL_INDEX; 5.11.2 Simple Logical Network Example This section presents an example of a very simple logical network that contains three nodes and a link between the nodes. The network is illustrated in Figure 5–5. Figure 5–5 Simple Logical Network N3 L3 N1 L2 L1 N2 As shown in Figure 5–5, link L1 is a straight line connecting nodes N1 and N2, link L2 is a straight line connecting nodes N2 and N3, and link L3 is a straight line connecting nodes N3 and N1. There are no other nodes on any of the links. Example 5–3 calls the SDO_NET.CREATE_LOGICAL_NETWORK procedure, which does the following: creates the LOG_NET1 directed network; creates the LOG_NET1_ NODE$, LOG_NET1_LINK$, LOG_NET1_PATH$, and LOG_NET1_PLINK$ tables; and updates the xxx_SDO_NETWORK_METADATA views. Both the node and link tables contain a cost column named COST. (Because this is a logical network, there are no geometry columns.) The example also populates the node and link tables. Example 5–3 does not show the use of many SDO_NET functions and procedures; these are included in the logical hierarchical network example (Example 5–5) in Section 5.11.4. Example 5–3 Simple Logical Network Example (PL/SQL) -- Create the LOG_NET1 directed logical network. Also creates the -- LOG_NET1_NODE$, LOG_NET1_LINK$, LOG_NET1_PATH$, -- and LOG_NET1_PLINK$ tables, and updates USER_SDO_NETWORK_METADATA. -- Both the node and link tables contain a cost column named COST. EXECUTE SDO_NET.CREATE_LOGICAL_NETWORK('LOG_NET1', 1, TRUE, TRUE); -- Populate the LOG_NET1_NODE$ table. -- N1 INSERT INTO log_net1_node$ (node_id, node_name, active, cost) VALUES (1, 'N1', 'Y', 2); Network Data Model Overview 5-29 Network Examples (PL/SQL) -- N2 INSERT INTO log_net1_node$ (node_id, node_name, active, cost) VALUES (2, 'N2', 'Y', 3); -- N3 INSERT INTO log_net1_node$ (node_id, node_name, active, cost) VALUES (3, 'N3', 'Y', 2); -- Populate the LOG_NET1_LINK$ table. -- L1 INSERT INTO log_net1_link$ (link_id, link_name, start_node_id, end_node_id, active, link_level, cost) VALUES (1, 'L1', 1, 2, 'Y', 1, 10); -- L2 INSERT INTO log_net1_link$ (link_id, link_name, start_node_id, end_node_id, active, link_level, cost) VALUES (2, 'L2', 2, 3, 'Y', 1, 7); -- L3 INSERT INTO log_net1_link$ (link_id, link_name, start_node_id, end_node_id, active, link_level, cost) VALUES (3, 'L3', 3, 1, 'Y', 1, 8); -- Do not populate the LOG_NET1_PATH$ and LOG_NET1_PLINK$ tables now. -- Do this only when you need to create any paths. 5.11.3 Spatial (LRS) Network Example This section presents an example of a spatial (LRS) network that uses the roads (routes) illustrated in Figure 5–6. Each road is built from individual line segments (associated with links) taken from one or more road segment geometries, which are also shown in the figure. Figure 5–6 Roads and Road Segments for Spatial (LRS) Network Example Route3 end Route1 end Route2 end R3L2 N8 N7 15 14 13 12 11 R1L6 10 9 8 7 6 N6 1 2 3 4 5 6 N3 N7 R1L5 N8 N7 R3L1 R2L1 5 N2 R1L2 4 3 R1L1 2 N1 1 Route1 start 0 R2L2 Road_Segment3 N8 N6 Route3 start N5 N6 Road_Segment4 N5 N5 R1L4 R1L3 N4 N3 Road_Segment2 Route2 start N2 N4 N3 N4 Road_Segment1 7 8 9 10 11 12 13 14 15 N1 As shown in Figure 5–6: ■ Route1 starts at point 2,2 and ends at point 5,14. It has the following nodes: N1, N2, N3, N4, N5, N6, and N7. It has the following links: R1L1, R1L2, R1L3, R1L4, R1L5, and R1L6. 5-30 Oracle Spatial Topology and Network Data Models Network Examples (PL/SQL) ■ ■ ■ Route2 starts at point 8,4 and ends at point 8,13. It has the following nodes: N3, N6, and N8. It has the following links: R2L1 and R2L2. Route3 starts at point 12,10 and ends at point 5,14. It has the following nodes: N5, N8, and N7. It has the following links: R3L1 and R3L2. The four road segment geometries are shown individually on the right side of the figure. (The points on each segment are labeled with their associated node names, to clarify how each segment geometry fits into the illustration on the left side.) Example 5–4 does the following: ■ Creates a table to hold the road segment geometries. ■ Inserts four road segment geometries into the table. ■ Inserts the spatial metadata into the USER_SDO_GEOM_METADATA view. ■ Creates a spatial index on the geometry column in the ROAD_SEGMENTS table. ■ Creates and populates the node table. ■ Creates and populates the link table. ■ Creates and populates the path table and path-link table, for possible future use. (Before an application can use paths, you must populate these two tables.) ■ Inserts network metadata into the USER_SDO_NETWORK_METADATA view. ■ Uses various SDO_NET and SDO_NET_MEM functions and procedures. Example 5–4 Spatial (LRS) Network Example (PL/SQL) ---------------------------------------------------------------------------- CREATE AND POPULATE TABLE ----------------------------------------------------------------------------- Create a table for road segments. Use LRS. CREATE TABLE road_segments ( segment_id NUMBER PRIMARY KEY, segment_name VARCHAR2(32), segment_geom SDO_GEOMETRY, geom_id NUMBER); -- Populate the table with road segments. INSERT INTO road_segments VALUES( 1, 'Segment1', SDO_GEOMETRY( 3302, -- line string, 3 dimensions (X,Y,M), 3rd is measure dimension NULL, NULL, SDO_ELEM_INFO_ARRAY(1,2,1), -- one line string, straight segments SDO_ORDINATE_ARRAY( 2,2,0, -- Starting point - Node1; 0 is measure from start. 2,4,2, -- Node2; 2 is measure from start. 8,4,8, -- Node3; 8 is measure from start. 12,4,12) -- Node4; 12 is measure from start. ), 1001 ); INSERT INTO road_segments VALUES( 2, 'Segment2', SDO_GEOMETRY( Network Data Model Overview 5-31 Network Examples (PL/SQL) 3302, -- line string, 3 dimensions (X,Y,M), 3rd is measure dimension NULL, NULL, SDO_ELEM_INFO_ARRAY(1,2,1), -- one line string, straight segments SDO_ORDINATE_ARRAY( 8,4,0, -- Node3; 0 is measure from start. 8,10,6, -- Node6; 6 is measure from start. 8,13,9) -- Ending point - Node8; 9 is measure from start. ), 1002 ); INSERT INTO road_segments VALUES( 3, 'Segment3', SDO_GEOMETRY( 3302, -- line string, 3 dimensions (X,Y,M), 3rd is measure dimension NULL, NULL, SDO_ELEM_INFO_ARRAY(1,2,1), -- one line string, straight segments SDO_ORDINATE_ARRAY( 12,4,0, -- Node4; 0 is measure from start. 12,10,6, -- Node5; 6 is measure from start. 8,13,11, -- Node8; 11 is measure from start. 5,14,14.16) -- Ending point - Node7; 14.16 is measure from start. ), 1003 ); INSERT INTO road_segments VALUES( 4, 'Segment4', SDO_GEOMETRY( 3302, -- line string, 3 dimensions (X,Y,M), 3rd is measure dimension NULL, NULL, SDO_ELEM_INFO_ARRAY(1,2,1), -- one line string, straight segments SDO_ORDINATE_ARRAY( 12,10,0, -- Node5; 0 is measure from start. 8,10,4, -- Node6; 4 is measure from start. 5,14,9) -- Ending point - Node7; 9 is measure from start. ), 1004 ); ---------------------------------------------------------------------------- UPDATE THE SPATIAL METADATA ----------------------------------------------------------------------------- Update the USER_SDO_GEOM_METADATA view. This is required before the -- spatial index can be created. Do this only once for each layer -- (that is, table-column combination; here: road_segment and segment_geom). INSERT INTO user_sdo_geom_metadata (TABLE_NAME, COLUMN_NAME, DIMINFO, SRID) VALUES ( 'ROAD_SEGMENTS', 'SEGMENT_GEOM', SDO_DIM_ARRAY( -- 20X20 grid SDO_DIM_ELEMENT('X', 0, 20, 0.005), SDO_DIM_ELEMENT('Y', 0, 20, 0.005), SDO_DIM_ELEMENT('M', 0, 20, 0.005) -- Measure dimension 5-32 Oracle Spatial Topology and Network Data Models Network Examples (PL/SQL) ), NULL ); -- SRID (spatial reference system, also called coordinate system) -------------------------------------------------------------------- CREATE THE SPATIAL INDEX -------------------------------------------------------------------CREATE INDEX road_segments_idx ON road_segments(segment_geom) INDEXTYPE IS MDSYS.SPATIAL_INDEX; --------------------------------- USE SDO_NET SUBPROGRAMS ------------------------------------------- This procedure does not use the CREATE_LRS_NETWORK procedure. Instead, the user creates the network tables and populates the network metadata view. Basic steps: 1. Create and populate the node table. 2. Create and populate the link table. 3. Create the path table and paths and links table (for possible future use, before which they will need to be populated). 4. Populate the network metadata (USER_SDO_NETWORK_METADATA). Note: Can be done before or after Steps 1-3. 5. Use various SDO_NET functions and procedures. 6. Use SDO_NET_MEM functions and procedures for analysis and editing. -- 1. Create and populate the node table. EXECUTE SDO_NET.CREATE_NODE_TABLE('ROADS_NODES', 'LRS_GEOMETRY', 'NODE_GEOMETRY', 'COST', 1); -- Populate the node table. -- N1 INSERT INTO roads_nodes (node_id, node_name, active, geom_id, measure) VALUES (1, 'N1', 'Y', 1001, 0); -- N2 INSERT INTO roads_nodes (node_id, node_name, active, geom_id, measure) VALUES (2, 'N2', 'Y', 1001, 2); -- N3 INSERT INTO roads_nodes (node_id, node_name, active, geom_id, measure) VALUES (3, 'N3', 'Y', 1001, 8); -- N4 INSERT INTO roads_nodes (node_id, node_name, active, geom_id, measure) VALUES (4, 'N4', 'Y', 1001, 12); -- N5 INSERT INTO roads_nodes (node_id, node_name, active, geom_id, measure) VALUES (5, 'N5', 'Y', 1004, 0); -- N6 INSERT INTO roads_nodes (node_id, node_name, active, geom_id, measure) VALUES (6, 'N6', 'Y', 1002, 6); -- N7 INSERT INTO roads_nodes (node_id, node_name, active, geom_id, measure) VALUES (7, 'N7', 'Y', 1004, 9); Network Data Model Overview 5-33 Network Examples (PL/SQL) -- N8 INSERT INTO roads_nodes (node_id, node_name, active, geom_id, measure) VALUES (8, 'N8', 'Y', 1002, 9); -- 2. Create and populate the link table. EXECUTE SDO_NET.CREATE_LINK_TABLE('ROADS_LINKS', 'LRS_GEOMETRY', 'LINK_GEOMETRY', 'COST', 1); -- Populate the link table. -- Route1, Link1 INSERT INTO roads_links (link_id, link_name, start_node_id, end_node_id, active, cost, geom_id, start_measure, end_measure) VALUES (101, 'R1L1', 1, 2, 'Y', 3, 1001, 0, 2); -- Route1, Link2 INSERT INTO roads_links (link_id, link_name, start_node_id, end_node_id, active, cost, geom_id, start_measure, end_measure) VALUES (102, 'R1L2', 2, 3, 'Y', 15, 1001, 2, 8); -- Route1, Link3 INSERT INTO roads_links (link_id, link_name, start_node_id, end_node_id, active, cost, geom_id, start_measure, end_measure) VALUES (103, 'R1L3', 3, 4, 'Y', 10, 1001, 8, 12); -- Route1, Link4 INSERT INTO roads_links (link_id, link_name, start_node_id, end_node_id, active, cost, geom_id, start_measure, end_measure) VALUES (104, 'R1L4', 4, 5, 'Y', 15, 1003, 0, 6); -- Route1, Link5 INSERT INTO roads_links (link_id, link_name, start_node_id, end_node_id, active, cost, geom_id, start_measure, end_measure) VALUES (105, 'R1L5', 5, 6, 'Y', 10, 1004, 0, 4); -- Route1, Link6 INSERT INTO roads_links (link_id, link_name, start_node_id, end_node_id, active, cost, geom_id, start_measure, end_measure) VALUES (106, 'R1L6', 6, 7, 'Y', 7, 1004, 4, 9); -- Route2, Link1 (cost = 30, a slow drive) INSERT INTO roads_links (link_id, link_name, start_node_id, end_node_id, active, cost, geom_id, start_measure, end_measure) VALUES (201, 'R2L1', 3, 6, 'Y', 30, 1002, 0, 6); -- Route2, Link2 INSERT INTO roads_links (link_id, link_name, start_node_id, end_node_id, active, cost, geom_id, start_measure, end_measure) VALUES (202, 'R2L2', 6, 8, 'Y', 5, 1002, 6, 9); -- Route3, Link1 INSERT INTO roads_links (link_id, link_name, start_node_id, end_node_id, active, cost, geom_id, start_measure, end_measure) VALUES (301, 'R3L1', 5, 8, 'Y', 5, 1003, 6, 11); -- Route3, Link2 INSERT INTO roads_links (link_id, link_name, start_node_id, end_node_id, active, cost, geom_id, start_measure, end_measure) VALUES (302, 'R3L2', 8, 7, 'Y', 5, 1003, 11, 14.16); 5-34 Oracle Spatial Topology and Network Data Models Network Examples (PL/SQL) -- 3. Create the path table (to store created paths) and the path-link -table (to store links for each path) for possible future use, -before which they will need to be populated. EXECUTE SDO_NET.CREATE_PATH_TABLE('ROADS_PATHS', 'PATH_GEOMETRY'); EXECUTE SDO_NET.CREATE_PATH_LINK_TABLE('ROADS_PATHS_LINKS'); -- 4. Populate the network metadata (USER_SDO_NETWORK_METADATA). INSERT INTO user_sdo_network_metadata (NETWORK, NETWORK_CATEGORY, GEOMETRY_TYPE, NETWORK_TYPE, NO_OF_HIERARCHY_LEVELS, NO_OF_PARTITIONS, LRS_TABLE_NAME, LRS_GEOM_COLUMN, NODE_TABLE_NAME, NODE_GEOM_COLUMN, NODE_COST_COLUMN, LINK_TABLE_NAME, LINK_GEOM_COLUMN, LINK_DIRECTION, LINK_COST_COLUMN, PATH_TABLE_NAME, PATH_GEOM_COLUMN, PATH_LINK_TABLE_NAME) VALUES ( 'ROADS_NETWORK', -- Network name 'SPATIAL', -- Network category 'LRS_GEOMETRY', -- Geometry type 'Roadways', -- Network type (user-defined) 1, -- No. of levels in hierarchy 1, -- No. of partitions 'ROAD_SEGMENTS', -- LRS table name 'SEGMENT_GEOM' , -- LRS geometry column 'ROADS_NODES', -- Node table name 'NODE_GEOMETRY', -- Node geometry column 'COST', -- Node cost column 'ROADS_LINKS', -- Link table name 'LINK_GEOMETRY', -- Link geometry column 'DIRECTED', -- Link direction 'COST', -- Link cost column 'ROADS_PATHS', -- Path table name 'PATH_GEOMETRY', -- Path geometry column 'ROADS_PATHS_LINKS' -- Paths and links table ); -- 5. Use various SDO_NET functions and procedures. -- Validate the network. SELECT SDO_NET.VALIDATE_NETWORK('ROADS_NETWORK') FROM DUAL; -- Validate parts or aspects of the network. SELECT SDO_NET.VALIDATE_LINK_SCHEMA('ROADS_NETWORK') FROM DUAL; SELECT SDO_NET.VALIDATE_LRS_SCHEMA('ROADS_NETWORK') FROM DUAL; SELECT SDO_NET.VALIDATE_NODE_SCHEMA('ROADS_NETWORK') FROM DUAL; SELECT SDO_NET.VALIDATE_PATH_SCHEMA('ROADS_NETWORK') FROM DUAL; -- Retrieve various information (GET_xxx and some other functions). Network Data Model Overview 5-35 Network Examples (PL/SQL) SELECT SELECT SELECT SELECT SELECT SELECT SELECT SELECT SELECT SELECT SELECT SELECT SELECT SELECT SELECT SELECT SELECT SELECT SELECT SELECT SELECT SELECT SELECT SELECT SELECT SELECT SELECT SELECT SELECT SELECT SELECT SELECT SELECT SELECT SELECT SELECT SELECT SELECT SELECT SELECT SELECT SELECT SELECT SELECT SELECT SELECT SDO_NET.GET_CHILD_LINKS('ROADS_NETWORK', 101) FROM DUAL; SDO_NET.GET_CHILD_NODES('ROADS_NETWORK', 1) FROM DUAL; SDO_NET.GET_GEOMETRY_TYPE('ROADS_NETWORK') FROM DUAL; SDO_NET.GET_IN_LINKS('ROADS_NETWORK', 3) FROM DUAL; SDO_NET.GET_INVALID_LINKS('ROADS_NETWORK') FROM DUAL; SDO_NET.GET_INVALID_NODES('ROADS_NETWORK') FROM DUAL; SDO_NET.GET_INVALID_PATHS('ROADS_NETWORK') FROM DUAL; SDO_NET.GET_ISOLATED_NODES('ROADS_NETWORK') FROM DUAL; SDO_NET.GET_LINK_COST_COLUMN('ROADS_NETWORK') FROM DUAL; SDO_NET.GET_LINK_DIRECTION('ROADS_NETWORK') FROM DUAL; SDO_NET.GET_LINK_GEOM_COLUMN('ROADS_NETWORK') FROM DUAL; SDO_NET.GET_LINK_GEOMETRY('ROADS_NETWORK', 103) FROM DUAL; SDO_NET.GET_LINK_TABLE_NAME('ROADS_NETWORK') FROM DUAL; SDO_NET.GET_LRS_GEOM_COLUMN('ROADS_NETWORK') FROM DUAL; SDO_NET.GET_LRS_LINK_GEOMETRY('ROADS_NETWORK', 103) FROM DUAL; SDO_NET.GET_LRS_NODE_GEOMETRY('ROADS_NETWORK', 3) FROM DUAL; SDO_NET.GET_LRS_TABLE_NAME('ROADS_NETWORK') FROM DUAL; SDO_NET.GET_NETWORK_CATEGORY('ROADS_NETWORK') FROM DUAL; SDO_NET.GET_NETWORK_ID('ROADS_NETWORK') FROM DUAL; SDO_NET.GET_NETWORK_NAME(3) FROM DUAL; SDO_NET.GET_NETWORK_TYPE('ROADS_NETWORK') FROM DUAL; SDO_NET.GET_NO_OF_HIERARCHY_LEVELS('ROADS_NETWORK') FROM DUAL; SDO_NET.GET_NO_OF_LINKS('ROADS_NETWORK') FROM DUAL; SDO_NET.GET_NO_OF_NODES('ROADS_NETWORK') FROM DUAL; SDO_NET.GET_NO_OF_PARTITIONS('ROADS_NETWORK') FROM DUAL; SDO_NET.GET_NODE_DEGREE('ROADS_NETWORK', 3) FROM DUAL; SDO_NET.GET_NODE_GEOM_COLUMN('ROADS_NETWORK') FROM DUAL; SDO_NET.GET_NODE_GEOMETRY('ROADS_NETWORK', 3) FROM DUAL; SDO_NET.GET_NODE_IN_DEGREE('ROADS_NETWORK', 3) FROM DUAL; SDO_NET.GET_NODE_OUT_DEGREE('ROADS_NETWORK', 3) FROM DUAL; SDO_NET.GET_NODE_TABLE_NAME('ROADS_NETWORK') FROM DUAL; SDO_NET.GET_NODE_COST_COLUMN('ROADS_NETWORK') FROM DUAL; SDO_NET.GET_NODE_HIERARCHY_LEVEL('ROADS_NETWORK', 3) FROM DUAL; SDO_NET.GET_OUT_LINKS('ROADS_NETWORK', 3) FROM DUAL; SDO_NET.GET_PARTITION_TABLE_NAME('ROADS_NETWORK') FROM DUAL; SDO_NET.GET_PATH_GEOM_COLUMN('ROADS_NETWORK') FROM DUAL; SDO_NET.GET_PATH_TABLE_NAME('ROADS_NETWORK') FROM DUAL; SDO_NET.IS_COMPLEX('ROADS_NETWORK') FROM DUAL; SDO_NET.IS_HIERARCHICAL('ROADS_NETWORK') FROM DUAL; SDO_NET.IS_LOGICAL('ROADS_NETWORK') FROM DUAL; SDO_NET.IS_SIMPLE('ROADS_NETWORK') FROM DUAL; SDO_NET.IS_SPATIAL('ROADS_NETWORK') FROM DUAL; SDO_NET.LRS_GEOMETRY_NETWORK('ROADS_NETWORK') FROM DUAL; SDO_NET.NETWORK_EXISTS('ROADS_NETWORK') FROM DUAL; SDO_NET.SDO_GEOMETRY_NETWORK('ROADS_NETWORK') FROM DUAL; SDO_NET.TOPO_GEOMETRY_NETWORK('ROADS_NETWORK') FROM DUAL; -- Copy a network. EXECUTE SDO_NET.COPY_NETWORK('ROADS_NETWORK', 'ROADS_NETWORK2'); -- Create a trigger. EXECUTE SDO_NET.CREATE_DELETE_TRIGGER('ROADS_NETWORK'); -- 6. Use SDO_NET_MEM functions and procedures for analysis and editing. -- Network analysis and other operations (SDO_NET_MEM.NETWORK_MANAGER) DECLARE net_mem VARCHAR2(100); res_string VARCHAR2(1000); 5-36 Oracle Spatial Topology and Network Data Models Network Examples (PL/SQL) cost res_numeric res_array indx NUMBER; NUMBER; SDO_NUMBER_ARRAY; NUMBER; indx1 NUMBER; var1_numeric NUMBER; var1_array SDO_NUMBER_ARRAY; BEGIN net_mem := 'ROADS_NETWORK'; -- Read in the network. SDO_NET_MEM.NETWORK_MANAGER.READ_NETWORK(net_mem, 'TRUE'); -- Validate the network. res_string := SDO_NET_MEM.NETWORK_MANAGER.VALIDATE_NETWORK_SCHEMA(net_mem); DBMS_OUTPUT.PUT_LINE('Is network ' || net_mem || ' valid? ' || res_string); res_string := SDO_NET_MEM.NETWORK_MANAGER.LIST_NETWORKS; DBMS_OUTPUT.PUT_LINE('The current in-memory network(s) is/are: ' || res_string); res_numeric := SDO_NET_MEM.NETWORK_MANAGER.FIND_CONNECTED_COMPONENTS(net_mem); DBMS_OUTPUT.PUT_LINE('The number of connected components is: ' || res_numeric); res_array := SDO_NET_MEM.NETWORK_MANAGER.MCST_LINK(net_mem); DBMS_OUTPUT.PUT('Network ' || net_mem || ' has the following MCST links: '); FOR indx IN res_array.FIRST..res_array.LAST LOOP DBMS_OUTPUT.PUT(res_array(indx) || ' '); END LOOP; DBMS_OUTPUT.PUT_LINE(' '); res_array := SDO_NET_MEM.NETWORK_MANAGER.FIND_REACHABLE_NODES(net_mem,1); DBMS_OUTPUT.PUT_LINE('Reachable nodes from 1: '); FOR indx IN res_array.FIRST..res_array.LAST LOOP res_numeric := res_array(indx); DBMS_OUTPUT.PUT(res_numeric || ' '); END LOOP; DBMS_OUTPUT.PUT_LINE(' '); res_array := SDO_NET_MEM.NETWORK_MANAGER.NEAREST_NEIGHBORS(net_mem,6,3); DBMS_OUTPUT.PUT_LINE('Path IDs to the nearest 3 neighbors of node 6 are: '); FOR indx IN res_array.FIRST..res_array.LAST LOOP res_numeric := res_array(indx); DBMS_OUTPUT.PUT(res_numeric || ', which contains links: '); var1_array := SDO_NET_MEM.PATH.GET_LINK_IDS(net_mem, res_numeric); FOR indx1 IN var1_array.FIRST..var1_array.LAST LOOP var1_numeric := var1_array(indx1); DBMS_OUTPUT.PUT(var1_numeric || ' '); END LOOP; DBMS_OUTPUT.PUT_LINE(' '); END LOOP; DBMS_OUTPUT.PUT_LINE(' '); Network Data Model Overview 5-37 Network Examples (PL/SQL) res_array := SDO_NET_MEM.NETWORK_MANAGER.NEAREST_NEIGHBORS(net_mem,6,3); DBMS_OUTPUT.PUT_LINE('Path IDs to the nearest 3 neighbors of node 6 are: '); FOR indx IN res_array.FIRST..res_array.LAST LOOP res_numeric := res_array(indx); DBMS_OUTPUT.PUT(res_numeric || ', whose end node is: '); var1_numeric := SDO_NET_MEM.PATH.GET_END_NODE_ID(net_mem, res_numeric); DBMS_OUTPUT.PUT(var1_numeric); DBMS_OUTPUT.PUT_LINE(' '); END LOOP; DBMS_OUTPUT.PUT_LINE(' '); res_string := SDO_NET_MEM.NETWORK_MANAGER.IS_REACHABLE(net_mem,1,5); DBMS_OUTPUT.PUT_LINE('Can node 1 reach node 5? ' || res_string); res_array := SDO_NET_MEM.NETWORK_MANAGER.ALL_PATHS(net_mem,1,5,10,200,5); DBMS_OUTPUT.PUT_LINE('For each path from node 1 to node 5: '); FOR indx IN res_array.FIRST..res_array.LAST LOOP res_numeric := res_array(indx); DBMS_OUTPUT.PUT_LINE('Path ' || res_numeric || ' has the following properties: '); cost := SDO_NET_MEM.PATH.GET_COST(net_mem, res_numeric); DBMS_OUTPUT.PUT_LINE('Path ' || res_numeric || ' cost: ' || cost); res_string := SDO_NET_MEM.PATH.IS_CLOSED(net_mem, res_array(indx)); DBMS_OUTPUT.PUT_LINE('Is path ' || res_numeric || ' closed? ' || res_string); END LOOP; DBMS_OUTPUT.PUT_LINE(' '); res_numeric := SDO_NET_MEM.NETWORK_MANAGER.SHORTEST_PATH(net_mem,1,5); DBMS_OUTPUT.PUT_LINE('The shortest path from node 1 to node 5 is path ID: ' || res_numeric); DBMS_OUTPUT.PUT_LINE('The following are characteristics of this shortest path: '); cost := SDO_NET_MEM.PATH.GET_COST(net_mem, res_numeric); DBMS_OUTPUT.PUT_LINE('Path ' || res_numeric || ' has cost: ' || cost); res_string := SDO_NET_MEM.PATH.IS_CLOSED(net_mem, res_numeric); DBMS_OUTPUT.PUT_LINE('Is path ' || res_numeric || ' closed? ' || res_string); DBMS_OUTPUT.PUT_LINE(' '); res_numeric := SDO_NET_MEM.NETWORK_MANAGER.SHORTEST_PATH_DIJKSTRA(net_mem,1,5); DBMS_OUTPUT.PUT_LINE('The shortest Dijkstra path from node 1 to node 5 is ' || res_numeric); DBMS_OUTPUT.PUT_LINE('The following are characteristics of this shortest path: '); cost := SDO_NET_MEM.PATH.GET_COST(net_mem, res_numeric); DBMS_OUTPUT.PUT_LINE('Path ' || res_numeric || ' cost: ' || cost); res_string := SDO_NET_MEM.PATH.IS_CLOSED(net_mem, res_numeric); DBMS_OUTPUT.PUT_LINE('Is path ' || res_numeric || ' closed? ' || res_string); res_array := SDO_NET_MEM.PATH.GET_LINK_IDS(net_mem, res_numeric); DBMS_OUTPUT.PUT('Path ' || res_numeric || ' has links: '); FOR indx IN res_array.FIRST..res_array.LAST LOOP DBMS_OUTPUT.PUT(res_array(indx) || ' '); END LOOP; DBMS_OUTPUT.PUT_LINE(' '); res_array := SDO_NET_MEM.PATH.GET_NODE_IDS(net_mem, res_numeric); DBMS_OUTPUT.PUT('Path ' || res_numeric || ' has nodes: '); 5-38 Oracle Spatial Topology and Network Data Models Network Examples (PL/SQL) FOR indx IN res_array.FIRST..res_array.LAST LOOP DBMS_OUTPUT.PUT(res_array(indx) || ' '); END LOOP; DBMS_OUTPUT.PUT_LINE(' '); res_array := SDO_NET_MEM.NETWORK_MANAGER.WITHIN_COST(net_mem,2,20); DBMS_OUTPUT.PUT('Path IDs to nodes within cost of 40 from node 2: '); DBMS_OUTPUT.PUT_LINE(' '); FOR indx IN res_array.FIRST..res_array.LAST LOOP res_numeric := res_array(indx); DBMS_OUTPUT.PUT(res_numeric || ', whose end node is: '); var1_numeric := SDO_NET_MEM.PATH.GET_END_NODE_ID(net_mem, res_numeric); DBMS_OUTPUT.PUT(var1_numeric); DBMS_OUTPUT.PUT_LINE(' '); END LOOP; DBMS_OUTPUT.PUT_LINE(' '); END; / -- Link editing (SDO_NET_MEM.LINK) DECLARE net_mem res_string res_numeric res_geom res_array indx VARCHAR2(32); VARCHAR2(100); NUMBER; SDO_GEOMETRY; SDO_NUMBER_ARRAY; NUMBER; BEGIN net_mem := 'ROADS_NETWORK'; -- GET_COST res_numeric := SDO_NET_MEM.LINK.GET_COST(net_mem, 104); DBMS_OUTPUT.PUT_LINE('The cost of link 104 is: ' || res_numeric); -- GET_END_MEASURE res_numeric := SDO_NET_MEM.LINK.GET_END_MEASURE(net_mem, 104); DBMS_OUTPUT.PUT_LINE('The end measure of link 104 is: ' || res_numeric); -- GET_END_NODE_ID res_numeric := SDO_NET_MEM.LINK.GET_END_NODE_ID(net_mem, 104); DBMS_OUTPUT.PUT_LINE('The end node of link 104 is: ' || res_numeric); -- GET_GEOM_ID res_numeric := SDO_NET_MEM.LINK.GET_GEOM_ID(net_mem, 104); DBMS_OUTPUT.PUT_LINE('The geometry ID of link 104 is: ' || res_numeric); -- GET_GEOMETRY res_geom := SDO_NET_MEM.LINK.GET_GEOMETRY(net_mem, 104); -- GET_NAME res_string := SDO_NET_MEM.LINK.GET_NAME(net_mem, 104); DBMS_OUTPUT.PUT_LINE('The name of link 104 is: ' || res_string); -- GET_START_MEASURE Network Data Model Overview 5-39 Network Examples (PL/SQL) res_numeric := SDO_NET_MEM.LINK.GET_START_MEASURE(net_mem, 104); DBMS_OUTPUT.PUT_LINE('The start measure of link 104 is: ' || res_numeric); -- GET_START_NODE_ID res_numeric := SDO_NET_MEM.LINK.GET_START_NODE_ID(net_mem, 104); DBMS_OUTPUT.PUT_LINE('The start node of link 104 is: ' || res_numeric); -- GET_STATE res_string := SDO_NET_MEM.LINK.GET_STATE(net_mem, 104); DBMS_OUTPUT.PUT_LINE('The state of link 104 is: ' || res_string); -- IS_ACTIVE res_string := SDO_NET_MEM.LINK.IS_ACTIVE(net_mem, 104); DBMS_OUTPUT.PUT_LINE('Is link 104 active?: ' || res_string); -- IS_EXTERNAL_LINK res_string := SDO_NET_MEM.LINK.IS_EXTERNAL_LINK(net_mem, 104); DBMS_OUTPUT.PUT_LINE('Is link 104 an external link?: ' || res_string); -- IS_LOGICAL res_string := SDO_NET_MEM.LINK.IS_LOGICAL(net_mem, 104); DBMS_OUTPUT.PUT_LINE('Is link 104 a logical link?: ' || res_string); -- IS_TEMPORARY res_string := SDO_NET_MEM.LINK.IS_TEMPORARY(net_mem, 104); DBMS_OUTPUT.PUT_LINE('Is link 104 temporary?: ' || res_string); -- SET_COST -- Set the cost of link 302 to 6. SDO_NET_MEM.LINK.SET_COST(net_mem, 302, 6); -- SET_MEASURE -- Set the measure value of link 302 as from 111 to 114.16. SDO_NET_MEM.LINK.SET_MEASURE(net_mem, 302, 111, 114.16); -- SET_NAME -- Set the name of link 302 to 'My favorite link'. SDO_NET_MEM.LINK.SET_NAME(net_mem, 302, 'My favorite link'); -- SET_STATE -- Set the state of link 302 to 'INACTIVE'. SDO_NET_MEM.LINK.SET_STATE(net_mem, 302, 'INACTIVE'); -- GET_STATE res_string := SDO_NET_MEM.LINK.GET_STATE(net_mem, 302); DBMS_OUTPUT.PUT_LINE('The state of link 302 is: ' || res_string); -- SET_TYPE -- Set the type of link 302 to 'Normal street'. SDO_NET_MEM.LINK.SET_TYPE(net_mem, 302, 'Normal street'); -- GET_TYPE res_string := SDO_NET_MEM.LINK.GET_TYPE(net_mem, 302); DBMS_OUTPUT.PUT_LINE('The type of link 302 is: ' || res_string); END; / -- Node editing (SDO_NET_MEM.NODE) DECLARE net_mem VARCHAR2(32); 5-40 Oracle Spatial Topology and Network Data Models Network Examples (PL/SQL) res_string res_numeric res_geom res_array indx VARCHAR2(100); NUMBER; SDO_GEOMETRY; SDO_NUMBER_ARRAY; NUMBER; BEGIN net_mem := 'ROADS_NETWORK'; -- GET_COMPONENT_NO res_numeric := SDO_NET_MEM.NODE.GET_COMPONENT_NO(net_mem, 3); DBMS_OUTPUT.PUT_LINE('The component number of node 3 is: ' || res_numeric); -- GET_COST res_numeric := SDO_NET_MEM.NODE.GET_COST(net_mem, 3); DBMS_OUTPUT.PUT_LINE('The cost of node 3 is: ' || res_numeric); -- GET_EXTERNAL_NETWORK_ID res_numeric := SDO_NET_MEM.NODE.GET_EXTERNAL_NETWORK_ID(net_mem, 3); DBMS_OUTPUT.PUT_LINE('The external network ID of node 3 is: ' || res_numeric); -- GET_EXTERNAL_NETWORK_NAME res_string := SDO_NET_MEM.NODE.GET_EXTERNAL_NETWORK_NAME(net_mem, 3); DBMS_OUTPUT.PUT_LINE('The external network name of node 3 is: ' || res_numeric); -- GET_EXTERNAL_NODE_ID res_numeric := SDO_NET_MEM.NODE.GET_EXTERNAL_NODE_ID(net_mem, 3); DBMS_OUTPUT.PUT_LINE('The external node ID of node 3 is: ' || res_numeric); -- GET_GEOM_ID res_numeric := SDO_NET_MEM.NODE.GET_GEOM_ID(net_mem, 3); DBMS_OUTPUT.PUT_LINE('The geometry ID of node 3 is: ' || res_numeric); -- GET_GEOMETRY res_geom := SDO_NET_MEM.NODE.GET_GEOMETRY(net_mem, 3); -- GET_IN_LINK_IDS res_array := SDO_NET_MEM.NODE.GET_IN_LINK_IDS(net_mem, 3); DBMS_OUTPUT.PUT('Node 3 has the following inbound links: '); FOR indx IN res_array.FIRST..res_array.LAST LOOP DBMS_OUTPUT.PUT(res_array(indx) || ' '); END LOOP; DBMS_OUTPUT.PUT_LINE(' '); -- GET_INCIDENT_LINK_IDS res_array := SDO_NET_MEM.NODE.GET_INCIDENT_LINK_IDS(net_mem, 3); DBMS_OUTPUT.PUT('Node 3 has the following incident links: '); FOR indx IN res_array.FIRST..res_array.LAST LOOP DBMS_OUTPUT.PUT(res_array(indx) || ' '); END LOOP; DBMS_OUTPUT.PUT_LINE(' '); -- GET_MEASURE res_numeric := SDO_NET_MEM.NODE.GET_MEASURE(net_mem, 3); DBMS_OUTPUT.PUT_LINE('The measure value of node 3 is: ' || res_numeric); -- GET_NAME Network Data Model Overview 5-41 Network Examples (PL/SQL) res_string := SDO_NET_MEM.NODE.GET_NAME(net_mem, 3); DBMS_OUTPUT.PUT_LINE('The name of node 3 is: ' || res_string); -- GET_OUT_LINK_IDS res_array := SDO_NET_MEM.NODE.GET_OUT_LINK_IDS(net_mem, 3); DBMS_OUTPUT.PUT('Node 3 has the following outbound links: '); FOR indx IN res_array.FIRST..res_array.LAST LOOP DBMS_OUTPUT.PUT(res_array(indx) || ' '); END LOOP; DBMS_OUTPUT.PUT_LINE(' '); -- GET_PARTITION_ID res_numeric := SDO_NET_MEM.NODE.GET_PARTITION_ID(net_mem, 3); DBMS_OUTPUT.PUT_LINE('The partition for node 3 is: ' || res_numeric); -- GET_STATE res_string := SDO_NET_MEM.NODE.GET_STATE(net_mem, 3); DBMS_OUTPUT.PUT_LINE('The state of node 3 is: ' || res_string); -- IS_ACTIVE res_string := SDO_NET_MEM.NODE.IS_ACTIVE(net_mem, 3); DBMS_OUTPUT.PUT_LINE('Is node 3 active?: ' || res_string); -- IS_EXTERNAL_NODE res_string := SDO_NET_MEM.NODE.IS_EXTERNAL_NODE(net_mem, 3); DBMS_OUTPUT.PUT_LINE('Is node 3 an external node?: ' || res_string); -- IS_LOGICAL res_string := SDO_NET_MEM.NODE.IS_LOGICAL(net_mem, 3); DBMS_OUTPUT.PUT_LINE('Is node 3 a logical node?: ' || res_string); -- IS_TEMPORARY res_string := SDO_NET_MEM.NODE.IS_TEMPORARY(net_mem, 3); DBMS_OUTPUT.PUT_LINE('Is node 3 temporary?: ' || res_string); -- LINK_EXISTS res_string := SDO_NET_MEM.NODE.LINK_EXISTS(net_mem, 3, 4); DBMS_OUTPUT.PUT_LINE('Does a link exist between nodes 3 and 4?: ' || res_string); -- MAKE_TEMPORARY -- Make node 7 temporary. SDO_NET_MEM.NODE.MAKE_TEMPORARY(net_mem, 7); -- SET_COMPONENT_NO -- Set the component number of node 7 to 987. SDO_NET_MEM.NODE.SET_COMPONENT_NO(net_mem, 7, 987); -- SET_COST -- Set the cost of node 7 to 40. SDO_NET_MEM.NODE.SET_COST(net_mem, 7, 40); -- SET_EXTERNAL_NETWORK_ID -- Set the external network ID of node 7 to 1000. SDO_NET_MEM.NODE.SET_EXTERNAL_NETWORK_ID(net_mem, 7, 1000); -- SET_EXTERNAL_NODE_ID -- Set the external node ID of node 7 to 1014. SDO_NET_MEM.NODE.SET_EXTERNAL_NODE_ID(net_mem, 7, 1014); 5-42 Oracle Spatial Topology and Network Data Models Network Examples (PL/SQL) -- SET_GEOM_ID -- Set the geometry ID of node 7 to 99. SDO_NET_MEM.NODE.SET_GEOM_ID(net_mem, 7, 99); -- SET_MEASURE -- Set the measure value of node 7 to 30. SDO_NET_MEM.NODE.SET_MEASURE(net_mem, 7, 30); -- SET_NAME -- Set the name of node 7 to 'My favorite node'. SDO_NET_MEM.NODE.SET_NAME(net_mem, 7, 'My favorite node'); -- GET_NAME res_string := SDO_NET_MEM.NODE.GET_NAME(net_mem, 7); DBMS_OUTPUT.PUT_LINE('The name of node 7 is: ' || res_string); -- SET_STATE -- Set the state of node 7 to 'INACTIVE'. SDO_NET_MEM.NODE.SET_STATE(net_mem, 7, 'INACTIVE'); -- GET_STATE res_string := SDO_NET_MEM.NODE.GET_STATE(net_mem, 7); DBMS_OUTPUT.PUT_LINE('The state of node 7 is: ' || res_string); -- SET_TYPE -- Set the type of node 7 to 'Historic site'. SDO_NET_MEM.NODE.SET_TYPE(net_mem, 7, 'Historic site'); -- GET_TYPE res_string := SDO_NET_MEM.NODE.GET_TYPE(net_mem, 7); DBMS_OUTPUT.PUT_LINE('The type of node 7 is: ' || res_string); END; / -- Path editing (SDO_NET_MEM.PATH) DECLARE net_mem res_string res_numeric res_geom path_id res_array indx VARCHAR2(32); VARCHAR2(100); NUMBER; SDO_GEOMETRY; NUMBER; SDO_NUMBER_ARRAY; NUMBER; BEGIN net_mem := 'ROADS_NETWORK'; -- Create a path for use with subsequent statements. Here, it is -- the shortest path between nodes 1 (N1) and 5 (N5). path_id := SDO_NET_MEM.NETWORK_MANAGER.SHORTEST_PATH(net_mem,1,5); DBMS_OUTPUT.PUT_LINE('The shortest path between nodes 1 and 5 is: ' || path_id); -- GET_LINK_IDS res_array := SDO_NET_MEM.PATH.GET_LINK_IDS(net_mem, path_id); DBMS_OUTPUT.PUT_LINE('Path ' || path_id || ' has the following links: '); FOR indx IN res_array.FIRST..res_array.LAST LOOP DBMS_OUTPUT.PUT(res_array(indx) || ' '); END LOOP; DBMS_OUTPUT.PUT_LINE(' '); Network Data Model Overview 5-43 Network Examples (PL/SQL) -- GET_COST res_numeric := SDO_NET_MEM.PATH.GET_COST(net_mem, path_id); DBMS_OUTPUT.PUT_LINE('The cost of path ' || path_id || ' is: ' || res_numeric); -- GET_END_NODE_ID res_numeric := SDO_NET_MEM.PATH.GET_END_NODE_ID(net_mem, path_id); DBMS_OUTPUT.PUT_LINE('The end node ID of path ' || path_id || ' is: ' || res_ numeric); -- GET_GEOMETRY res_geom := SDO_NET_MEM.PATH.GET_GEOMETRY(net_mem, path_id); -- doesn't work DBMS_OUTPUT.PUT_LINE('The geometry of path ' || path_id || ' is: ' || res_geom); -- GET_LINK_IDS res_array := SDO_NET_MEM.PATH.GET_LINK_IDS(net_mem, path_id); DBMS_OUTPUT.PUT_LINE('Path ' || path_id || ' has the following links: '); FOR indx IN res_array.FIRST..res_array.LAST LOOP DBMS_OUTPUT.PUT(res_array(indx) || ' '); END LOOP; DBMS_OUTPUT.PUT_LINE(' '); -- GET_NAME res_string := SDO_NET_MEM.PATH.GET_NAME(net_mem, path_id); DBMS_OUTPUT.PUT_LINE('The name of path ' || path_id || ' is: ' || res_string); -- GET_NO_OF_LINKS res_numeric := SDO_NET_MEM.PATH.GET_NO_OF_LINKS(net_mem, path_id); DBMS_OUTPUT.PUT_LINE('The number of links in path ' || path_id || ' is: ' || res_ numeric); -- GET_NODE_IDS res_array := SDO_NET_MEM.PATH.GET_NODE_IDS(net_mem, path_id); DBMS_OUTPUT.PUT('Path ' || path_id || ' has the following nodes: '); FOR indx IN res_array.FIRST..res_array.LAST LOOP DBMS_OUTPUT.PUT(res_array(indx) || ' '); END LOOP; DBMS_OUTPUT.PUT_LINE(' '); -- GET_START_NODE_ID res_numeric := SDO_NET_MEM.PATH.GET_START_NODE_ID(net_mem, path_id); DBMS_OUTPUT.PUT_LINE('The start node ID of path ' || path_id || ' is: ' || res_ numeric); -- IS_ACTIVE res_string := SDO_NET_MEM.PATH.IS_ACTIVE(net_mem, path_id); DBMS_OUTPUT.PUT_LINE('Is path ' || path_id || ' active?: ' || res_string); -- IS_CLOSED res_string := SDO_NET_MEM.PATH.IS_CLOSED(net_mem, path_id); DBMS_OUTPUT.PUT_LINE('Is path ' || path_id || ' closed?: ' || res_string); -- IS_CONNECTED res_string := SDO_NET_MEM.PATH.IS_CONNECTED(net_mem, path_id); DBMS_OUTPUT.PUT_LINE('Is path ' || path_id || ' connected?: ' || res_string); -- IS_LOGICAL 5-44 Oracle Spatial Topology and Network Data Models Network Examples (PL/SQL) res_string := SDO_NET_MEM.PATH.IS_LOGICAL(net_mem, path_id); DBMS_OUTPUT.PUT_LINE('Is path ' || path_id || ' a logical path?: ' || res_string); -- IS_SIMPLE res_string := SDO_NET_MEM.PATH.IS_SIMPLE(net_mem, path_id); DBMS_OUTPUT.PUT_LINE('Is path ' || path_id || ' a simple path?: ' || res_string); -- IS_TEMPORARY res_string := SDO_NET_MEM.PATH.IS_TEMPORARY(net_mem, path_id); DBMS_OUTPUT.PUT_LINE('Is path ' || path_id || ' temporary?: ' || res_string); -- SET_NAME -- Set the name of path to 'My favorite path'. SDO_NET_MEM.PATH.SET_NAME(net_mem, path_id, 'My favorite path'); -- GET_NAME res_string := SDO_NET_MEM.PATH.GET_NAME(net_mem, path_id); DBMS_OUTPUT.PUT_LINE('The name of path ' || path_id || ' is: ' || res_string); -- SET_TYPE -- Set the type of the path to 'Scenic'. SDO_NET_MEM.PATH.SET_TYPE(net_mem, path_id, 'Scenic'); -- GET_TYPE res_string := SDO_NET_MEM.PATH.GET_TYPE(net_mem, path_id); DBMS_OUTPUT.PUT_LINE('The type of path ' || path_id || ' is: ' || res_string); -- SET_PATH_ID -- Set (change) the path ID of the path to 6789. SDO_NET_MEM.PATH.SET_PATH_ID(net_mem, path_id, 6789); END; / 5.11.4 Logical Hierarchical Network Example This section presents an example of a logical network that contains the nodes and links illustrated in Figure 5–7. Because it is a logical network, there are no spatial geometries associated with it. (Figure 5–7 is essentially the same as Figure 5–2 in Section 5.5, but with the nodes and links labeled.) Network Data Model Overview 5-45 Network Examples (PL/SQL) Figure 5–7 Nodes and Links for Logical Network Example Level 2 HN1HN2 HN1 HN2 Level 1 N2 N1N2 N1 N2N3 N8 N5N8 N7N8 N3 N4N5 N5 N1N3 N3N4 N5N6 N4 N4N6 N6 N8N9 N9 N7 N7N9 N6N7 N10N11 N11 N10 N9N10 N11N12 N9N13 N12N13 N12 N13 N12N14 N13N14 N14 As shown in Figure 5–7: ■ ■ ■ The network is hierarchical, with two levels. The top level (level 2) consists of two nodes (HN1 and HN2) and one link (HN1HN2) that links these nodes. The remaining nodes and links are in the bottom level (level 1) of the hierarchy. Each node in level 1 is a child node of one of the nodes in level 2. Node HN1 has the following child nodes: N1, N2, N3, N4, N5, and N6. Node HN2 has the following child nodes: N7, N8, N9, N10, N11, N12, N13, and N14. Two links (N5N8 and N6N7) in level 1 are child links of the link HN1HN2 in level 2. Example 5–5 does the following: ■ Creates and populates the node table. ■ Creates and populates the link table. ■ Creates and populates the path table and path-link table, for possible future use. (Before an application can use paths, you must populate these two tables.) ■ Inserts network metadata into the USER_SDO_NETWORK_METADATA view. ■ Uses various SDO_NET functions and procedures. ■ Uses SDO_NET_MEM functions and procedures for analysis and editing. Example 5–5 Logical Network Example (PL/SQL) ---------- Basic steps: 1. Create and populate the node table. 2. Create and populate the link table. 3. Create the path table and paths and links table (for possible future use, before which they will need to be populated). 4. Populate the network metadata (USER_SDO_NETWORK_METADATA). Note: Can be done before or after Steps 1-3. 5. Use various SDO_NET functions and procedures. 6. Use SDO_NET_MEM functions and procedures for analysis and editing. -- 1. Create and populate the node table. EXECUTE SDO_NET.CREATE_NODE_TABLE('XYZ_NODES', NULL, NULL, NULL, 2); 5-46 Oracle Spatial Topology and Network Data Models Network Examples (PL/SQL) -- Populate the node table, starting with the highest level in the hierarchy. -- HN1 (Hierarchy level=2, highest in this network) INSERT INTO xyz_nodes (node_id, node_name, active, hierarchy_level) VALUES (1, 'HN1', 'Y', 2); -- HN2 (Hierarchy level=2, highest in this network) INSERT INTO xyz_nodes (node_id, node_name, active, hierarchy_level) VALUES (2, 'HN2', 'Y', 2); -- N1 (Hierarchy level 1, parent node ID = 1 for N1 through N6) INSERT INTO xyz_nodes (node_id, node_name, active, hierarchy_level, parent_node_id) VALUES (101, 'N1', 'Y', 1, 1); -- N2 INSERT INTO xyz_nodes (node_id, node_name, active, hierarchy_level, parent_node_id) VALUES (102, 'N2', 'Y', 1, 1); -- N3 INSERT INTO xyz_nodes (node_id, node_name, active, hierarchy_level, parent_node_id) VALUES (103, 'N3', 'Y', 1, 1); -- N4 INSERT INTO xyz_nodes (node_id, node_name, active, hierarchy_level, parent_node_id) VALUES (104, 'N4', 'Y', 1, 1); -- N5 INSERT INTO xyz_nodes (node_id, node_name, active, hierarchy_level, parent_node_id) VALUES (105, 'N5', 'Y', 1, 1); -- N6 INSERT INTO xyz_nodes (node_id, node_name, active, hierarchy_level, parent_node_id) VALUES (106, 'N6', 'Y', 1, 1); -- N7 (Hierarchy level 1, parent node ID = 2 for N7 through N14) INSERT INTO xyz_nodes (node_id, node_name, active, hierarchy_level, parent_node_id) VALUES (107, 'N7', 'Y', 1, 2); -- N8 INSERT INTO xyz_nodes (node_id, node_name, active, hierarchy_level, parent_node_id) VALUES (108, 'N8', 'Y', 1, 2); -- N9 INSERT INTO xyz_nodes (node_id, node_name, active, hierarchy_level, parent_node_id) VALUES (109, 'N9', 'Y', 1, 2); -- N10 INSERT INTO xyz_nodes (node_id, node_name, active, hierarchy_level, parent_node_id) VALUES (110, 'N10', 'Y', 1, 2); Network Data Model Overview 5-47 Network Examples (PL/SQL) -- N11 INSERT INTO xyz_nodes (node_id, node_name, active, hierarchy_level, parent_node_id) VALUES (111, 'N11', 'Y', 1, 2); -- N12 INSERT INTO xyz_nodes (node_id, node_name, active, hierarchy_level, parent_node_id) VALUES (112, 'N12', 'Y', 1, 2); -- N13 INSERT INTO xyz_nodes (node_id, node_name, active, hierarchy_level, parent_node_id) VALUES (113, 'N13', 'Y', 1, 2); -- N14 INSERT INTO xyz_nodes (node_id, node_name, active, hierarchy_level, parent_node_id) VALUES (114, 'N14', 'Y', 1, 2); -- 2. Create and populate the link table. EXECUTE SDO_NET.CREATE_LINK_TABLE('XYZ_LINKS', NULL, NULL, 'COST', 2); -- Populate the link table. -- HN1HN2 (single link in highest hierarchy level: link level = 2) INSERT INTO xyz_links (link_id, link_name, start_node_id, end_node_id, active, link_level) VALUES (1001, 'HN1HN2', 1, 2, 'Y', 2); -- For remaining links, link level = 1 and cost (10, 20, or 30) varies among links. -- N1N2 INSERT INTO xyz_links (link_id, link_name, start_node_id, end_node_id, active, link_level, cost) VALUES (1101, 'N1N2', 101, 102, 'Y', 1, 10); -- N1N3 INSERT INTO xyz_links (link_id, link_name, start_node_id, end_node_id, active, link_level, cost) VALUES (1102, 'N1N3', 101, 103, 'Y', 1, 20); -- N2N3 INSERT INTO xyz_links (link_id, link_name, start_node_id, end_node_id, active, link_level, cost) VALUES (1103, 'N2N3', 102, 103, 'Y', 1, 30); -- N3N4 INSERT INTO xyz_links (link_id, link_name, start_node_id, end_node_id, active, link_level, cost) VALUES (1104, 'N3N4', 103, 104, 'Y', 1, 10); -- N4N5 INSERT INTO xyz_links (link_id, link_name, start_node_id, end_node_id, active, link_level, cost) VALUES (1105, 'N4N5', 104, 105, 'Y', 1, 20); -- N4N6 INSERT INTO xyz_links (link_id, link_name, start_node_id, end_node_id, active, link_level, cost) 5-48 Oracle Spatial Topology and Network Data Models Network Examples (PL/SQL) VALUES (1106, 'N4N6', 104, 106, 'Y', 1, 30); -- N5N6 INSERT INTO xyz_links (link_id, link_name, start_node_id, end_node_id, active, link_level, cost) VALUES (1107, 'N5N6', 105, 106, 'Y', 1, 10); -- N5N8 (child of the higher-level link: parent ID = 1001) INSERT INTO xyz_links (link_id, link_name, start_node_id, end_node_id, active, link_level, cost, parent_link_id) VALUES (1108, 'N5N8', 105, 108, 'Y', 1, 20, 1001); -- N6N7 (child of the higher-level link: parent ID = 1001) INSERT INTO xyz_links (link_id, link_name, start_node_id, end_node_id, active, link_level, cost, parent_link_id) VALUES (1109, 'N6N7', 106, 107, 'Y', 1, 30, 1001); -- N7N8 INSERT INTO xyz_links (link_id, link_name, start_node_id, end_node_id, active, link_level, cost) VALUES (1110, 'N7N8', 107, 108, 'Y', 1, 10); -- N7N9 INSERT INTO xyz_links (link_id, link_name, start_node_id, end_node_id, active, link_level, cost) VALUES (1111, 'N7N9', 107, 109, 'Y', 1, 20); -- N8N9 INSERT INTO xyz_links (link_id, link_name, start_node_id, end_node_id, active, link_level, cost) VALUES (1112, 'N8N9', 108, 109, 'Y', 1, 30); -- N9N10 INSERT INTO xyz_links (link_id, link_name, start_node_id, end_node_id, active, link_level, cost) VALUES (1113, 'N9N10', 109, 110, 'Y', 1, 30); -- N9N13 INSERT INTO xyz_links (link_id, link_name, start_node_id, end_node_id, active, link_level, cost) VALUES (1114, 'N9N13', 109, 113, 'Y', 1, 10); -- N10N11 INSERT INTO xyz_links (link_id, link_name, start_node_id, end_node_id, active, link_level, cost) VALUES (1115, 'N10N11', 110, 111, 'Y', 1, 20); -- N11N12 INSERT INTO xyz_links (link_id, link_name, start_node_id, end_node_id, active, link_level, cost) VALUES (1116, 'N11N12', 111, 112, 'Y', 1, 30); -- N12N13 INSERT INTO xyz_links (link_id, link_name, start_node_id, end_node_id, active, link_level, cost) VALUES (1117, 'N12N13', 112, 113, 'Y', 1, 10); -- N12N14 INSERT INTO xyz_links (link_id, link_name, start_node_id, end_node_id, active, link_level, cost) Network Data Model Overview 5-49 Network Examples (PL/SQL) VALUES (1118, 'N12N14', 112, 114, 'Y', 1, 20); -- N13N14 INSERT INTO xyz_links (link_id, link_name, start_node_id, end_node_id, active, link_level, cost) VALUES (1119, 'N13N14', 113, 114, 'Y', 1, 30); -- 3. Create the path table (to store created paths) and the path-link -table (to store links for each path) for possible future use, -before which they will need to be populated. EXECUTE SDO_NET.CREATE_PATH_TABLE('XYZ_PATHS', NULL); EXECUTE SDO_NET.CREATE_PATH_LINK_TABLE('XYZ_PATHS_LINKS'); -- 4. Populate the network metadata (USER_SDO_NETWORK_METADATA). INSERT INTO user_sdo_network_metadata (NETWORK, NETWORK_CATEGORY, NO_OF_HIERARCHY_LEVELS, NO_OF_PARTITIONS, NODE_TABLE_NAME, LINK_TABLE_NAME, LINK_DIRECTION, LINK_COST_COLUMN, PATH_TABLE_NAME, PATH_LINK_TABLE_NAME) VALUES ( 'XYZ_NETWORK', -- Network name 'LOGICAL', -- Network category 2, -- No. of levels in hierarchy 1, -- No. of partitions 'XYZ_NODES', -- Node table name 'XYZ_LINKS', -- Link table name 'BIDIRECTED', -- Link direction 'COST', -- Link cost column 'XYZ_PATHS', -- Path table name 'XYZ_PATHS_LINKS' -- Path-link table name ); -- 5. Use various SDO_NET functions and procedures. -- Validate the network. SELECT SDO_NET.VALIDATE_NETWORK('XYZ_NETWORK') FROM DUAL; -- Validate parts or aspects of the network. SELECT SDO_NET.VALIDATE_LINK_SCHEMA('XYZ_NETWORK') FROM DUAL; SELECT SDO_NET.VALIDATE_LRS_SCHEMA('XYZ_NETWORK') FROM DUAL; SELECT SDO_NET.VALIDATE_NODE_SCHEMA('XYZ_NETWORK') FROM DUAL; SELECT SDO_NET.VALIDATE_PATH_SCHEMA('XYZ_NETWORK') FROM DUAL; -- Retrieve various information (GET_xxx and some other functions). SELECT SDO_NET.GET_CHILD_LINKS('XYZ_NETWORK', 1001) FROM DUAL; SELECT SDO_NET.GET_CHILD_NODES('XYZ_NETWORK', 1) FROM DUAL; SELECT SDO_NET.GET_CHILD_NODES('XYZ_NETWORK', 2) FROM DUAL; SELECT SDO_NET.GET_IN_LINKS('XYZ_NETWORK', 104) FROM DUAL; SELECT SDO_NET.GET_LINK_COST_COLUMN('XYZ_NETWORK') FROM DUAL; SELECT SDO_NET.GET_LINK_DIRECTION('XYZ_NETWORK') FROM DUAL; SELECT SDO_NET.GET_LINK_TABLE_NAME('XYZ_NETWORK') FROM DUAL; SELECT SDO_NET.GET_NETWORK_TYPE('XYZ_NETWORK') FROM DUAL; SELECT SDO_NET.GET_NO_OF_HIERARCHY_LEVELS('XYZ_NETWORK') FROM DUAL; 5-50 Oracle Spatial Topology and Network Data Models Network Examples (PL/SQL) SELECT SELECT SELECT SELECT SELECT SELECT SELECT SELECT SELECT SELECT SELECT SELECT SDO_NET.GET_NO_OF_LINKS('XYZ_NETWORK') FROM DUAL; SDO_NET.GET_NO_OF_NODES('XYZ_NETWORK') FROM DUAL; SDO_NET.GET_NO_OF_PARTITIONS('XYZ_NETWORK') FROM DUAL; SDO_NET.GET_NODE_DEGREE('XYZ_NETWORK', 104) FROM DUAL; SDO_NET.GET_NODE_IN_DEGREE('XYZ_NETWORK', 104) FROM DUAL; SDO_NET.GET_NODE_OUT_DEGREE('XYZ_NETWORK', 104) FROM DUAL; SDO_NET.GET_OUT_LINKS('XYZ_NETWORK', 104) FROM DUAL; SDO_NET.GET_PATH_TABLE_NAME('XYZ_NETWORK') FROM DUAL; SDO_NET.IS_HIERARCHICAL('XYZ_NETWORK') FROM DUAL; SDO_NET.IS_LOGICAL('XYZ_NETWORK') FROM DUAL; SDO_NET.IS_SPATIAL('XYZ_NETWORK') FROM DUAL; SDO_NET.NETWORK_EXISTS('XYZ_NETWORK') FROM DUAL; -- Copy a network. EXECUTE SDO_NET.COPY_NETWORK('XYZ_NETWORK', 'XYZ_NETWORK2'); -- Create a trigger. EXECUTE SDO_NET.CREATE_DELETE_TRIGGER('XYZ_NETWORK'); -- 6. Use SDO_NET_MEM functions and procedures for analysis and editing. -- Network analysis and other operations (SDO_NET_MEM.NETWORK_MANAGER) DECLARE net_mem VARCHAR2(100); res_string VARCHAR2(1000); cost res_numeric res_array indx NUMBER; NUMBER; SDO_NUMBER_ARRAY; NUMBER; indx1 NUMBER; var1_numeric NUMBER; var1_array SDO_NUMBER_ARRAY; BEGIN net_mem := 'XYZ_NETWORK'; -- Read in the network. SDO_NET_MEM.NETWORK_MANAGER.READ_NETWORK(net_mem, 'TRUE'); -- Validate the network. res_string := SDO_NET_MEM.NETWORK_MANAGER.VALIDATE_NETWORK_SCHEMA(net_mem); DBMS_OUTPUT.PUT_LINE('Is network ' || net_mem || ' valid? ' || res_string); res_string := SDO_NET_MEM.NETWORK_MANAGER.LIST_NETWORKS; DBMS_OUTPUT.PUT_LINE('The current in-memory network(s) is/are: ' || res_string); res_numeric := SDO_NET_MEM.NETWORK_MANAGER.FIND_CONNECTED_COMPONENTS(net_mem); DBMS_OUTPUT.PUT_LINE('The number of connected components is: ' || res_numeric); res_array := SDO_NET_MEM.NETWORK_MANAGER.MCST_LINK(net_mem); DBMS_OUTPUT.PUT('Network ' || net_mem || ' has the following MCST links: '); FOR indx IN res_array.FIRST..res_array.LAST LOOP DBMS_OUTPUT.PUT(res_array(indx) || ' '); END LOOP; DBMS_OUTPUT.PUT_LINE(' '); Network Data Model Overview 5-51 Network Examples (PL/SQL) res_array := SDO_NET_MEM.NETWORK_MANAGER.FIND_REACHABLE_NODES(net_mem,101); DBMS_OUTPUT.PUT_LINE('Reachable nodes from 101: '); FOR indx IN res_array.FIRST..res_array.LAST LOOP res_numeric := res_array(indx); DBMS_OUTPUT.PUT(res_numeric || ' '); END LOOP; DBMS_OUTPUT.PUT_LINE(' '); res_array := SDO_NET_MEM.NETWORK_MANAGER.FIND_REACHING_NODES(net_mem,101); DBMS_OUTPUT.PUT_LINE('Nodes from which 101 can be reached: '); FOR indx IN res_array.FIRST..res_array.LAST LOOP res_numeric := res_array(indx); DBMS_OUTPUT.PUT(res_numeric || ' '); END LOOP; DBMS_OUTPUT.PUT_LINE(' '); res_array := SDO_NET_MEM.NETWORK_MANAGER.NEAREST_NEIGHBORS(net_mem,101,3); DBMS_OUTPUT.PUT_LINE('Path IDs to the nearest 3 neighbors of node 101 are: '); FOR indx IN res_array.FIRST..res_array.LAST LOOP res_numeric := res_array(indx); DBMS_OUTPUT.PUT(res_numeric || ', which contains links: '); var1_array := SDO_NET_MEM.PATH.GET_LINK_IDS(net_mem, res_numeric); FOR indx1 IN var1_array.FIRST..var1_array.LAST LOOP var1_numeric := var1_array(indx1); DBMS_OUTPUT.PUT(var1_numeric || ' '); END LOOP; DBMS_OUTPUT.PUT_LINE(' '); END LOOP; DBMS_OUTPUT.PUT_LINE(' '); res_array := SDO_NET_MEM.NETWORK_MANAGER.NEAREST_NEIGHBORS(net_mem,101,3); DBMS_OUTPUT.PUT_LINE('Path IDs to the nearest 3 neighbors of node 101 are: '); FOR indx IN res_array.FIRST..res_array.LAST LOOP res_numeric := res_array(indx); DBMS_OUTPUT.PUT(res_numeric || ', whose end node is: '); var1_numeric := SDO_NET_MEM.PATH.GET_END_NODE_ID(net_mem, res_numeric); DBMS_OUTPUT.PUT(var1_numeric); DBMS_OUTPUT.PUT_LINE(' '); END LOOP; DBMS_OUTPUT.PUT_LINE(' '); res_string := SDO_NET_MEM.NETWORK_MANAGER.IS_REACHABLE(net_mem,101,105); DBMS_OUTPUT.PUT_LINE('Can node 101 reach node 105? ' || res_string); res_array := SDO_NET_MEM.NETWORK_MANAGER.ALL_PATHS(net_mem,101,105,10,200,5); DBMS_OUTPUT.PUT_LINE('For each path from node 101 to node 105: '); FOR indx IN res_array.FIRST..res_array.LAST LOOP res_numeric := res_array(indx); DBMS_OUTPUT.PUT_LINE('Path ' || res_numeric || ' has the following properties: '); cost := SDO_NET_MEM.PATH.GET_COST(net_mem, res_numeric); DBMS_OUTPUT.PUT_LINE('Path ' || res_numeric || ' cost: ' || cost); res_string := SDO_NET_MEM.PATH.IS_CLOSED(net_mem, res_array(indx)); 5-52 Oracle Spatial Topology and Network Data Models Network Examples (PL/SQL) DBMS_OUTPUT.PUT_LINE('Is path ' || res_numeric || ' closed? ' || res_string); END LOOP; DBMS_OUTPUT.PUT_LINE(' '); res_numeric := SDO_NET_MEM.NETWORK_MANAGER.SHORTEST_PATH(net_mem,101,105); DBMS_OUTPUT.PUT_LINE('The shortest path from node 101 to node 105 is path ID: ' || res_numeric); DBMS_OUTPUT.PUT_LINE('The following are characteristics of this shortest path: '); cost := SDO_NET_MEM.PATH.GET_COST(net_mem, res_numeric); DBMS_OUTPUT.PUT_LINE('Path ' || res_numeric || ' has cost: ' || cost); res_string := SDO_NET_MEM.PATH.IS_CLOSED(net_mem, res_numeric); DBMS_OUTPUT.PUT_LINE('Is path ' || res_numeric || ' closed? ' || res_string); res_array := SDO_NET_MEM.PATH.GET_LINK_IDS(net_mem, res_numeric); DBMS_OUTPUT.PUT('Path ' || res_numeric || ' has links: '); FOR indx IN res_array.FIRST..res_array.LAST LOOP DBMS_OUTPUT.PUT(res_array(indx) || ' '); END LOOP; DBMS_OUTPUT.PUT_LINE(' '); DBMS_OUTPUT.PUT_LINE(' '); res_numeric := SDO_NET_MEM.NETWORK_MANAGER.SHORTEST_PATH_DIJKSTRA(net_ mem,101,105); DBMS_OUTPUT.PUT_LINE('The shortest Dijkstra path from node 101 to node 105 is ' || res_numeric); DBMS_OUTPUT.PUT_LINE('The following are characteristics of this shortest path: '); cost := SDO_NET_MEM.PATH.GET_COST(net_mem, res_numeric); DBMS_OUTPUT.PUT_LINE('Path ' || res_numeric || ' cost: ' || cost); res_string := SDO_NET_MEM.PATH.IS_CLOSED(net_mem, res_numeric); DBMS_OUTPUT.PUT_LINE('Is path ' || res_numeric || ' closed? ' || res_string); res_array := SDO_NET_MEM.PATH.GET_LINK_IDS(net_mem, res_numeric); DBMS_OUTPUT.PUT('Path ' || res_numeric || ' has links: '); FOR indx IN res_array.FIRST..res_array.LAST LOOP DBMS_OUTPUT.PUT(res_array(indx) || ' '); END LOOP; DBMS_OUTPUT.PUT_LINE(' '); res_array := SDO_NET_MEM.PATH.GET_NODE_IDS(net_mem, res_numeric); DBMS_OUTPUT.PUT('Path ' || res_numeric || ' has nodes: '); FOR indx IN res_array.FIRST..res_array.LAST LOOP DBMS_OUTPUT.PUT(res_array(indx) || ' '); END LOOP; DBMS_OUTPUT.PUT_LINE(' '); res_array := SDO_NET_MEM.NETWORK_MANAGER.WITHIN_COST(net_mem,102,100); DBMS_OUTPUT.PUT('Shortest path IDs to nodes within cost of 100 from node 102: '); DBMS_OUTPUT.PUT_LINE(' '); FOR indx IN res_array.FIRST..res_array.LAST LOOP res_numeric := res_array(indx); DBMS_OUTPUT.PUT(res_numeric || ', whose end node is: '); var1_numeric := SDO_NET_MEM.PATH.GET_END_NODE_ID(net_mem, res_numeric); DBMS_OUTPUT.PUT(var1_numeric); DBMS_OUTPUT.PUT_LINE(' '); Network Data Model Overview 5-53 Network Examples (PL/SQL) END LOOP; DBMS_OUTPUT.PUT_LINE(' '); END; / -- Link editing (SDO_NET_MEM.LINK) DECLARE net_mem res_string res_numeric res_array indx VARCHAR2(32); VARCHAR2(100); NUMBER; SDO_NUMBER_ARRAY; NUMBER; BEGIN net_mem := 'XYZ_NETWORK'; -- Read in the network. -- SDO_NET_MEM.NETWORK_MANAGER.READ_NETWORK(net_mem, 'TRUE'); -- GET_CHILD_LINKS res_array := SDO_NET_MEM.LINK.GET_CHILD_LINKS(net_mem, 1001); DBMS_OUTPUT.PUT('Link 1001 has the following child links: '); FOR indx IN res_array.FIRST..res_array.LAST LOOP DBMS_OUTPUT.PUT(res_array(indx) || ' '); END LOOP; DBMS_OUTPUT.PUT_LINE(' '); -- GET_COST res_numeric := SDO_NET_MEM.LINK.GET_COST(net_mem, 1104); DBMS_OUTPUT.PUT_LINE('The cost of link 1104 is: ' || res_numeric); -- GET_END_NODE_ID res_numeric := SDO_NET_MEM.LINK.GET_END_NODE_ID(net_mem, 1104); DBMS_OUTPUT.PUT_LINE('The end node of link 1104 is: ' || res_numeric); -- GET_LEVEL res_numeric := SDO_NET_MEM.LINK.GET_LEVEL(net_mem, 1001); DBMS_OUTPUT.PUT_LINE('The hierarchy level of link 1001 is: ' || res_numeric); -- GET_NAME res_string := SDO_NET_MEM.LINK.GET_NAME(net_mem, 1104); DBMS_OUTPUT.PUT_LINE('The name of link 1104 is: ' || res_string); -- GET_PARENT_LINK_ID res_numeric := SDO_NET_MEM.LINK.GET_PARENT_LINK_ID(net_mem, 1108); DBMS_OUTPUT.PUT_LINE('The parent link of link 1108 is: ' || res_numeric); -- GET_SIBLING_LINK_IDS res_array := SDO_NET_MEM.LINK.GET_SIBLING_LINK_IDS(net_mem, 1108); DBMS_OUTPUT.PUT('Link 1108 has the following sibling links: '); FOR indx IN res_array.FIRST..res_array.LAST LOOP DBMS_OUTPUT.PUT(res_array(indx) || ' '); END LOOP; DBMS_OUTPUT.PUT_LINE(' '); 5-54 Oracle Spatial Topology and Network Data Models Network Examples (PL/SQL) -- GET_START_NODE_ID res_numeric := SDO_NET_MEM.LINK.GET_START_NODE_ID(net_mem, 1104); DBMS_OUTPUT.PUT_LINE('The start node of link 1104 is: ' || res_numeric); -- GET_STATE res_string := SDO_NET_MEM.LINK.GET_STATE(net_mem, 1104); DBMS_OUTPUT.PUT_LINE('The state of link 1104 is: ' || res_string); -- IS_ACTIVE res_string := SDO_NET_MEM.LINK.IS_ACTIVE(net_mem, 1104); DBMS_OUTPUT.PUT_LINE('Is link 1104 active?: ' || res_string); -- IS_EXTERNAL_LINK res_string := SDO_NET_MEM.LINK.IS_EXTERNAL_LINK(net_mem, 1104); DBMS_OUTPUT.PUT_LINE('Is link 1104 an external link?: ' || res_string); -- IS_LOGICAL res_string := SDO_NET_MEM.LINK.IS_LOGICAL(net_mem, 1104); DBMS_OUTPUT.PUT_LINE('Is link 1104 a logical link?: ' || res_string); -- IS_TEMPORARY res_string := SDO_NET_MEM.LINK.IS_TEMPORARY(net_mem, 1104); DBMS_OUTPUT.PUT_LINE('Is link 1104 temporary?: ' || res_string); -- SET_COST -- Set the cost of link 1119 to 40. SDO_NET_MEM.LINK.SET_COST(net_mem, 1119, 40); -- SET_END_NODE -- Set the end node of link 1119 to 109 (N9). SDO_NET_MEM.LINK.SET_END_NODE(net_mem, 1119, 109); -- SET_LEVEL -- Set the hierarchy level of link 1119 to 2. SDO_NET_MEM.LINK.SET_LEVEL(net_mem, 1119, 2); -- SET_NAME -- Set the name of link 1119 to 'My favorite link'. SDO_NET_MEM.LINK.SET_NAME(net_mem, 1119, 'My favorite link'); -- SET_PARENT_LINK -- Make link 1001 the parent of link 1119. SDO_NET_MEM.LINK.SET_PARENT_LINK(net_mem, 1119, 1001); -- SET_START_NODE -- Set the start node of link 1119 to 110 (N10). SDO_NET_MEM.LINK.SET_START_NODE(net_mem, 1119, 110); -- SET_STATE -- Set the state of link 1119 to 'INACTIVE'. SDO_NET_MEM.LINK.SET_STATE(net_mem, 1119, 'INACTIVE'); -- GET_STATE res_string := SDO_NET_MEM.LINK.GET_STATE(net_mem, 1119); DBMS_OUTPUT.PUT_LINE('The state of link 1119 is: ' || res_string); -- SET_TYPE -- Set the type of link 1119 to 'Associative'. SDO_NET_MEM.LINK.SET_TYPE(net_mem, 1119, 'Associative'); -- GET_TYPE res_string := SDO_NET_MEM.LINK.GET_TYPE(net_mem, 1119); Network Data Model Overview 5-55 Network Examples (PL/SQL) DBMS_OUTPUT.PUT_LINE('The type of link 1119 is: ' || res_string); END; / -- Node editing (SDO_NET_MEM.NODE) DECLARE net_mem res_string res_numeric res_array indx VARCHAR2(32); VARCHAR2(100); NUMBER; SDO_NUMBER_ARRAY; NUMBER; BEGIN net_mem := 'XYZ_NETWORK'; -- GET_ADJACENT_NODE_IDS res_array := SDO_NET_MEM.NODE.GET_ADJACENT_NODE_IDS(net_mem, 103); DBMS_OUTPUT.PUT('Node 103 has the following adjacent nodes: '); FOR indx IN res_array.FIRST..res_array.LAST LOOP DBMS_OUTPUT.PUT(res_array(indx) || ' '); END LOOP; DBMS_OUTPUT.PUT_LINE(' '); -- GET_CHILD_NODE_IDS res_array := SDO_NET_MEM.NODE.GET_CHILD_NODE_IDS(net_mem, 1); DBMS_OUTPUT.PUT('Node 1 has the following child nodes: '); FOR indx IN res_array.FIRST..res_array.LAST LOOP DBMS_OUTPUT.PUT(res_array(indx) || ' '); END LOOP; DBMS_OUTPUT.PUT_LINE(' '); -- GET_COMPONENT_NO res_numeric := SDO_NET_MEM.NODE.GET_COMPONENT_NO(net_mem, 103); DBMS_OUTPUT.PUT_LINE('The component number of node 103 is: ' || res_numeric); -- GET_COST res_numeric := SDO_NET_MEM.NODE.GET_COST(net_mem, 103); DBMS_OUTPUT.PUT_LINE('The cost of node 103 is: ' || res_numeric); -- GET_EXTERNAL_NETWORK_ID res_numeric := SDO_NET_MEM.NODE.GET_EXTERNAL_NETWORK_ID(net_mem, 103); DBMS_OUTPUT.PUT_LINE('The external network ID for node 103 is: ' || res_numeric); -- GET_EXTERNAL_NETWORK_NAME res_string := SDO_NET_MEM.NODE.GET_EXTERNAL_NETWORK_NAME(net_mem, 103); DBMS_OUTPUT.PUT_LINE('The external network name for node 103 is: ' || res_ numeric); -- GET_EXTERNAL_NODE_ID res_numeric := SDO_NET_MEM.NODE.GET_EXTERNAL_NODE_ID(net_mem, 103); DBMS_OUTPUT.PUT_LINE('The external node ID of node 103 is: ' || res_numeric); -- GET_HIERARCHY_LEVEL res_numeric := SDO_NET_MEM.NODE.GET_HIERARCHY_LEVEL(net_mem, 1); DBMS_OUTPUT.PUT_LINE('The hierarchy level of node 1 is: ' || res_numeric); 5-56 Oracle Spatial Topology and Network Data Models Network Examples (PL/SQL) -- GET_IN_LINK_IDS res_array := SDO_NET_MEM.NODE.GET_IN_LINK_IDS(net_mem, 103); DBMS_OUTPUT.PUT('Node 103 has the following inbound links: '); FOR indx IN res_array.FIRST..res_array.LAST LOOP DBMS_OUTPUT.PUT(res_array(indx) || ' '); END LOOP; DBMS_OUTPUT.PUT_LINE(' '); -- GET_INCIDENT_LINK_IDS res_array := SDO_NET_MEM.NODE.GET_INCIDENT_LINK_IDS(net_mem, 103); DBMS_OUTPUT.PUT('Node 103 has the following incident links: '); FOR indx IN res_array.FIRST..res_array.LAST LOOP DBMS_OUTPUT.PUT(res_array(indx) || ' '); END LOOP; DBMS_OUTPUT.PUT_LINE(' '); -- GET_NAME res_string := SDO_NET_MEM.NODE.GET_NAME(net_mem, 103); DBMS_OUTPUT.PUT_LINE('The name of node 103 is: ' || res_string); -- GET_OUT_LINK_IDS res_array := SDO_NET_MEM.NODE.GET_OUT_LINK_IDS(net_mem, 103); DBMS_OUTPUT.PUT('Node 103 has the following outbound links: '); FOR indx IN res_array.FIRST..res_array.LAST LOOP DBMS_OUTPUT.PUT(res_array(indx) || ' '); END LOOP; DBMS_OUTPUT.PUT_LINE(' '); -- GET_PARENT_NODE_ID res_numeric := SDO_NET_MEM.NODE.GET_PARENT_NODE_ID(net_mem, 103); DBMS_OUTPUT.PUT_LINE('The parent node of node 103 is: ' || res_numeric); -- GET_PARTITION_ID res_numeric := SDO_NET_MEM.NODE.GET_PARTITION_ID(net_mem, 103); DBMS_OUTPUT.PUT_LINE('The partition for node 103 is: ' || res_numeric); -- GET_SIBLING_NODE_IDS res_array := SDO_NET_MEM.NODE.GET_SIBLING_NODE_IDS(net_mem, 103); DBMS_OUTPUT.PUT('Node 103 has the following sibling nodes: '); FOR indx IN res_array.FIRST..res_array.LAST LOOP DBMS_OUTPUT.PUT(res_array(indx) || ' '); END LOOP; DBMS_OUTPUT.PUT_LINE(' '); -- GET_STATE res_string := SDO_NET_MEM.NODE.GET_STATE(net_mem, 103); DBMS_OUTPUT.PUT_LINE('The state of node 103 is: ' || res_string); -- IS_ACTIVE res_string := SDO_NET_MEM.NODE.IS_ACTIVE(net_mem, 103); DBMS_OUTPUT.PUT_LINE('Is node 103 active?: ' || res_string); -- IS_EXTERNAL_NODE res_string := SDO_NET_MEM.NODE.IS_EXTERNAL_NODE(net_mem, 103); DBMS_OUTPUT.PUT_LINE('Is node 103 an external node?: ' || res_string); Network Data Model Overview 5-57 Network Examples (PL/SQL) -- IS_LOGICAL res_string := SDO_NET_MEM.NODE.IS_LOGICAL(net_mem, 103); DBMS_OUTPUT.PUT_LINE('Is node 103 a logical node?: ' || res_string); -- IS_TEMPORARY res_string := SDO_NET_MEM.NODE.IS_TEMPORARY(net_mem, 103); DBMS_OUTPUT.PUT_LINE('Is node 103 temporary?: ' || res_string); -- LINK_EXISTS res_string := SDO_NET_MEM.NODE.LINK_EXISTS(net_mem, 103, 104); DBMS_OUTPUT.PUT_LINE('Does a link exist between nodes 103 and 104?: ' || res_ string); -- MAKE_TEMPORARY -- Make node 114 temporary. SDO_NET_MEM.NODE.MAKE_TEMPORARY(net_mem, 114); -- SET_COMPONENT_NO -- Set the component number of node 114 to 987. SDO_NET_MEM.NODE.SET_COMPONENT_NO(net_mem, 114, 987); -- SET_COST -- Set the cost of node 114 to 40. SDO_NET_MEM.NODE.SET_COST(net_mem, 114, 40); -- SET_EXTERNAL_NETWORK_ID -- Set the external network ID of node 114 to 1000. SDO_NET_MEM.NODE.SET_EXTERNAL_NETWORK_ID(net_mem, 114, 1000); -- SET_EXTERNAL_NODE_ID -- Set the external node ID of node 114 to 1014. SDO_NET_MEM.NODE.SET_EXTERNAL_NODE_ID(net_mem, 114, 1014); -- SET_HIERARCHY_LEVEL -- Set the hierarchy level of node 1 to 2. SDO_NET_MEM.NODE.SET_HIERARCHY_LEVEL(net_mem, 1, 2); -- SET_NAME -- Set the name of node 114 to 'My favorite node'. SDO_NET_MEM.NODE.SET_NAME(net_mem, 114, 'My favorite node'); -- GET_NAME res_string := SDO_NET_MEM.NODE.GET_NAME(net_mem, 114); DBMS_OUTPUT.PUT_LINE('The name of node 114 is: ' || res_string); -- SET_PARENT_NODE -- Make node 1 the parent of node 114. SDO_NET_MEM.NODE.SET_PARENT_NODE(net_mem, 114, 1); -- SET_STATE -- Set the state of node 111 to 'INACTIVE'. SDO_NET_MEM.NODE.SET_STATE(net_mem, 111, 'INACTIVE'); -- GET_STATE res_string := SDO_NET_MEM.NODE.GET_STATE(net_mem, 111); DBMS_OUTPUT.PUT_LINE('The state of node 111 is: ' || res_string); -- SET_TYPE -- Set the type of node 114 to 'Research'. SDO_NET_MEM.NODE.SET_TYPE(net_mem, 114, 'Research'); -- GET_TYPE 5-58 Oracle Spatial Topology and Network Data Models Network Examples (PL/SQL) res_string := SDO_NET_MEM.NODE.GET_TYPE(net_mem, 114); DBMS_OUTPUT.PUT_LINE('The type of node 114 is: ' || res_string); END; / -- Path editing (SDO_NET_MEM.PATH) DECLARE net_mem res_string res_numeric path_id res_array indx VARCHAR2(32); VARCHAR2(100); NUMBER; NUMBER; SDO_NUMBER_ARRAY; NUMBER; BEGIN net_mem := 'XYZ_NETWORK'; -- Create a path for use with subsequent statements. Here, it is -- the shortest path between nodes 101 (N1) and 105 (N5). path_id := SDO_NET_MEM.NETWORK_MANAGER.SHORTEST_PATH(net_mem,101,105); DBMS_OUTPUT.PUT_LINE('The shortest path between nodes 101 and 105 is: ' || path_ id); -- GET_LINK_IDS res_array := SDO_NET_MEM.PATH.GET_LINK_IDS(net_mem, path_id); DBMS_OUTPUT.PUT_LINE('Path ' || path_id || ' has the following links: '); FOR indx IN res_array.FIRST..res_array.LAST LOOP DBMS_OUTPUT.PUT(res_array(indx) || ' '); END LOOP; DBMS_OUTPUT.PUT_LINE(' '); -- GET_COST res_numeric := SDO_NET_MEM.PATH.GET_COST(net_mem, path_id); DBMS_OUTPUT.PUT_LINE('The cost of path ' || path_id || ' is: ' || res_numeric); -- GET_END_NODE_ID res_numeric := SDO_NET_MEM.PATH.GET_END_NODE_ID(net_mem, path_id); DBMS_OUTPUT.PUT_LINE('The end node ID of path ' || path_id || ' is: ' || res_ numeric); -- GET_LINK_IDS res_array := SDO_NET_MEM.PATH.GET_LINK_IDS(net_mem, path_id); DBMS_OUTPUT.PUT_LINE('Path ' || path_id || ' has the following links: '); FOR indx IN res_array.FIRST..res_array.LAST LOOP DBMS_OUTPUT.PUT(res_array(indx) || ' '); END LOOP; DBMS_OUTPUT.PUT_LINE(' '); -- GET_NO_OF_LINKS res_numeric := SDO_NET_MEM.PATH.GET_NO_OF_LINKS(net_mem, path_id); DBMS_OUTPUT.PUT_LINE('The number of links in path ' || path_id || ' is: ' || res_ numeric); -- GET_NODE_IDS res_array := SDO_NET_MEM.PATH.GET_NODE_IDS(net_mem, path_id); Network Data Model Overview 5-59 Network Examples (PL/SQL) DBMS_OUTPUT.PUT('Path ' || path_id || ' has the following nodes: '); FOR indx IN res_array.FIRST..res_array.LAST LOOP DBMS_OUTPUT.PUT(res_array(indx) || ' '); END LOOP; DBMS_OUTPUT.PUT_LINE(' '); -- GET_START_NODE_ID res_numeric := SDO_NET_MEM.PATH.GET_START_NODE_ID(net_mem, path_id); DBMS_OUTPUT.PUT_LINE('The start node ID of path ' || path_id || ' is: ' || res_ numeric); -- IS_ACTIVE res_string := SDO_NET_MEM.PATH.IS_ACTIVE(net_mem, path_id); DBMS_OUTPUT.PUT_LINE('Is path ' || path_id || ' active?: ' || res_string); -- IS_CLOSED res_string := SDO_NET_MEM.PATH.IS_CLOSED(net_mem, path_id); DBMS_OUTPUT.PUT_LINE('Is path ' || path_id || ' closed?: ' || res_string); -- IS_CONNECTED res_string := SDO_NET_MEM.PATH.IS_CONNECTED(net_mem, path_id); DBMS_OUTPUT.PUT_LINE('Is path ' || path_id || ' connected?: ' || res_string); -- IS_LOGICAL res_string := SDO_NET_MEM.PATH.IS_LOGICAL(net_mem, path_id); DBMS_OUTPUT.PUT_LINE('Is path ' || path_id || ' a logical path?: ' || res_string); -- IS_SIMPLE res_string := SDO_NET_MEM.PATH.IS_SIMPLE(net_mem, path_id); DBMS_OUTPUT.PUT_LINE('Is path ' || path_id || ' a simple path?: ' || res_string); -- IS_TEMPORARY res_string := SDO_NET_MEM.PATH.IS_TEMPORARY(net_mem, path_id); DBMS_OUTPUT.PUT_LINE('Is path ' || path_id || ' temporary?: ' || res_string); -- SET_NAME -- Set the name of path to 'My favorite path'. SDO_NET_MEM.PATH.SET_NAME(net_mem, path_id, 'My favorite path'); -- GET_NAME res_string := SDO_NET_MEM.PATH.GET_NAME(net_mem, path_id); DBMS_OUTPUT.PUT_LINE('The name of path ' || path_id || ' is: ' || res_string); -- SET_TYPE -- Set the type of the path to 'Logical connections'. SDO_NET_MEM.PATH.SET_TYPE(net_mem, path_id, 'Logical connections'); -- GET_TYPE res_string := SDO_NET_MEM.PATH.GET_TYPE(net_mem, path_id); DBMS_OUTPUT.PUT_LINE('The type of path ' || path_id || ' is: ' || res_string); -- SET_PATH_ID -- Set (change) the path ID of the path to 6789. SDO_NET_MEM.PATH.SET_PATH_ID(net_mem, path_id, 6789); END; / 5-60 Oracle Spatial Topology and Network Data Models README File for Spatial and Related Features 5.12 Network Editor and Other Demo Files Oracle Spatial provides several network data model demo files that you can use to reinforce your learning and to create models for coding certain operations. Some of these files are for the Network Editor, an unsupported tool that enables you to visualize and edit network data. (The Network Editor interface is shown in Figure 5–1 in Section 5.1.) If you installed the demo files from the Companion CD, those related to the network data model are under the following directory: $ORACLE_HOME/md/demos/network The files for the Network Editor are in the following directory: $ORACLE_HOME/md/demos/network/editor Read the README.txt file in that directory for information about this tool. Sample data for the network data model is under the following directory: $ORACLE_HOME/md/demos/network/editor_download_kit For example, New York City sample network data is in the following directory: $ORACLE_HOME/md/demos/network/editor_download_kit/nyc_sample_data Read the data_load_instructions.txt file in that directory for information about loading the New York City sample network data into the database. 5.13 README File for Spatial and Related Features A README.txt file supplements the information in the following manuals: Oracle Spatial User's Guide and Reference, Oracle Spatial GeoRaster, and Oracle Spatial Topology and Network Data Models (this manual). This file is located at: $ORACLE_HOME/md/doc/README.txt Network Data Model Overview 5-61 README File for Spatial and Related Features 5-62 Oracle Spatial Topology and Network Data Models 6 SDO_NET Package Subprograms The MDSYS.SDO_NET package contains subprograms (functions and procedures) for managing networks. To use the subprograms in this chapter, you must understand the conceptual information in Chapter 5. For a listing of the subprograms grouped in logical categories, see Section 5.10.1. The rest of this chapter provides reference information about the subprograms, listed in alphabetical order. SDO_NET Package Subprograms 6-1 SDO_NET.COPY_NETWORK SDO_NET.COPY_NETWORK Format SDO_NET.COPY_NETWORK( source_network IN VARCHAR2, target_network IN VARCHAR2); Description Creates a copy of a network, including its metadata tables. Parameters source_network Name of the network to be copied. target_network Name of the network to be created as a copy of source_network. Usage Notes This procedure creates an entry in the xxx_SDO_NETWORK_METADATA views (described in Section 5.9.1) for target_network that has the same information as for source_network, except for the new network name. This procedure also creates a new node table, link table, and path table (if a path table exists for source_network) for target_network based on the metadata and data in these tables for source_network. These tables have names in the form _NODE$, _LINK$, and _PATH$. For example, if target_network has the value ROADS_NETWORK2 and if source_ network has a path table, the names of the created metadata tables are ROADS_ NETWORK2_NODE$, ROADS_NETWORK2_LINK$, and ROADS_NETWORK2_ PATH$. Examples The following example creates a new network named ROADS_NETWORK2 that is a copy of the network named ROADS_NETWORK. EXECUTE SDO_NET.COPY_NETWORK('ROADS_NETWORK', 'ROADS_NETWORK2'); 6-2 Oracle Spatial Topology and Network Data Models SDO_NET.CREATE_LINK_TABLE SDO_NET.CREATE_LINK_TABLE Format SDO_NET.CREATE_LINK_TABLE( table_name IN VARCHAR2, geom_type IN VARCHAR2, geom_column IN VARCHAR2, cost_column IN VARCHAR2, no_of_hierarchy_levels IN NUMBER); Description Creates a link table for a network. Parameters table_name Name of the link table. geom_type For a spatial network, specify a value indicating the geometry type of links: SDO_ GEOMETRY for non-LRS SDO_GEOMETRY objects, LRS_GEOMETRY for LRS SDO_ GEOMETRY objects, or TOPO_GEOMETRY for SDO_TOPO_GEOMETRY objects. geom_column For a spatial network, the name of the column containing the geometry objects associated with the links. cost_column Name of the column containing the cost values to be associated with the links. no_of_hierarchy_levels Number of hierarchy levels for links in the network. (For an explanation of network hierarchy, see Section 5.5.) Usage Notes The link table is described in Section 5.8.2. Examples The following example creates a link table named ROADS_LINKS, with a geometry column named LINK_GEOMETRY that will contain LRS geometries, a cost column named COST, and a single hierarchy level. EXECUTE SDO_NET.CREATE_LINK_TABLE('ROADS_LINKS', 'LRS_GEOMETRY', 'LINK_GEOMETRY', 'COST', 1); SDO_NET Package Subprograms 6-3 SDO_NET.CREATE_LOGICAL_NETWORK SDO_NET.CREATE_LOGICAL_NETWORK Format SDO_NET.CREATE_LOGICAL_NETWORK( network IN VARCHAR2, no_of_hierarchy_levels IN NUMBER, is_directed IN BOOLEAN, node_with_cost IN BOOLEAN DEFAULT FALSE); or SDO_NET.CREATE_LOGICAL_NETWORK( network IN VARCHAR2, no_of_hierarchy_levels IN NUMBER, is_directed IN BOOLEAN, node_table_name IN VARCHAR2, node_cost_column IN VARCHAR2, link_table_name IN VARCHAR2, link_cost_column IN VARCHAR2, path_table_name IN VARCHAR2, path_link_table_name IN VARCHAR2); Description Creates a logical network, creates all necessary tables, and updates the network metadata. Parameters network Network name. no_of_hierarchy_levels Number of hierarchy levels for links in the network. (For an explanation of network hierarchy, see Section 5.5.) is_directed A Boolean value. TRUE indicates that the links are directed; FALSE indicates that the links are undirected (not directed). node_with_cost A Boolean value. TRUE causes a column named COST to be included in the _NODE$ table; FALSE (the default) causes a column named COST not to be included in the _NODE$ table. 6-4 Oracle Spatial Topology and Network Data Models SDO_NET.CREATE_LOGICAL_NETWORK node_table_name Name of the node table to be created. (The node table is explained in Section 5.8.1.) If you use the format that does not specify this parameter, a node table named _NODE$ is created. node_cost_column Name of the cost column in the node table. (The node table is explained in Section 5.8.1.) If you use the format that does not specify this parameter, the geometry column is named COST. link_table_name Name of the link table to be created. (The link table is explained in Section 5.8.2.) If you use the format that does not specify this parameter, a link table named _LINK$ is created. link_cost_column Name of the cost column in the link table. (The link table is explained in Section 5.8.2.) If you use the format that does not specify this parameter, the geometry column is named COST. path_table_name Name of the path table to be created. (The path table is explained in Section 5.8.3.) If you use the format that does not specify this parameter, a path table named _PATH$ is created. path_link_table_name Name of the path-link table to be created. (The path-link table is explained in Section 5.8.4.) If you use the format that does not specify this parameter, a path-link table named _PLINK$ is created. Usage Notes This procedure provides a convenient way to create a logical network when the node, link, and optional related tables do not already exist. The procedure creates the network; creates the node, link, path, and path-link tables for the network; and inserts the appropriate information in the xxx_SDO_NETWORK_METADATA views (described in Section 5.9.1). An exception is generated if any of the tables to be created already exists. The procedure has two formats. The simpler format creates the tables using default values for the table name and the cost column name. The other format lets you specify names for the tables and the cost column. As an alternative to using this procedure, you can create the network using the SDO_ NET.CREATE_LOGICAL_NETWORK procedure; create the tables using the SDO_ NET.CREATE_NODE_TABLE, SDO_NET.CREATE_LINK_TABLE, SDO_ NET.CREATE_PATH_TABLE, and SDO_NET.CREATE_PATH_LINK_TABLE procedures; and insert the appropriate row in the USER_SDO_NETWORK_ METADATA view. Examples The following example creates a directed logical network named LOG_NET1. The example creates the LOG_NET1_NODE$, LOG_NET1_LINK$,LOG_NET1_PATH$, and LOG_NET1_PLINK$ tables, and updates the xxx_SDO_NETWORK_METADATA views. Both the node and link tables contain a cost column named COST. EXECUTE SDO_NET.CREATE_LOGICAL_NETWORK('LOG_NET1', 1, TRUE, TRUE); SDO_NET Package Subprograms 6-5 SDO_NET.CREATE_LRS_NETWORK SDO_NET.CREATE_LRS_NETWORK Format SDO_NET.CREATE_LRS_NETWORK( network IN VARCHAR2, lrs_table_name IN VARCHAR2, lrs_geom_column IN VARCHAR2, no_of_hierarchy_levels IN NUMBER, is_directed IN BOOLEAN, node_with_cost IN BOOLEAN DEFAULT FALSE, is_complex IN BOOLEAN DEFAULT FALSE); or SDO_NET.CREATE_LRS_NETWORK( network IN VARCHAR2, no_of_hierarchy_levels IN NUMBER, is_directed IN BOOLEAN, node_table_name IN VARCHAR2, node_cost_column IN VARCHAR2, link_table_name IN VARCHAR2, link_cost_column IN VARCHAR2, lrs_table_name IN VARCHAR2, lrs_geom_column IN VARCHAR2, path_table_name IN VARCHAR2, path_geom_column IN VARCHAR2, path_link_table_name IN VARCHAR2, is_complex IN BOOLEAN DEFAULT FALSE); Description Creates a spatial network containing LRS SDO_GEOMETRY objects, creates all necessary tables, and updates the network metadata. Parameters network Network name. lrs_table_name Name of the table containing the LRS geometry column. lrs_geom_column Name of the column in lrs_table_name that contains LRS geometries (that is, SDO_ GEOMETRY objects that include measure information for linear referencing). 6-6 Oracle Spatial Topology and Network Data Models SDO_NET.CREATE_LRS_NETWORK is_directed A Boolean value. TRUE indicates that the links are directed; FALSE indicates that the links are undirected (not directed). no_of_hierarchy_levels Number of hierarchy levels for links in the network. (For an explanation of network hierarchy, see Section 5.5.) node_with_cost A Boolean value. TRUE causes a column named COST to be included in the _NODE$ table; FALSE (the default) causes a column named COST not to be included in the _NODE$ table. is_complex Reserved for future use. Ignored for the current release. node_table_name Name of the node table to be created. (The node table is explained in Section 5.8.1.) If you use the format that does not specify this parameter, a node table named _NODE$ is created. node_cost_column Name of the cost column in the node table. (The node table is explained in Section 5.8.1.) If you use the format that does not specify this parameter, the geometry column is named COST. link_table_name Name of the link table to be created. (The link table is explained in Section 5.8.2.) If you use the format that does not specify this parameter, a link table named _LINK$ is created. link_cost_column Name of the cost column in the link table. (The link table is explained in Section 5.8.2.) If you use the format that does not specify this parameter, the geometry column is named COST. path_table_name Name of the path table to be created. (The path table is explained in Section 5.8.3.) If you use the format that does not specify this parameter, a path table named _PATH$ is created. path_geom_column Name of the geometry column in the path table. (The path table is explained in Section 5.8.3.) If you use the format that does not specify this parameter, the geometry column is named GEOMETRY. path_link_table_name Name of the path-link table to be created. (The path-link table is explained in Section 5.8.4.) If you use the format that does not specify this parameter, a path-link table named _PLINK$ is created. Usage Notes This procedure provides a convenient way to create a spatial network of LRS geometries when the node, link, and optional related tables do not already exist. The procedure creates the network; creates the node, link, path, and path-link tables for the SDO_NET Package Subprograms 6-7 SDO_NET.CREATE_LRS_NETWORK network; and inserts the appropriate information in the xxx_SDO_NETWORK_ METADATA views (described in Section 5.9.1). An exception is generated if any of the tables to be created already exists. The procedure has two formats. The simpler format creates the tables using default values for the table name and the geometry and cost column names. The other format lets you specify names for the tables and the geometry and cost columns. As an alternative to using this procedure, you can create the network using the SDO_ NET.CREATE_LRS_NETWORK procedure; create the tables using the SDO_ NET.CREATE_NODE_TABLE, SDO_NET.CREATE_LINK_TABLE, SDO_ NET.CREATE_PATH_TABLE, and SDO_NET.CREATE_PATH_LINK_TABLE procedures; and insert the appropriate row in the USER_SDO_NETWORK_ METADATA view. Examples The following example creates a directed spatial network named LRS_NET1. The LRS geometries are in the column named LRS_GEOM in the table named LRS_TAB. The example creates the LRS_NET1_NODE$, LRS_NET1_LINK$, LRS_NET1_PATH$, and LRS_NET1_PLINK$ tables, and updates the xxx_SDO_NETWORK_METADATA views. All geometry columns are named GEOMETRY. Both the node and link tables contain a cost column named COST. EXECUTE SDO_NET.CREATE_LRS_NETWORK('LRS_NET1', 'LRS_TAB', 'LRS_GEOM', 1, TRUE, TRUE); 6-8 Oracle Spatial Topology and Network Data Models SDO_NET.CREATE_LRS_TABLE SDO_NET.CREATE_LRS_TABLE Format SDO_NET.CREATE_LRS_TABLE( table_name IN VARCHAR2, geom_column IN VARCHAR2); Description Creates a table for storing Oracle Spatial linear referencing system (LRS) geometries. Parameters table_name Name of the table containing the geometry column specified in geom_column. geom_column Name of the column (of type SDO_GEOMETRY) to contain geometry objects. Usage Notes This procedure creates a table named table_name with two columns: GEOM_ID of type NUMBER and geom_column of type SDO_GEOMETRY. Although the created table does not need to be used to store LRS geometries, the procedure is intended as a convenient method for creating a table to store such geometries. You will probably want to modify the table to add other columns before you store data in the table. Examples The following example creates a table named HIGHWAYS with a geometry column named GEOM. EXECUTE SDO_NET.CREATE_LRS_TABLE('HIGHWAYS', 'GEOM'); PL/SQL procedure successfully completed. DESCRIBE highways Name Null? ----------------------------------------- -------GEOM_ID NOT NULL GEOM Type ---------------------------NUMBER MDSYS.SDO_GEOMETRY SDO_NET Package Subprograms 6-9 SDO_NET.CREATE_NODE_TABLE SDO_NET.CREATE_NODE_TABLE Format SDO_NET.CREATE_NODE_TABLE( table_name IN VARCHAR2, geom_type IN VARCHAR2, geom_column IN VARCHAR2, cost_column IN VARCHAR2, no_of_hierarchy_levels IN NUMBER); Description Creates a node table. Parameters table_name Name of the node table. geom_type For a spatial network, specify a value indicating the geometry type of nodes: SDO_ GEOMETRY for non-LRS SDO_GEOMETRY objects, LRS_GEOMETRY for LRS SDO_ GEOMETRY objects, or TOPO_GEOMETRY for SDO_TOPO_GEOMETRY objects. geom_column For a spatial network, the name of the column containing the geometry objects associated with the nodes. cost_column Name of the column containing the cost values to be associated with the nodes. no_of_hierarchy_levels Number of hierarchy levels for nodes in the network. (For an explanation of network hierarchy, see Section 5.5.) Usage Notes The node table is described in Section 5.8.1. Examples The following example creates a node table named ROADS_NODES with a geometry column named NODE_GEOMETRY that will contain LRS geometries, no cost column, and a single hierarchy level. EXECUTE SDO_NET.CREATE_NODE_TABLE('ROADS_NODES', 'LRS_GEOMETRY', 'NODE_GEOMETRY', NULL, 1); 6-10 Oracle Spatial Topology and Network Data Models SDO_NET.CREATE_PATH_LINK_TABLE SDO_NET.CREATE_PATH_LINK_TABLE Format SDO_NET.CREATE_PATH_LINK_TABLE( table_name IN VARCHAR2); Description Creates a path-link table, that is, a table with a row for each link in each path in the path table. Parameters table_name Name of the path-link table. Usage Notes The path-link table is described in Section 5.8.4. To use paths with a network, you must populate the path-link table. Examples The following example creates a path-link table named ROADS_PATHS_LINKS. EXECUTE SDO_NET.CREATE_PATH_LINK_TABLE('ROADS_PATHS_LINKS'); SDO_NET Package Subprograms 6-11 SDO_NET.CREATE_PATH_TABLE SDO_NET.CREATE_PATH_TABLE Format SDO_NET.CREATE_PATH_TABLE( table_name IN VARCHAR2, geom_column IN VARCHAR2); Description Creates a path table. Parameters table_name Name of the path table. geom_column For a spatial network, name of the column containing the geometry objects associated with the paths. Usage Notes The path table is described in Section 5.8.3. To use paths with a network, after you create the path table, you must create the path-link table using the SDO_NET.CREATE_PATH_LINK_TABLE procedure, and populate the path-link table. Examples The following example creates a path table named ROADS_PATHS that contains a geometry column named PATH_GEOMETRY. EXECUTE SDO_NET.CREATE_PATH_TABLE('ROADS_PATHS', 'PATH_GEOMETRY'); 6-12 Oracle Spatial Topology and Network Data Models SDO_NET.CREATE_SDO_NETWORK SDO_NET.CREATE_SDO_NETWORK Format SDO_NET.CREATE_SDO_NETWORK( network IN VARCHAR2, no_of_hierarchy_levels IN NUMBER, is_directed IN BOOLEAN, node_with_cost IN BOOLEAN DEFAULT FALSE); or SDO_NET.CREATE_SDO_NETWORK( network IN VARCHAR2, no_of_hierarchy_levels IN NUMBER, is_directed IN BOOLEAN, node_table_name IN VARCHAR2, node_geom_column IN VARCHAR2, node_cost_column IN VARCHAR2, link_table_name IN VARCHAR2, link_geom_column IN VARCHAR2, link_cost_column IN VARCHAR2, path_table_name IN VARCHAR2, path_geom_column IN VARCHAR2, path_link_table_name IN VARCHAR2); Description Creates a spatial network containing non-LRS SDO_GEOMETRY objects, creates all necessary tables, and updates the network metadata. Parameters network Network name. no_of_hierarchy_levels Number of hierarchy levels for links in the network. (For an explanation of network hierarchy, see Section 5.5.) is_directed A Boolean value. TRUE indicates that the links are directed; FALSE indicates that the links are undirected (not directed). node_with_cost A Boolean value. TRUE causes a column named COST to be included in the _NODE$ table; FALSE (the default) causes a column named COST not to be included in the _NODE$ table. SDO_NET Package Subprograms 6-13 SDO_NET.CREATE_SDO_NETWORK node_table_name Name of the node table to be created. (The node table is explained in Section 5.8.1.) If you use the format that does not specify this parameter, a node table named _NODE$ is created. node_geom_column Name of the geometry column in the node table. (The node table is explained in Section 5.8.1.) If you use the format that does not specify this parameter, the geometry column is named GEOMETRY. node_cost_column Name of the cost column in the node table. (The node table is explained in Section 5.8.1.) If you use the format that does not specify this parameter, the geometry column is named COST. link_table_name Name of the link table to be created. (The link table is explained in Section 5.8.2.) If you use the format that does not specify this parameter, a link table named _LINK$ is created. link_geom_column Name of the geometry column in the link table. (The link table is explained in Section 5.8.2.) If you use the format that does not specify this parameter, the geometry column is named GEOMETRY. link_cost_column Name of the cost column in the link table. (The link table is explained in Section 5.8.2.) If you use the format that does not specify this parameter, the geometry column is named COST. path_table_name Name of the path table to be created. (The path table is explained in Section 5.8.3.) If you use the format that does not specify this parameter, a path table named _PATH$ is created. path_geom_column Name of the geometry column in the path table. (The path table is explained in Section 5.8.3.) If you use the format that does not specify this parameter, the geometry column is named GEOMETRY. path_link_table_name Name of the path-link table to be created. (The path-link table is explained in Section 5.8.4.) If you use the format that does not specify this parameter, a path-link table named _PLINK$ is created. Usage Notes This procedure provides a convenient way to create a spatial network when the node, link, and optional related tables do not already exist. The procedure creates the network; creates the node, link, path, and path-link tables for the network; and inserts the appropriate information in the xxx_SDO_NETWORK_METADATA views (described in Section 5.9.1). An exception is generated if any of the tables to be created already exists. The procedure has two formats. The simpler format creates the tables using default values for the table name and the geometry and cost column names. The other format lets you specify names for the tables and the geometry and cost columns. 6-14 Oracle Spatial Topology and Network Data Models SDO_NET.CREATE_SDO_NETWORK As an alternative to using this procedure, you can create the network using the SDO_ NET.CREATE_SDO_NETWORK procedure; create the tables using the SDO_ NET.CREATE_NODE_TABLE, SDO_NET.CREATE_LINK_TABLE, SDO_ NET.CREATE_PATH_TABLE, and SDO_NET.CREATE_PATH_LINK_TABLE procedures; and insert the appropriate row in the USER_SDO_NETWORK_ METADATA view. Examples The following example creates a directed spatial network named SDO_NET1. The example creates the SDO_NET1_NODE$, SDO_NET1_LINK$, SDO_NET1_PATH$, and SDO_NET1_PLINK$ tables, and updates the xxx_SDO_NETWORK_METADATA views. All geometry columns are named GEOMETRY. Both the node and link tables contain a cost column named COST. EXECUTE SDO_NET.CREATE_SDO_NETWORK('SDO_NET1', 1, TRUE, TRUE); SDO_NET Package Subprograms 6-15 SDO_NET.CREATE_TOPO_NETWORK SDO_NET.CREATE_TOPO_NETWORK Format SDO_NET.CREATE_TOPO_NETWORK( network IN VARCHAR2, no_of_hierarchy_levels IN NUMBER, is_directed IN BOOLEAN, node_with_cost IN BOOLEAN DEFAULT FALSE); or SDO_NET.CREATE_TOPO_NETWORK( network IN VARCHAR2, no_of_hierarchy_levels IN NUMBER, is_directed IN BOOLEAN, node_table_name IN VARCHAR2, node_cost_column IN VARCHAR2, link_table_name IN VARCHAR2, link_cost_column IN VARCHAR2, path_table_name IN VARCHAR2, path_geom_column IN VARCHAR2, path_link_table_name IN VARCHAR2); Description Creates a spatial topology network containing SDO_TOPO_GEOMETRY objects, creates all necessary tables, and updates the network metadata. Parameters network Network name. no_of_hierarchy_levels Number of hierarchy levels for links in the network. (For an explanation of network hierarchy, see Section 5.5.) is_directed A Boolean value. TRUE indicates that the links are directed; FALSE indicates that the links are undirected (not directed). node_with_cost A Boolean value. TRUE causes a column named COST to be included in the _NODE$ table; FALSE (the default) causes a column named COST not to be included in the _NODE$ table. 6-16 Oracle Spatial Topology and Network Data Models SDO_NET.CREATE_TOPO_NETWORK node_table_name Name of the node table to be created. (The node table is explained in Section 5.8.1.) If you use the format that does not specify this parameter, a node table named _NODE$ is created. node_cost_column Name of the cost column in the node table. (The node table is explained in Section 5.8.1.) If you use the format that does not specify this parameter, the geometry column is named COST. link_table_name Name of the link table to be created. (The link table is explained in Section 5.8.2.) If you use the format that does not specify this parameter, a link table named _LINK$ is created. link_cost_column Name of the cost column in the link table. (The link table is explained in Section 5.8.2.) If you use the format that does not specify this parameter, the geometry column is named COST. path_table_name Name of the path table to be created. (The path table is explained in Section 5.8.3.) If you use the format that does not specify this parameter, a path table named _PATH$ is created. path_geom_column Name of the geometry column in the path table. (The path table is explained in Section 5.8.3.) If you use the format that does not specify this parameter, the geometry column is named GEOMETRY. path_link_table_name Name of the path-link table to be created. (The path-link table is explained in Section 5.8.4.) If you use the format that does not specify this parameter, a path-link table named _PLINK$ is created. Usage Notes This procedure provides a convenient way to create a spatial network when the node, link, and optional related tables do not already exist. The procedure creates the network; creates the node, link, path, and path-link tables for the network; and inserts the appropriate information in the xxx_SDO_NETWORK_METADATA views (described in Section 5.9.1). The node and link tables contain a topology geometry column named TOPO_GEOMETRY of type SDO_TOPO_GEOMETRY. An exception is generated if any of the tables to be created already exists. The procedure has two formats. The simpler format creates the tables using default values for the table name and the geometry and cost column names. The other format lets you specify names for the tables and the geometry and cost columns. As an alternative to using this procedure, you can create the network using the SDO_ NET.CREATE_TOPO_NETWORK procedure; create the tables using the SDO_ NET.CREATE_NODE_TABLE, SDO_NET.CREATE_LINK_TABLE, SDO_ NET.CREATE_PATH_TABLE, and SDO_NET.CREATE_PATH_LINK_TABLE procedures; and insert the appropriate row in the USER_SDO_NETWORK_ METADATA view. SDO_NET Package Subprograms 6-17 SDO_NET.CREATE_TOPO_NETWORK Examples The following example creates a directed spatial topology geometry network named TOPO_NET1. The example creates the TOPO_NET1_NODE$, TOPO_NET1_LINK$, TOPO_NET1_PATH$, and TOPO_NET1_PLINK$ tables, and updates the xxx_SDO_ NETWORK_METADATA views. The topology geometry columns are named TOPO_ GEOMETRY. Both the node and link tables contain a cost column named COST. EXECUTE SDO_NET.CREATE_TOPO_NETWORK('TOPO_NET1', 1, TRUE, TRUE); 6-18 Oracle Spatial Topology and Network Data Models SDO_NET.DROP_NETWORK SDO_NET.DROP_NETWORK Format SDO_NET.DROP_NETWORK( network IN VARCHAR2); Description Drops (deletes) a network. Parameters network Name of the network to be dropped. Usage Notes This procedure also deletes the node, link, and path tables associated with the network, and the network metadata for the network. Examples The following example drops the network named ROADS_NETWORK. EXECUTE SDO_NET.DROP_NETWORK('ROADS_NETWORK'); SDO_NET Package Subprograms 6-19 SDO_NET.GET_CHILD_LINKS SDO_NET.GET_CHILD_LINKS Format SDO_NET.GET_CHILD_LINKS( network IN VARCHAR2, link_id IN NUMBER ) RETURN SDO_NUMBER_ARRAY; Description Returns the child links of a link. Parameters network Network name. link_id ID of the link for which to return the child links. Usage Notes For information about parent and child nodes and links in a network hierarchy, see Section 5.5. Examples The following example returns the child links of the link in the XYZ_NETWORK network whose link ID is 1001. SELECT SDO_NET.GET_CHILD_LINKS('XYZ_NETWORK', 1001) FROM DUAL; SDO_NET.GET_CHILD_LINKS('XYZ_NETWORK',1001) -------------------------------------------------------------------------------SDO_NUMBER_ARRAY(1108, 1109) 6-20 Oracle Spatial Topology and Network Data Models SDO_NET.GET_CHILD_NODES SDO_NET.GET_CHILD_NODES Format SDO_NET.GET_CHILD_NODES( network IN VARCHAR2, node_id IN NUMBER ) RETURN SDO_NUMBER_ARRAY; Description Returns the child nodes of a node. Parameters network Network name. node_id ID of the node for which to return the child nodes. Usage Notes For information about parent and child nodes and links in a network hierarchy, see Section 5.5. Examples The following example returns the child nodes of the node in the XYZ_NETWORK network whose node ID is 1. SELECT SDO_NET.GET_CHILD_NODES('XYZ_NETWORK', 1) FROM DUAL; SDO_NET.GET_CHILD_NODES('XYZ_NETWORK',1) -------------------------------------------------------------------------------SDO_NUMBER_ARRAY(101, 102, 103, 104, 105, 106) SDO_NET Package Subprograms 6-21 SDO_NET.GET_GEOMETRY_TYPE SDO_NET.GET_GEOMETRY_TYPE Format SDO_NET.GET_GEOMETRY_TYPE( network IN VARCHAR2 ) RETURN VARCHAR2; Description Returns the geometry type for a spatial network. Parameters network Network name. Usage Notes This function returns the value of the GEOMETRY_TYPE column for the network in the USER_SDO_NETWORK_METADATA view (see Table 5–5 in Section 5.9.1). Examples The following example returns the geometry type for the network named ROADS_ NETWORK. SELECT SDO_NET.GET_GEOMETRY_TYPE('ROADS_NETWORK') FROM DUAL; SDO_NET.GET_GEOMETRY_TYPE('ROADS_NETWORK') -------------------------------------------------------------------------------LRS_GEOMETRY 6-22 Oracle Spatial Topology and Network Data Models SDO_NET.GET_IN_LINKS SDO_NET.GET_IN_LINKS Format SDO_NET.GET_IN_LINKS( network IN VARCHAR2, node_id IN NUMBER ) RETURN SDO_NUMBER_ARRAY; Description Returns an array of link ID numbers of the inbound links to a node. Parameters network Network name. node_id ID of the node for which to return the array of inbound links. Usage Notes For information about inbound links and related network data model concepts, see Section 5.3. Examples The following example returns an array of link ID numbers of the inbound links into the node whose node ID is 3 in the network named ROADS_NETWORK. SELECT SDO_NET.GET_IN_LINKS('ROADS_NETWORK', 3) FROM DUAL; SDO_NET.GET_IN_LINKS('ROADS_NETWORK',3) -------------------------------------------------------------------------------SDO_NUMBER_ARRAY(102) SDO_NET Package Subprograms 6-23 SDO_NET.GET_LINK_COST_COLUMN SDO_NET.GET_LINK_COST_COLUMN Format SDO_NET.GET_LINK_COST_COLUMN( network IN VARCHAR2 ) RETURN VARCHAR2; Description Returns the name of the link cost column for a network. Parameters network Network name. Usage Notes This function returns the value of the LINK_COST_COLUMN column for the network in the USER_SDO_NETWORK_METADATA view (see Table 5–5 in Section 5.9.1). Examples The following example returns the name of the link cost column for the network named ROADS_NETWORK. SELECT SDO_NET.GET_LINK_COST_COLUMN('ROADS_NETWORK') FROM DUAL; SDO_NET.GET_LINK_COST_COLUMN('ROADS_NETWORK') -------------------------------------------------------------------------------COST 6-24 Oracle Spatial Topology and Network Data Models SDO_NET.GET_LINK_DIRECTION SDO_NET.GET_LINK_DIRECTION Format SDO_NET.GET_LINK_DIRECTION( network IN VARCHAR2 ) RETURN VARCHAR2; Description Returns the link direction for a network. Parameters network Network name. Usage Notes This function returns the value of the LINK_DIRECTION column for the network in the USER_SDO_NETWORK_METADATA view (see Table 5–5 in Section 5.9.1). Examples The following example returns the link direction for the network named ROADS_ NETWORK. SELECT SDO_NET.GET_LINK_DIRECTION('ROADS_NETWORK') FROM DUAL; SDO_NET.GET_LINK_DIRECTION('ROADS_NETWORK') -------------------------------------------------------------------------------DIRECTED SDO_NET Package Subprograms 6-25 SDO_NET.GET_LINK_GEOM_COLUMN SDO_NET.GET_LINK_GEOM_COLUMN Format SDO_NET.GET_LINK_GEOM_COLUMN( network IN VARCHAR2 ) RETURN VARCHAR2; Description Returns the name of the link geometry column for a spatial network. Parameters network Network name. Usage Notes This function returns the value of the LINK_GEOM_COLUMN column for the network in the USER_SDO_NETWORK_METADATA view (see Table 5–5 in Section 5.9.1). Examples The following example returns the name of the link geometry column for the network named ROADS_NETWORK. SELECT SDO_NET.GET_LINK_GEOM_COLUMN('ROADS_NETWORK') FROM DUAL; SDO_NET.GET_LINK_GEOM_COLUMN('ROADS_NETWORK') -------------------------------------------------------------------------------LINK_GEOMETRY 6-26 Oracle Spatial Topology and Network Data Models SDO_NET.GET_LINK_GEOMETRY SDO_NET.GET_LINK_GEOMETRY Format SDO_NET.GET_LINK_GEOMETRY( network IN VARCHAR2, link_id IN NUMBER ) RETURN SDO_GEOMETRY; Description Returns the geometry associated with a link in a spatial network. Parameters network Network name. link_id ID number of the link for which to return the geometry. Usage Notes None. Examples The following example returns the geometry associated with the link whose link ID is 103 in the network named ROADS_NETWORK. SELECT SDO_NET.GET_LINK_GEOMETRY('ROADS_NETWORK', 103) FROM DUAL; SDO_NET.GET_LINK_GEOMETRY('ROADS_NETWORK',103)(SDO_GTYPE, SDO_SRID, SDO_POINT(X, -------------------------------------------------------------------------------SDO_GEOMETRY(2002, NULL, NULL, SDO_ELEM_INFO_ARRAY(1, 2, 1), SDO_ORDINATE_ARRAY( 8, 4, 12, 4)) SDO_NET Package Subprograms 6-27 SDO_NET.GET_LINK_TABLE_NAME SDO_NET.GET_LINK_TABLE_NAME Format SDO_NET.GET_LINK_TABLE_NAME( network IN VARCHAR2 ) RETURN VARCHAR2; Description Returns the name of the link table for a network. Parameters network Network name. Usage Notes This function returns the value of the LINK_TABLE_NAME column for the network in the USER_SDO_NETWORK_METADATA view (see Table 5–5 in Section 5.9.1). Examples The following example returns the name of the link table for the network named ROADS_NETWORK. SELECT SDO_NET.GET_LINK_TABLE_NAME('ROADS_NETWORK') FROM DUAL; SDO_NET.GET_LINK_TABLE_NAME('ROADS_NETWORK') -------------------------------------------------------------------------------ROADS_LINKS 6-28 Oracle Spatial Topology and Network Data Models SDO_NET.GET_LRS_GEOM_COLUMN SDO_NET.GET_LRS_GEOM_COLUMN Format SDO_NET.GET_LRS_GEOM_COLUMN( network IN VARCHAR2 ) RETURN VARCHAR2; Description Returns the name of the LRS geometry column for a spatial network. Parameters network Network name. Usage Notes This function returns the value of the LRS_GEOM_COLUMN column for the network in the USER_SDO_NETWORK_METADATA view (see Table 5–5 in Section 5.9.1). Examples The following example returns the name of the LRS geometry column for the network named ROADS_NETWORK. SELECT SDO_NET.GET_LRS_GEOM_COLUMN('ROADS_NETWORK') FROM DUAL; SDO_NET.GET_LRS_GEOM_COLUMN('ROADS_NETWORK') -------------------------------------------------------------------------------ROAD_GEOM SDO_NET Package Subprograms 6-29 SDO_NET.GET_LRS_LINK_GEOMETRY SDO_NET.GET_LRS_LINK_GEOMETRY Format SDO_NET.GET_LRS_LINK_GEOMETRY( network IN VARCHAR2, link_id IN NUMBER ) RETURN SDO_GEOMETRY; Description Returns the LRS geometry associated with a link in a spatial LRS network. Parameters network Network name. link_id ID number of the link for which to return the geometry. Usage Notes None. Examples The following example returns the LRS geometry associated with the link whose link ID is 103 in the network named ROADS_NETWORK. SELECT SDO_NET.GET_LRS_LINK_GEOMETRY('ROADS_NETWORK', 103) FROM DUAL; SDO_NET.GET_LRS_LINK_GEOMETRY('ROADS_NETWORK',103)(SDO_GTYPE, SDO_SRID, SDO_POIN -------------------------------------------------------------------------------SDO_GEOMETRY(2002, NULL, NULL, SDO_ELEM_INFO_ARRAY(1, 2, 1), SDO_ORDINATE_ARRAY( 8, 4, 12, 4)) 6-30 Oracle Spatial Topology and Network Data Models SDO_NET.GET_LRS_NODE_GEOMETRY SDO_NET.GET_LRS_NODE_GEOMETRY Format SDO_NET.GET_LRS_NODE_GEOMETRY( network IN VARCHAR2, node_id IN NUMBER ) RETURN SDO_GEOMETRY; Description Returns the LRS geometry associated with a node in a spatial LRS network. Parameters network Network name. node_id ID number of the node for which to return the geometry. Usage Notes None. Examples The following example returns the LRS geometry associated with the node whose node ID is 3 in the network named ROADS_NETWORK. SELECT SDO_NET.GET_LRS_NODE_GEOMETRY('ROADS_NETWORK', 3) FROM DUAL; SDO_NET.GET_LRS_NODE_GEOMETRY('ROADS_NETWORK',3)(SDO_GTYPE, SDO_SRID, SDO_POINT( -------------------------------------------------------------------------------SDO_GEOMETRY(2001, NULL, SDO_POINT_TYPE(8, 4, NULL), NULL, NULL) SDO_NET Package Subprograms 6-31 SDO_NET.GET_LRS_TABLE_NAME SDO_NET.GET_LRS_TABLE_NAME Format SDO_NET.GET_LRS_TABLE_NAME( network IN VARCHAR2 ) RETURN VARCHAR2; Description Returns the name of the table containing LRS geometries in a spatial LRS network. Parameters network Network name. Usage Notes This function returns the value of the LRS_TABLE_NAME column for the network in the USER_SDO_NETWORK_METADATA view (see Table 5–5 in Section 5.9.1). Examples The following example returns the name of the table that contains LRS geometries for the network named ROADS_NETWORK. SELECT SDO_NET.GET_LRS_TABLE_NAME('ROADS_NETWORK') FROM DUAL; SDO_NET.GET_LRS_TABLE_NAME('ROADS_NETWORK') -------------------------------------------------------------------------------ROADS 6-32 Oracle Spatial Topology and Network Data Models SDO_NET.GET_NETWORK_TYPE SDO_NET.GET_NETWORK_TYPE Format SDO_NET.GET_NETWORK_TYPE( network IN VARCHAR2 ) RETURN VARCHAR2; Description Returns the network type. Parameters network Network name. Usage Notes This function returns the value of the NETWORK_TYPE column for the network in the USER_SDO_NETWORK_METADATA view (see Table 5–5 in Section 5.9.1). Examples The following example returns the network type for the network named ROADS_ NETWORK. SELECT SDO_NET.GET_NETWORK_TYPE('ROADS_NETWORK') FROM DUAL; SDO_NET.GET_NETWORK_TYPE('ROADS_NETWORK') -------------------------------------------------------------------------------Roadways SDO_NET Package Subprograms 6-33 SDO_NET.GET_NO_OF_HIERARCHY_LEVELS SDO_NET.GET_NO_OF_HIERARCHY_LEVELS Format SDO_NET.GET_NO_OF_HIERARCHY_LEVELS( network IN VARCHAR2 ) RETURN NUMBER; Description Returns the number of hierarchy levels for a network. Parameters network Network name. Usage Notes This function returns the value of the NO_OF_HIERARCHY_LEVELS column for the network in the USER_SDO_NETWORK_METADATA view (see Table 5–5 in Section 5.9.1). For an explanation of network hierarchy, see Section 5.5. Examples The following example returns the number of hierarchy levels for the network named ROADS_NETWORK. SELECT SDO_NET.GET_NO_OF_HIERARCHY_LEVELS('ROADS_NETWORK') FROM DUAL; SDO_NET.GET_NO_OF_HIERARCHY_LEVELS('ROADS_NETWORK') --------------------------------------------------1 6-34 Oracle Spatial Topology and Network Data Models SDO_NET.GET_NO_OF_LINKS SDO_NET.GET_NO_OF_LINKS Format SDO_NET.GET_NO_OF_LINKS( network IN VARCHAR2 ) RETURN NUMBER; or SDO_NET.GET_NO_OF_LINKS( network IN VARCHAR2, hierarchy_id IN NUMBER ) RETURN NUMBER; Description Returns the number of links for a network or a hierarchy level in a network. Parameters network Network name. hierarchy_id Hierarchy level number for which to return the number of links. Usage Notes None. Examples The following example returns the number of links in the network named ROADS_ NETWORK. SELECT SDO_NET.GET_NO_OF_LINKS('ROADS_NETWORK') FROM DUAL; SDO_NET.GET_NO_OF_LINKS('ROADS_NETWORK') ---------------------------------------10 SDO_NET Package Subprograms 6-35 SDO_NET.GET_NO_OF_NODES SDO_NET.GET_NO_OF_NODES Format SDO_NET.GET_NO_OF_NODES( network IN VARCHAR2 ) RETURN NUMBER; or SDO_NET.GET_NO_OF_NODES( network IN VARCHAR2, hierarchy_id IN NUMBER ) RETURN NUMBER; Description Returns the number of nodes for a network or a hierarchy level in a network. Parameters network Network name. hierarchy_id Hierarchy level number for which to return the number of nodes. Usage Notes For information about nodes and related concepts, see Section 5.3. Examples The following example returns the number of nodes in the network named ROADS_ NETWORK. SELECT SDO_NET.GET_NO_OF_NODES('ROADS_NETWORK') FROM DUAL; SDO_NET.GET_NO_OF_NODES('ROADS_NETWORK') ---------------------------------------8 6-36 Oracle Spatial Topology and Network Data Models SDO_NET.GET_NODE_DEGREE SDO_NET.GET_NODE_DEGREE Format SDO_NET.GET_NODE_DEGREE( network IN VARCHAR2, node_id IN NUMBER ) RETURN NUMBER; Description Returns the number of links to a node. Parameters network Network name. node_id Node ID of the node for which to return the number of links. Usage Notes For information about node degree and related network data model concepts, see Section 5.3. Examples The following example returns the number of links to the node whose node ID is 3 in the network named ROADS_NETWORK. SELECT SDO_NET.GET_NODE_DEGREE('ROADS_NETWORK', 3) FROM DUAL; SDO_NET.GET_NODE_DEGREE('ROADS_NETWORK',3) -----------------------------------------3 SDO_NET Package Subprograms 6-37 SDO_NET.GET_NODE_GEOM_COLUMN SDO_NET.GET_NODE_GEOM_COLUMN Format SDO_NET.GET_NODE_GEOM_COLUMN( network IN VARCHAR2 ) RETURN VARCHAR2; Description Returns the name of the geometry column for nodes in a spatial network. Parameters network Network name. Usage Notes This function returns the value of the NODE_GEOM_COLUMN column for the network in the USER_SDO_NETWORK_METADATA view (see Table 5–5 in Section 5.9.1). Examples The following example returns the name of the geometry column for nodes in the network named ROADS_NETWORK. SELECT SDO_NET.GET_NODE_GEOM_COLUMN('ROADS_NETWORK') FROM DUAL; SDO_NET.GET_NODE_GEOM_COLUMN('ROADS_NETWORK') -------------------------------------------------------------------------------NODE_GEOMETRY 6-38 Oracle Spatial Topology and Network Data Models SDO_NET.GET_NODE_GEOMETRY SDO_NET.GET_NODE_GEOMETRY Format SDO_NET.GET_NODE_GEOMETRY( network IN VARCHAR2, node_id IN NUMBER ) RETURN SDO_GEOMETRY; Description Returns the LRS geometry associated with a node in a spatial network. Parameters network Network name. node_id ID number of the node for which to return the geometry. Usage Notes None. Examples The following example returns the geometry associated with the node whose node ID is 3 in the network named ROADS_NETWORK. SELECT SDO_NET.GET_NODE_GEOMETRY('ROADS_NETWORK', 3) FROM DUAL; SDO_NET.GET_NODE_GEOMETRY('ROADS_NETWORK',3)(SDO_GTYPE, SDO_SRID, SDO_POINT(X, Y -------------------------------------------------------------------------------SDO_GEOMETRY(2001, NULL, SDO_POINT_TYPE(8, 4, NULL), NULL, NULL) SDO_NET Package Subprograms 6-39 SDO_NET.GET_NODE_IN_DEGREE SDO_NET.GET_NODE_IN_DEGREE Format SDO_NET.GET_NODE_IN_DEGREE( network IN VARCHAR2, node_id IN NUMBER ) RETURN NUMBER; Description Returns the number of inbound links to a node. Parameters network Network name. node_id Node ID of the node for which to return the number of inbound links. Usage Notes For information about node degree and related network data model concepts, see Section 5.3. Examples The following example returns the number of inbound links to the node whose node ID is 3 in the network named ROADS_NETWORK. SELECT SDO_NET.GET_NODE_IN_DEGREE('ROADS_NETWORK', 3) FROM DUAL; SDO_NET.GET_NODE_IN_DEGREE('ROADS_NETWORK',3) --------------------------------------------1 6-40 Oracle Spatial Topology and Network Data Models SDO_NET.GET_NODE_OUT_DEGREE SDO_NET.GET_NODE_OUT_DEGREE Format SDO_NET.GET_NODE_OUT_DEGREE( network IN VARCHAR2, node_id IN NUMBER ) RETURN NUMBER; Description Returns the number of outbound links from a node. Parameters network Network name. node_id Node ID of the node for which to return the number of outbound links. Usage Notes For information about node degree and related network data model concepts, see Section 5.3. Examples The following example returns the number of outbound links from the node whose node ID is 3 in the network named ROADS_NETWORK. SELECT SDO_NET.GET_NODE_OUT_DEGREE('ROADS_NETWORK', 3) FROM DUAL; SDO_NET.GET_NODE_OUT_DEGREE('ROADS_NETWORK',3) ---------------------------------------------2 SDO_NET Package Subprograms 6-41 SDO_NET.GET_NODE_TABLE_NAME SDO_NET.GET_NODE_TABLE_NAME Format SDO_NET.GET_NODE_TABLE_NAME( network IN VARCHAR2 ) RETURN VARCHAR2; Description Returns the name of the table that contains the nodes in a spatial network. Parameters network Network name. Usage Notes This function returns the value of the NODE_TABLE_NAME column for the network in the USER_SDO_NETWORK_METADATA view (see Table 5–5 in Section 5.9.1). Examples The following example returns the name of the table that contains the nodes in the network named ROADS_NETWORK. SELECT SDO_NET.GET_NODE_TABLE_NAME('ROADS_NETWORK') FROM DUAL; SDO_NET.GET_NODE_TABLE_NAME('ROADS_NETWORK') -------------------------------------------------------------------------------ROADS_NODES 6-42 Oracle Spatial Topology and Network Data Models SDO_NET.GET_OUT_LINKS SDO_NET.GET_OUT_LINKS Format SDO_NET.GET_OUT_LINKS( network IN VARCHAR2, node_id IN NUMBER ) RETURN SDO_NUMBER_ARRAY; Description Returns an array of link ID numbers of the outbound links from a node. Parameters network Network name. node_id ID of the node for which to return the array of outbound links. Usage Notes For information about outbound links and related network data model concepts, see Section 5.3. Examples The following example returns an array of link ID numbers of the outbound links from the node whose node ID is 3 in the network named ROADS_NETWORK. SELECT SDO_NET.GET_OUT_LINKS('ROADS_NETWORK', 3) FROM DUAL; SDO_NET.GET_OUT_LINKS('ROADS_NETWORK',3) -------------------------------------------------------------------------------SDO_NUMBER_ARRAY(103, 201) SDO_NET Package Subprograms 6-43 SDO_NET.GET_PATH_GEOM_COLUMN SDO_NET.GET_PATH_GEOM_COLUMN Format SDO_NET.GET_PATH_GEOM_COLUMN( network IN VARCHAR2 ) RETURN VARCHAR2; Description Returns the name of the geometry column for paths in a spatial network. Parameters network Network name. Usage Notes This function returns the value of the PATH_GEOM_COLUMN column for the network in the USER_SDO_NETWORK_METADATA view (see Table 5–5 in Section 5.9.1). Examples The following example returns the name of the geometry column for paths in the network named ROADS_NETWORK. SELECT SDO_NET.GET_PATH_GEOM_COLUMN('ROADS_NETWORK') FROM DUAL; SDO_NET.GET_PATH_GEOM_COLUMN('ROADS_NETWORK') -------------------------------------------------------------------------------PATH_GEOMETRY 6-44 Oracle Spatial Topology and Network Data Models SDO_NET.GET_PATH_TABLE_NAME SDO_NET.GET_PATH_TABLE_NAME Format SDO_NET.GET_PATH_TABLE_NAME( network IN VARCHAR2 ) RETURN VARCHAR2; Description Returns the name of the table that contains the paths in a spatial network. Parameters network Network name. Usage Notes This function returns the value of the PATH_TABLE_NAME column for the network in the USER_SDO_NETWORK_METADATA view (see Table 5–5 in Section 5.9.1). Examples The following example returns the name of the table that contains the paths in the network named ROADS_NETWORK. SELECT SDO_NET.GET_PATH_TABLE_NAME('ROADS_NETWORK') FROM DUAL; SDO_NET.GET_PATH_TABLE_NAME('ROADS_NETWORK') -------------------------------------------------------------------------------ROADS_PATHS SDO_NET Package Subprograms 6-45 SDO_NET.IS_HIERARCHICAL SDO_NET.IS_HIERARCHICAL Format SDO_NET.IS_HIERARCHICAL( network IN VARCHAR2 ) RETURN VARCHAR2; Description Returns TRUE if the network has more than one level of hierarchy; returns FALSE if the network does not have more than one level of hierarchy. Parameters network Network name. Usage Notes For an explanation of network hierarchy, see Section 5.5. Examples The following example checks if the network named ROADS_NETWORK has more than one level of hierarchy. SELECT SDO_NET.IS_HIERARCHICAL('ROADS_NETWORK') FROM DUAL; SDO_NET.IS_HIERARCHICAL('ROADS_NETWORK') -------------------------------------------------------------------------------TRUE 6-46 Oracle Spatial Topology and Network Data Models SDO_NET.IS_LOGICAL SDO_NET.IS_LOGICAL Format SDO_NET.IS_LOGICAL( network IN VARCHAR2 ) RETURN VARCHAR2; Description Returns TRUE if the network is a logical network; returns FALSE if the network is not a logical network. Parameters network Network name. Usage Notes A network can be a spatial network or a logical network, as explained in Section 5.3. Examples The following example checks if the network named ROADS_NETWORK is a logical network. SELECT SDO_NET.IS_LOGICAL('ROADS_NETWORK') FROM DUAL; SDO_NET.IS_LOGICAL('ROADS_NETWORK') -------------------------------------------------------------------------------FALSE SDO_NET Package Subprograms 6-47 SDO_NET.IS_SPATIAL SDO_NET.IS_SPATIAL Format SDO_NET.IS_SPATIAL( network IN VARCHAR2 ) RETURN VARCHAR2; Description Returns TRUE if the network is a spatial network; returns FALSE if the network is not a spatial network. Parameters network Network name. Usage Notes A network can be a spatial network or a logical network, as explained in Section 5.3. You can further check for the geometry type of a spatial network by using the following functions: SDO_NET.LRS_GEOMETRY_NETWORK, SDO_NET.SDO_ GEOMETRY_NETWORK, and SDO_NET.TOPO_GEOMETRY_NETWORK. Examples The following example checks if the network named ROADS_NETWORK is a spatial network. SELECT SDO_NET.IS_SPATIAL('ROADS_NETWORK') FROM DUAL; SDO_NET.IS_SPATIAL('ROADS_NETWORK') -------------------------------------------------------------------------------TRUE 6-48 Oracle Spatial Topology and Network Data Models SDO_NET.LRS_GEOMETRY_NETWORK SDO_NET.LRS_GEOMETRY_NETWORK Format SDO_NET.LRS_GEOMETRY_NETWORK( network IN VARCHAR2 ) RETURN VARCHAR2; Description Returns TRUE if the network is a spatial network containing LRS geometries; returns FALSE if the network is not a spatial network containing LRS geometries. Parameters network Network name. Usage Notes A network contains LRS geometries if the GEOMETRY_TYPE column in its entry in the USER_SDO_NETWORK_METADATA view contains the value LRS_GEOMETRY. (The USER_SDO_NETWORK_METADATA view is explained in Section 5.9.1.) Examples The following example checks if the network named ROADS_NETWORK is a spatial network containing LRS geometries. SELECT SDO_NET.LRS_GEOMETRY_NETWORK('ROADS_NETWORK') FROM DUAL; SDO_NET.LRS_GEOMETRY_NETWORK('ROADS_NETWORK') -------------------------------------------------------------------------------TRUE SDO_NET Package Subprograms 6-49 SDO_NET.NETWORK_EXISTS SDO_NET.NETWORK_EXISTS Format SDO_NET.NETWORK_EXISTS( network IN VARCHAR2 ) RETURN VARCHAR2; Description Returns TRUE if the network exists; returns FALSE if the network does not exist. Parameters network Network name. Usage Notes If you drop a network (using the SDO_NET.DROP_NETWORK procedure), the network no longer exists. Examples The following example checks if the network named ROADS_NETWORK exists. SELECT SDO_NET.NETWORK_EXISTS('ROADS_NETWORK') FROM DUAL; SDO_NET.NETWORK_EXISTS('ROADS_NETWORK') -------------------------------------------------------------------------------TRUE 6-50 Oracle Spatial Topology and Network Data Models SDO_NET.SDO_GEOMETRY_NETWORK SDO_NET.SDO_GEOMETRY_NETWORK Format SDO_NET.SDO_GEOMETRY_NETWORK( network IN VARCHAR2 ) RETURN VARCHAR2; Description Returns TRUE if the network is a spatial network containing SDO geometries (spatial geometries without measure information); returns FALSE if the network is not a spatial network containing SDO geometries. Parameters network Network name. Usage Notes A network contains SDO geometries if the GEOMETRY_TYPE column in its entry in the USER_SDO_NETWORK_METADATA view contains the value SDO_GEOMETRY. (The USER_SDO_NETWORK_METADATA view is explained in Section 5.9.1.) Examples The following example checks if the network named ROADS_NETWORK is a spatial network containing SDO geometries. SELECT SDO_NET.SDO_GEOMETRY_NETWORK('ROADS_NETWORK') FROM DUAL; SDO_NET.SDO_GEOMETRY_NETWORK('ROADS_NETWORK') -------------------------------------------------------------------------------FALSE SDO_NET Package Subprograms 6-51 SDO_NET.TOPO_GEOMETRY_NETWORK SDO_NET.TOPO_GEOMETRY_NETWORK Format SDO_NET.TOPO_GEOMETRY_NETWORK( network IN VARCHAR2 ) RETURN VARCHAR2; Description Returns TRUE if the network is a spatial network containing SDO_TOPO_GEOMETRY (topology geometry) objects; returns FALSE if the network is not a spatial network containing SDO_TOPO_GEOMETRY objects. Parameters network Network name. Usage Notes A network contains SDO_TOPO_GEOMETRY objects if the GEOMETRY_TYPE column in its entry in the USER_SDO_NETWORK_METADATA view contains the value TOPO_GEOMETRY. (The USER_SDO_NETWORK_METADATA view is explained in Section 5.9.1.) Examples The following example checks if the network named ROADS_NETWORK is a spatial network containing SDO_TOPO_GEOMETRY objects. SELECT SDO_NET.TOPO_GEOMETRY_NETWORK('ROADS_NETWORK') FROM DUAL; SDO_NET.TOPO_GEOMETRY_NETWORK('ROADS_NETWORK') -------------------------------------------------------------------------------FALSE 6-52 Oracle Spatial Topology and Network Data Models SDO_NET.VALIDATE_LINK_SCHEMA SDO_NET.VALIDATE_LINK_SCHEMA Format SDO_NET.VALIDATE_LINK_SCHEMA( network IN VARCHAR2 ) RETURN VARCHAR2; Description Returns TRUE if the metadata relating to links in a network is valid; returns FALSE if the metadata relating to links in a network is not valid. Parameters network Network name. Usage Notes This function checks the following for validity: table name, geometry column, and cost column for spatial networks; measure-related information for LRS networks; topology-related information for topology networks; and hierarchy-related information for hierarchical networks. Examples The following example checks the validity of the metadata related to links in the network named ROADS_NETWORK. SELECT SDO_NET.VALIDATE_LINK_SCHEMA('ROADS_NETWORK') FROM DUAL; SDO_NET.VALIDATE_LINK_SCHEMA('ROADS_NETWORK') -------------------------------------------------------------------------------TRUE SDO_NET Package Subprograms 6-53 SDO_NET.VALIDATE_LRS_SCHEMA SDO_NET.VALIDATE_LRS_SCHEMA Format SDO_NET.VALIDATE_LRS_SCHEMA( network IN VARCHAR2 ) RETURN VARCHAR2; Description Returns TRUE if the metadata relating to LRS information in a network is valid; returns FALSE if the metadata relating to LRS information in a network is not valid. Parameters network Network name. Usage Notes None. Examples The following example checks the validity of the metadata related to LRS information in the network named ROADS_NETWORK. SELECT SDO_NET.VALIDATE_LRS_SCHEMA('ROADS_NETWORK') FROM DUAL; SDO_NET.VALIDATE_LRS_SCHEMA('ROADS_NETWORK') -------------------------------------------------------------------------------TRUE 6-54 Oracle Spatial Topology and Network Data Models SDO_NET.VALIDATE_NETWORK SDO_NET.VALIDATE_NETWORK Format SDO_NET.VALIDATE_NETWORK( network IN VARCHAR2 ) RETURN VARCHAR2; Description Returns TRUE if the network is valid; returns FALSE if the network is not valid. Parameters network Network name. Usage Notes This function checks for the following, and returns FALSE if one or more are not true: ■ ■ ■ ■ The network exists. The node and link tables for the network exist, and they contain the required columns. For an LRS geometry network, the LRS table exists and contains the required columns. For a spatial network, columns for the node and path geometries exist and have spatial indexes defined on them. Examples The following example validates the network named LOG_NET1. SELECT SDO_NET.VALIDATE_NETWORK('LOG_NET1') FROM DUAL; SDO_NET.VALIDATE_NETWORK('LOG_NET1') -------------------------------------------------------------------------------TRUE SDO_NET Package Subprograms 6-55 SDO_NET.VALIDATE_NODE_SCHEMA SDO_NET.VALIDATE_NODE_SCHEMA Format SDO_NET.VALIDATE_NODE_SCHEMA( network IN VARCHAR2 ) RETURN VARCHAR2; Description Returns TRUE if the metadata relating to nodes in a network is valid; returns FALSE if the metadata relating to nodes in a network is not valid. Parameters network Network name. Usage Notes This function checks the following for validity: table name, geometry column, and cost column for spatial networks; measure-related information for LRS networks; topology-related information for topology networks; and hierarchy-related information for hierarchical networks. Examples The following example checks the validity of the metadata related to nodes in the network named LOG_NET1. SELECT SDO_NET.VALIDATE_NODE_SCHEMA('LOG_NET1') FROM DUAL; SDO_NET.VALIDATE_NODE_SCHEMA('LOG_NET1') -------------------------------------------------------------------------------TRUE 6-56 Oracle Spatial Topology and Network Data Models SDO_NET.VALIDATE_PATH_SCHEMA SDO_NET.VALIDATE_PATH_SCHEMA Format SDO_NET.VALIDATE_PATH_SCHEMA( network IN VARCHAR2 ) RETURN VARCHAR2; Description Returns TRUE if the metadata relating to paths in a network is valid; returns FALSE if the metadata relating to paths in a network is not valid. Parameters network Network name. Usage Notes This function checks the following for validity: table name, geometry column, and cost column for spatial networks; measure-related information for LRS networks; topology-related information for topology networks; and hierarchy-related information for hierarchical networks. Examples The following example checks the validity of the metadata related to paths in the network named ROADS_NETWORK. SELECT SDO_NET.VALIDATE_PATH_SCHEMA('ROADS_NETWORK') FROM DUAL; SDO_NET.VALIDATE_PATH_SCHEMA('ROADS_NETWORK') -------------------------------------------------------------------------------TRUE SDO_NET Package Subprograms 6-57 SDO_NET.VALIDATE_PATH_SCHEMA 6-58 Oracle Spatial Topology and Network Data Models 7 SDO_NET_MEM Package Subprograms The MDSYS.SDO_NET_MEM package contains subprograms (functions and procedures) that constitute part of the PL/SQL application programming interface (API) for the Spatial network data model. This package, which implements capabilities available through the Java API, contains subprograms related to editing and analyzing networks. Although this manual refers to "the SDO_NET_MEM package," the subprograms are actually implemented as methods of several object types. Thus, they are not listed by the statement DESCRIBE SDO_NET_MEM. Note: To use the subprograms in this chapter, you must understand the conceptual information about networks in Chapter 5, especially Section 5.7, which explains how to use a network memory object. The SDO_NET_MEM subprograms are grouped according to their associated object-related class in the oracle.spatial.network interface or class. Except for the SDO_ NET_MEM.SET_MAX_MEMORY_SIZE procedure, you must specify a prefix after SDO_NET_MEM for each program, depending on its associated class (for example, SDO_NET_MEM.NETWORK_MANAGER.CREATE_LOGICAL_NETWORK, SDO_ NET_MEM.NETWORK.ADD_NODE, and SDO_NET_MEM.NODE.GET_COST). The SDO_NET_MEM subprogram groupings are as follows: ■ ■ ■ ■ ■ SDO_NET_MEM.NETWORK_MANAGER subprograms are related to the oracle.spatial.network.NetworkManager Java class. They enable you to create and drop network memory objects and to perform network analysis. SDO_NET_MEM.NETWORK subprograms are related to the oracle.spatial.network.Network Java interface. They enable you to add and delete nodes, links, and paths. SDO_NET_MEM.NODE subprograms are related to the oracle.spatial.network.Node Java interface. They enable you to get and set attributes for nodes. SDO_NET_MEM.LINK subprograms are related to the oracle.spatial.network.Link Java interface. They enable you to get and set attributes for links. SDO_NET_MEM.PATH subprograms are related to the oracle.spatial.network.Path Java interface. They enable you to get and set attributes for paths. SDO_NET_MEM Package Subprograms 7-1 The associations between SDO_NET_MEM subprograms and methods of the Java API are not necessarily exact. In some cases, a PL/SQL subprogram may combine operations and options from several methods. In addition, some Java methods do not have PL/SQL counterparts. Thus, the Usage Notes for subprograms state only that the function or procedure is analogous to a specific Java method, to indicate a logical relationship between the two. For detailed information about a specific Java method and others that may be related, see the Javadoc-generated API documentation (briefly explained in Section 5.10.2). The rest of this chapter provides reference information about the SDO_NET_MEM subprograms, listed in alphabetical order (by grouping, then by name within each grouping), with the SDO_NET_MEM.SET_MAX_MEMORY_SIZE procedure listed first because it does not fit in any grouping. 7-2 Oracle Spatial Topology and Network Data Models SDO_NET_MEM.SET_MAX_MEMORY_SIZE SDO_NET_MEM.SET_MAX_MEMORY_SIZE Format SDO_NET_MEM.SET_MAX_MEMORY_SIZE( maxsize IN NUMBER DEFAULT 262144); Description Sets the Java maximum heap size for an application to run in an Oracle Java virtual machine. Parameters maxsize Number of bytes for the Java maximum heap size. The default value is 262144 (256 MB). Usage Notes If you encounter the java.lang.OutOfMemoryError exception, you can use this procedure to increase the maximum heap size. If you specify a value greater than the system limit, the system limit is used. Examples The following example sets the Java maximum heap size to 524288 (512 MB). EXECUTE SDO_NET_MEM.SET_MAX_MEMORY_SIZE(524288); SDO_NET_MEM Package Subprograms 7-3 SDO_NET_MEM.LINK.GET_CHILD_LINKS SDO_NET_MEM.LINK.GET_CHILD_LINKS Format SDO_NET_MEM.LINK.GET_CHILD_LINKS( net_mem IN VARCHAR2, link_id IN NUMBER ) RETURN SDO_NUMBER_ARRAY; Description Returns the child links of a link. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. link_id Link ID number. Usage Notes This function returns the child links of a link in the specified network memory object. For information about using a network memory object for editing and network analysis operations, see Section 5.7. This function is analogous to using the getChildLinks method of the Link interface of the client-side Java API (described in Section 5.10.2). For information about parent and child nodes and links in a network hierarchy, see Section 5.5. Examples The following example returns the child links of the link whose link ID is 1001 in the current network memory object. (This example is an excerpt from Example 5–5 in Section 5.11.4.) res_array := SDO_NET_MEM.LINK.GET_CHILD_LINKS(net_mem, 1001); DBMS_OUTPUT.PUT('Link 1001 has the following child links: '); FOR indx IN res_array.FIRST..res_array.LAST LOOP DBMS_OUTPUT.PUT(res_array(indx) || ' '); END LOOP; DBMS_OUTPUT.PUT_LINE(' '); . . . Link 1001 has the following child links: 1108 1109 7-4 Oracle Spatial Topology and Network Data Models SDO_NET_MEM.LINK.GET_CO_LINK_IDS SDO_NET_MEM.LINK.GET_CO_LINK_IDS Format SDO_NET_MEM.LINK.GET_CO_LINK_IDS( net_mem IN VARCHAR2, link_id IN NUMBER ) RETURN SDO_NUMBER_ARRAY; Description Returns the co-links of a link. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. link_id Link ID number. Usage Notes This function returns an SDO_NUMBER_ARRAY object with the co-links of a link in the specified network memory object. For information about using a network memory object for editing and network analysis operations, see Section 5.7. The co-link of a link is that link with its direction reversed. That is, the start node of the co-link is the end node of the original link, and the end node of the co-link is the start node of the original link. This function is analogous to using the getCoLinks method of the Link interface of the client-side Java API (described in Section 5.10.2). Examples The following example returns the co-links of the link whose link ID is 9876 in the current network memory object. (This example assumes that a variable named res_ array of type SDO_NUMBER_ARRAY has been declared, and that a variable named net_mem of type VARCHAR2 contains a network name associated with a network memory object.) res_array := SDO_NET_MEM.LINK.GET_CO_LINK_IDS(net_mem, 9876); SDO_NET_MEM Package Subprograms 7-5 SDO_NET_MEM.LINK.GET_COST SDO_NET_MEM.LINK.GET_COST Format SDO_NET_MEM.LINK.GET_COST( net_mem IN VARCHAR2, link_id IN NUMBER ) RETURN NUMBER; Description Returns the cost value of a link. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. link_id Link ID number. Usage Notes This function returns the cost value of a link in the specified network memory object. For information about using a network memory object for editing and network analysis operations, see Section 5.7. This function is analogous to using the getCost method of the Link interface of the client-side Java API (described in Section 5.10.2). To set the cost value of a link, use the SDO_NET_MEM.LINK.SET_COST procedure. Examples The following example returns the cost of the link whose link ID is 1104 in the current network memory object. (This example is an excerpt from Example 5–5 in Section 5.11.4.) res_numeric := SDO_NET_MEM.LINK.GET_COST(net_mem, 1104); DBMS_OUTPUT.PUT_LINE('The cost of link 1104 is: ' || res_numeric); . . . The cost of link 1104 is: 10 7-6 Oracle Spatial Topology and Network Data Models SDO_NET_MEM.LINK.GET_END_MEASURE SDO_NET_MEM.LINK.GET_END_MEASURE Format SDO_NET_MEM.LINK.GET_END_MEASURE( net_mem IN VARCHAR2, link_id IN NUMBER ) RETURN NUMBER; Description Returns the end measure value of a link in an LRS network. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. link_id Link ID number. Usage Notes This function returns the end measure value of a link in an LRS network in the specified network memory object. For information about using a network memory object for editing and network analysis operations, see Section 5.7. This function is analogous to using the getEndMeasure method of the Link interface of the client-side Java API (described in Section 5.10.2). Examples The following example returns the end measure of the link whose link ID is 104 in the current network memory object. (This example is an excerpt from Example 5–4 in Section 5.11.3.) res_numeric := SDO_NET_MEM.LINK.GET_END_MEASURE(net_mem, 104); DBMS_OUTPUT.PUT_LINE('The end measure of link 104 is: ' || res_numeric); . . . The end measure of link 104 is: 6 SDO_NET_MEM Package Subprograms 7-7 SDO_NET_MEM.LINK.GET_END_NODE_ID SDO_NET_MEM.LINK.GET_END_NODE_ID Format SDO_NET_MEM.LINK.GET_END_NODE_ID( net_mem IN VARCHAR2, link_id IN NUMBER ) RETURN NUMBER; Description Returns the end node of a link. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. link_id Link ID number. Usage Notes This function returns the node ID number of the end node of a link in the specified network memory object. For information about using a network memory object for editing and network analysis operations, see Section 5.7. This function is analogous to using the getEndNode method of the Link interface of the client-side Java API (described in Section 5.10.2). To set the end node of a link, use the SDO_NET_MEM.LINK.SET_END_NODE procedure. Examples The following example returns the end node ID of the link whose link ID is 1104 in the current network memory object. (This example is an excerpt from Example 5–5 in Section 5.11.4.) res_numeric := SDO_NET_MEM.LINK.GET_END_NODE_ID(net_mem, 1104); DBMS_OUTPUT.PUT_LINE('The end node of link 1104 is: ' || res_numeric); . . . The end node of link 1104 is: 104 7-8 Oracle Spatial Topology and Network Data Models SDO_NET_MEM.LINK.GET_GEOM_ID SDO_NET_MEM.LINK.GET_GEOM_ID Format SDO_NET_MEM.LINK.GET_GEOM_ID( net_mem IN VARCHAR2, link_id IN NUMBER ) RETURN NUMBER; Description Returns the geometry ID of a link. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. link_id Link ID number. Usage Notes This function returns the geometry ID number of a link in the specified network memory object. For information about using a network memory object for editing and network analysis operations, see Section 5.7. This function is analogous to using the getGeomID method of the Link interface of the client-side Java API (described in Section 5.10.2). To set the geometry ID of a link, use the SDO_NET_MEM.LINK.SET_GEOM_ID procedure. Examples The following example returns the geometry ID of the link whose link ID is 104 in the current network memory object. (This example is an excerpt from Example 5–4 in Section 5.11.3.) res_numeric := SDO_NET_MEM.LINK.GET_GEOM_ID(net_mem, 104); DBMS_OUTPUT.PUT_LINE('The geometry ID of link 104 is: ' || res_numeric); . . . The geometry ID of link 104 is: 1003 SDO_NET_MEM Package Subprograms 7-9 SDO_NET_MEM.LINK.GET_GEOMETRY SDO_NET_MEM.LINK.GET_GEOMETRY Format SDO_NET_MEM.LINK.GET_GEOMETRY( net_mem IN VARCHAR2, link_id IN NUMBER ) RETURN SDO_GEOMETRY; Description Returns the spatial geometry object for a link. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. link_id Link ID number. Usage Notes This function returns the SDO_GEOMETRY object for a link in the specified network memory object. For information about using a network memory object for editing and network analysis operations, see Section 5.7. This function is analogous to using the getGeometry method of the Link interface of the client-side Java API (described in Section 5.10.2). To set the spatial geometry of a link, use the SDO_NET_MEM.LINK.SET_GEOMETRY procedure. Examples The following example returns the spatial geometry of the link whose link ID is 9876 in the current network memory object. (This example assumes that a variable named res_geom of type SDO_GEOMETRY has been declared, and that a variable named net_mem of type VARCHAR2 contains a network name associated with a network memory object.) res_geom := SDO_NET_MEM.LINK.GET_GEOMETRY(net_mem, 9876) 7-10 Oracle Spatial Topology and Network Data Models SDO_NET_MEM.LINK.GET_LEVEL SDO_NET_MEM.LINK.GET_LEVEL Format SDO_NET_MEM.LINK.GET_LEVEL( net_mem IN VARCHAR2, link_id IN NUMBER ) RETURN NUMBER; Description Returns the hierarchy level of a link. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. link_id Link ID number. Usage Notes This function returns the numeric hierarchy level of a link in the specified network memory object. For information about using a network memory object for editing and network analysis operations, see Section 5.7. This function is analogous to using the getLinkLevel method of the Link interface of the client-side Java API (described in Section 5.10.2). To set the hierarchy level of a link, use the SDO_NET_MEM.LINK.SET_LEVEL procedure. For information about parent and child nodes and links in a network hierarchy, see Section 5.5. Examples The following example returns the hierarchy level of the link whose link ID is 1001 in the current network memory object. (This example is an excerpt from Example 5–5 in Section 5.11.4.) res_numeric := SDO_NET_MEM.LINK.GET_LEVEL(net_mem, 1001); DBMS_OUTPUT.PUT_LINE('The hierarchy level of link 1001 is: ' || res_numeric); . . . The hierarchy level of link 1001 is: 2 SDO_NET_MEM Package Subprograms 7-11 SDO_NET_MEM.LINK.GET_NAME SDO_NET_MEM.LINK.GET_NAME Format SDO_NET_MEM.LINK.GET_NAME( net_mem IN VARCHAR2, link_id IN NUMBER ) RETURN VARCHAR2; Description Returns the name of a link. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. link_id Link ID number. Usage Notes This function returns the name of a link in the specified network memory object. For information about using a network memory object for editing and network analysis operations, see Section 5.7. This function is analogous to using the getName method of the Link interface of the client-side Java API (described in Section 5.10.2). To set the name of a link, use the SDO_NET_MEM.LINK.SET_NAME procedure. Examples The following example returns the name of the link whose link ID is 1104 in the current network memory object. (This example is an excerpt from Example 5–5 in Section 5.11.4.) res_string := SDO_NET_MEM.LINK.GET_NAME(net_mem, 1104); DBMS_OUTPUT.PUT_LINE('The name of link 1104 is: ' || res_string); . . . The name of link 1104 is: N3N4 7-12 Oracle Spatial Topology and Network Data Models SDO_NET_MEM.LINK.GET_PARENT_LINK_ID SDO_NET_MEM.LINK.GET_PARENT_LINK_ID Format SDO_NET_MEM.LINK.GET_PARENT_LINK_ID( net_mem IN VARCHAR2, link_id IN NUMBER ) RETURN NUMBER; Description Returns the link ID number of the parent link of a link. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. link_id Link ID number. Usage Notes This function returns the link ID number of the parent link of a link in the specified network memory object. For information about using a network memory object for editing and network analysis operations, see Section 5.7. This function is analogous to using the getParentLink method of the Link interface of the client-side Java API (described in Section 5.10.2). To set the parent link of a link, use the SDO_NET_MEM.LINK.SET_PARENT_LINK procedure. For information about parent and child nodes and links in a network hierarchy, see Section 5.5. Examples The following example returns the parent link ID of the link whose link ID is 1108 in the current network memory object. (This example is an excerpt from Example 5–5 in Section 5.11.4.) res_numeric := SDO_NET_MEM.LINK.GET_PARENT_LINK_ID(net_mem, 1108); DBMS_OUTPUT.PUT_LINE('The parent link of link 1108 is: ' || res_numeric); . . . The parent link of link 1108 is: 1001 SDO_NET_MEM Package Subprograms 7-13 SDO_NET_MEM.LINK.GET_SIBLING_LINK_IDS SDO_NET_MEM.LINK.GET_SIBLING_LINK_IDS Format SDO_NET_MEM.LINK.GET_SIBLING_LINK_IDS( net_mem IN VARCHAR2, link_id IN NUMBER ) RETURN SDO_NUMBER_ARRAY; Description Returns the sibling links of a link. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. link_id Link ID number. Usage Notes This function returns the link ID numbers of the sibling links of a link in the specified network memory object. Sibling links are links that have the same parent link. For information about using a network memory object for editing and network analysis operations, see Section 5.7. This function is analogous to using the getSiblingLinkArray method of the Link interface of the client-side Java API (described in Section 5.10.2). For information about parent and child nodes and links in a network hierarchy, see Section 5.5. However, note that parent and child links can be defined without a network hierarchy or in the same level of a network hierarchy. Examples The following example returns the sibling links of the link whose link ID is 1108 in the current network memory object. In this case, the only sibling link is the one whose link ID is 1109. Both links are children of the link whose link ID is 1001, which is between nodes HN1 and HN2. (This example is an excerpt from Example 5–5 in Section 5.11.4.) res_array := SDO_NET_MEM.LINK.GET_SIBLING_LINK_IDS(net_mem, 1108); DBMS_OUTPUT.PUT('Link 1108 has the following sibling links: '); FOR indx IN res_array.FIRST..res_array.LAST LOOP DBMS_OUTPUT.PUT(res_array(indx) || ' '); END LOOP; DBMS_OUTPUT.PUT_LINE(' '); . . . Link 1108 has the following sibling links: 1109 7-14 Oracle Spatial Topology and Network Data Models SDO_NET_MEM.LINK.GET_START_MEASURE SDO_NET_MEM.LINK.GET_START_MEASURE Format SDO_NET_MEM.LINK.GET_START_MEASURE( net_mem IN VARCHAR2, link_id IN NUMBER ) RETURN NUMBER; Description Returns the start measure value of a link. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. link_id Link ID number. Usage Notes This function returns the start measure value of a link in an LRS network in the specified network memory object. For information about using a network memory object for editing and network analysis operations, see Section 5.7. This function is analogous to using the getStartMeasure method of the Link interface of the client-side Java API (described in Section 5.10.2). Examples The following example returns the start measure value of the link whose link ID is 104 in the current network memory object. (This example is an excerpt from Example 5–4 in Section 5.11.3.) res_numeric := SDO_NET_MEM.LINK.GET_START_MEASURE(net_mem, 104); DBMS_OUTPUT.PUT_LINE('The start measure of link 104 is: ' || res_numeric); . . . The start measure of link 104 is: 0 SDO_NET_MEM Package Subprograms 7-15 SDO_NET_MEM.LINK.GET_START_NODE_ID SDO_NET_MEM.LINK.GET_START_NODE_ID Format SDO_NET_MEM.LINK.GET_START_NODE_ID( net_mem IN VARCHAR2, link_id IN NUMBER ) RETURN NUMBER; Description Returns the start node of a link. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. link_id Link ID number. Usage Notes This function returns the node ID value of the start node of a link in the specified network memory object. For information about using a network memory object for editing and network analysis operations, see Section 5.7. This function is analogous to using the getStartNode method of the Link interface of the client-side Java API (described in Section 5.10.2). To set the start node of a link, use the SDO_NET_MEM.LINK.SET_START_NODE procedure. Examples The following example returns the start node of the link whose link ID is 1001 in the current network memory object. (This example is an excerpt from Example 5–5 in Section 5.11.4.) res_numeric := SDO_NET_MEM.LINK.GET_START_NODE_ID(net_mem, 1104); DBMS_OUTPUT.PUT_LINE('The start node of link 1104 is: ' || res_numeric); . . . The start node of link 1104 is: 103 7-16 Oracle Spatial Topology and Network Data Models SDO_NET_MEM.LINK.GET_STATE SDO_NET_MEM.LINK.GET_STATE Format SDO_NET_MEM.LINK.GET_STATE( net_mem IN VARCHAR2, link_id IN NUMBER ) RETURN VARCHAR2; Description Returns the state of a link. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. link_id Link ID number. Usage Notes This function returns the state of a link in the specified network memory object. For information about using a network memory object for editing and network analysis operations, see Section 5.7. The state is one of the following string values: ACTIVE or INACTIVE. The link state determines whether or not the link is considered by network analysis functions, such as SDO_NET_MEM.NETWORK_MANAGER.SHORTEST_PATH. If the state is ACTIVE, the link is considered by network analysis functions; if the state is INACTIVE, the link is ignored by these functions. This function is analogous to using the getState method of the Link interface of the client-side Java API (described in Section 5.10.2). To set the link state, use the SDO_NET_MEM.LINK.SET_STATE procedure. Examples The following example returns the state of the link whose link ID is 1104 in the current network memory object. (This example is an excerpt from Example 5–5 in Section 5.11.4.) res_string := SDO_NET_MEM.LINK.GET_STATE(net_mem, 1104); DBMS_OUTPUT.PUT_LINE('The state of link 1104 is: ' || res_string); . . . The state of link 1104 is: ACTIVE SDO_NET_MEM Package Subprograms 7-17 SDO_NET_MEM.LINK.GET_TYPE SDO_NET_MEM.LINK.GET_TYPE Format SDO_NET_MEM.LINK.GET_TYPE( net_mem IN VARCHAR2, link_id IN NUMBER ) RETURN VARCHAR2; Description Returns the type of a link. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. link_id Link ID number. Usage Notes This function returns the type of a link in the specified network memory object. For information about using a network memory object for editing and network analysis operations, see Section 5.7. This function is analogous to using the getType method of the Link interface of the client-side Java API (described in Section 5.10.2). To set the type of a link, use the SDO_NET_MEM.LINK.SET_TYPE procedure. Examples The following example sets and gets the type of the link whose link ID is 1119 in the current network memory object. (This example is an excerpt from Example 5–5 in Section 5.11.4.) SDO_NET_MEM.LINK.SET_TYPE(net_mem, 1119, 'Associative'); res_string := SDO_NET_MEM.LINK.GET_TYPE(net_mem, 1119); DBMS_OUTPUT.PUT_LINE('The type of link 1119 is: ' || res_string); . . . The type of link 1119 is: Associative 7-18 Oracle Spatial Topology and Network Data Models SDO_NET_MEM.LINK.IS_ACTIVE SDO_NET_MEM.LINK.IS_ACTIVE Format SDO_NET_MEM.LINK.IS_ACTIVE( net_mem IN VARCHAR2, link_id IN NUMBER ) RETURN VARCHAR2; Description Checks if a link is active. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. link_id Link ID number. Usage Notes This function returns the string value TRUE if the link in the specified network memory object is active, and the string value FALSE if the link is not active. For information about using a network memory object for editing and network analysis operations, see Section 5.7. This function is analogous to using the isActive method of the Link interface of the client-side Java API (described in Section 5.10.2). Examples The following example checks if the link whose link ID is 1104 in the current network memory object is active. (This example is an excerpt from Example 5–5 in Section 5.11.4.) res_string := SDO_NET_MEM.LINK.IS_ACTIVE(net_mem, 1104); DBMS_OUTPUT.PUT_LINE('Is link 1104 active?: ' || res_string); . . . Is link 1104 active?: TRUE SDO_NET_MEM Package Subprograms 7-19 SDO_NET_MEM.LINK.IS_EXTERNAL_LINK SDO_NET_MEM.LINK.IS_EXTERNAL_LINK Format SDO_NET_MEM.LINK.IS_EXTERNAL_LINK( net_mem IN VARCHAR2, link_id IN NUMBER ) RETURN VARCHAR2; Description Checks if a link is in an external network. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. link_id Link ID number. Usage Notes This function returns the string value TRUE if the link in the specified network memory object is in an external network, and the string value FALSE if the link is not in an external network. For information about using a network memory object for editing and network analysis operations, see Section 5.7. This function is analogous to using the isExternalLink method of the Link interface of the client-side Java API (described in Section 5.10.2). Examples The following example checks if the link whose link ID is 1004 in the current network memory object is in an external network. (This example is an excerpt from Example 5–5 in Section 5.11.4.) res_string := SDO_NET_MEM.LINK.IS_EXTERNAL_LINK(net_mem, 1104); DBMS_OUTPUT.PUT_LINE('Is link 1104 an external link?: ' || res_string); . . . Is link 1104 an external link?: FALSE 7-20 Oracle Spatial Topology and Network Data Models SDO_NET_MEM.LINK.IS_LOGICAL SDO_NET_MEM.LINK.IS_LOGICAL Format SDO_NET_MEM.LINK.IS_LOGICAL( net_mem IN VARCHAR2, link_id IN NUMBER ) RETURN VARCHAR2; Description Checks if a link is in a logical network. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. link_id Link ID number. Usage Notes This function returns the string value TRUE if the link in the specified network memory object is in a logical network, and the string value FALSE if the link is not in a logical network. For information about using a network memory object for editing and network analysis operations, see Section 5.7. This function is analogous to using the isLogical method of the Link interface of the client-side Java API (described in Section 5.10.2). Examples The following example checks if the link whose link ID is 1104 in the current network memory object is in a logical network. (This example is an excerpt from Example 5–5 in Section 5.11.4.) res_string := SDO_NET_MEM.LINK.IS_LOGICAL(net_mem, 1104); DBMS_OUTPUT.PUT_LINE('Is link 1104 a logical link?: ' || res_string); . . . Is link 1104 a logical link?: TRUE SDO_NET_MEM Package Subprograms 7-21 SDO_NET_MEM.LINK.IS_TEMPORARY SDO_NET_MEM.LINK.IS_TEMPORARY Format SDO_NET_MEM.LINK.IS_TEMPORARY( net_mem IN VARCHAR2, link_id IN NUMBER ) RETURN VARCHAR2; Description Checks if a link is temporary. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. link_id Link ID number. Usage Notes This function returns the string value TRUE if the link in the specified network memory object is temporary, and the string value FALSE if the link is not temporary. For information about using a network memory object for editing and network analysis operations, see Section 5.7. Temporary links, nodes, and paths are not saved in the database when you call the SDO_NET_MEM.NETWORK_MANAGER.WRITE_NETWORK procedure. This function is analogous to using the isTemporary method of the Link interface of the client-side Java API (described in Section 5.10.2). Examples The following example checks if the link whose link ID is 1104 in the current network memory object is temporary. (This example is an excerpt from Example 5–5 in Section 5.11.4.) res_string := SDO_NET_MEM.LINK.IS_TEMPORARY(net_mem, 1104); DBMS_OUTPUT.PUT_LINE('Is link 1104 temporary?: ' || res_string); . . . Is link 1104 temporary?: FALSE 7-22 Oracle Spatial Topology and Network Data Models SDO_NET_MEM.LINK.SET_COST SDO_NET_MEM.LINK.SET_COST Format SDO_NET_MEM.LINK.SET_COST( net_mem IN VARCHAR2, link_id IN NUMBER, cost IN NUMBER); Description Sets the cost value of a link. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. link_id Link ID number. cost Cost value. Usage Notes This procedure sets the cost of a link in the specified network memory object. For information about using a network memory object for editing and network analysis operations, see Section 5.7. This procedure is analogous to using the setCost method of the Link interface of the client-side Java API (described in Section 5.10.2). To get the cost value of a link, use the SDO_NET_MEM.LINK.GET_COST function. Examples The following example sets the cost of the link whose link ID is 1119 in the current network memory object to 40. (This example is an excerpt from Example 5–5 in Section 5.11.4.) SDO_NET_MEM.LINK.SET_COST(net_mem, 1119, 40); SDO_NET_MEM Package Subprograms 7-23 SDO_NET_MEM.LINK.SET_END_NODE SDO_NET_MEM.LINK.SET_END_NODE Format SDO_NET_MEM.LINK.SET_END_NODE( net_mem IN VARCHAR2, link_id IN NUMBER, end_node_id IN NUMBER); Description Sets the end node of a link. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. link_id Link ID number. end_node_id Node ID number. Usage Notes This procedure sets the end node of a link in the specified network memory object. For information about using a network memory object for editing and network analysis operations, see Section 5.7. This procedure is analogous to using the setEndNode method of the Link interface of the client-side Java API (described in Section 5.10.2). To get the end node of a link, use the SDO_NET_MEM.LINK.GET_END_NODE_ID function. Examples The following example sets the end node of the link whose link ID is 1119 in the current network memory object to the node with the node ID value of 109. (This example is an excerpt from Example 5–5 in Section 5.11.4.) SDO_NET_MEM.LINK.SET_END_NODE(net_mem, 1119, 109); 7-24 Oracle Spatial Topology and Network Data Models SDO_NET_MEM.LINK.SET_GEOM_ID SDO_NET_MEM.LINK.SET_GEOM_ID Format SDO_NET_MEM.LINK.SET_GEOM_ID( net_mem IN VARCHAR2, link_id IN NUMBER, geom_id IN NUMBER); Description Sets the geometry ID number of a link. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. link_id Link ID number. geom_id Geometry ID number. Usage Notes This procedure sets the geometry ID number of a link in the specified network memory object. For information about using a network memory object for editing and network analysis operations, see Section 5.7. This procedure is analogous to using the setGeomID method of the Link interface of the client-side Java API (described in Section 5.10.2). To get the geometry ID of a link, use the SDO_NET_MEM.LINK.GET_GEOM_ID function. Examples The following example sets the geometry ID of the link whose link ID is 302 in the current network memory object to 9999. SDO_NET_MEM.LINK.SET_GEOM_ID(net_mem, 302, 9999); SDO_NET_MEM Package Subprograms 7-25 SDO_NET_MEM.LINK.SET_GEOMETRY SDO_NET_MEM.LINK.SET_GEOMETRY Format SDO_NET_MEM.LINK.SET_GEOMETRY( net_mem IN VARCHAR2, link_id IN NUMBER, geom IN SDO_GEOMETRY); Description Sets the spatial geometry of a link. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. link_id Link ID number. geom Spatial geometry object. Usage Notes This procedure sets the SDO_GEOMETRY object for a link in the specified network memory object. For information about using a network memory object for editing and network analysis operations, see Section 5.7. This procedure is analogous to using the setGeometry method of the Link interface of the client-side Java API (described in Section 5.10.2). To get the spatial geometry of a link, use the SDO_NET_MEM.LINK.GET_ GEOMETRY function. Examples The following example sets the spatial geometry of the link whose link ID is 5678 in the current network memory object to a specified line string SDO_GEOMETRY object. (This example assumes that a variable named net_mem of type VARCHAR2 contains a network name associated with a network memory object.) SDO_NET_MEM.LINK.SET_GEOMETRY(net_mem, 5678, SDO_GEOMETRY(2002, NULL, NULL, SDO_ELEM_INFO_ARRAY(1,2,1), SDO_ORDINATE_ARRAY(9, 4, 1,1))); 7-26 Oracle Spatial Topology and Network Data Models SDO_NET_MEM.LINK.SET_LEVEL SDO_NET_MEM.LINK.SET_LEVEL Format SDO_NET_MEM.LINK.SET_LEVEL( net_mem IN VARCHAR2, link_id IN NUMBER, level IN NUMBER); Description Sets the hierarchy level of a link. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. link_id Link ID number. level Hierarchy level number. Usage Notes This procedure sets the hierarchy level of a link in the specified network memory object. For information about using a network memory object for editing and network analysis operations, see Section 5.7. This procedure is analogous to using the setLinkLevel method of the Link interface of the client-side Java API (described in Section 5.10.2). To get the hierarchy level of a link, use the SDO_NET_MEM.LINK.GET_LEVEL function. For information about parent and child nodes and links in a network hierarchy, see Section 5.5. Examples The following example sets the hierarchy level of the link whose link ID is 1119 in the current network memory object to 2. (This example is an excerpt from Example 5–5 in Section 5.11.4.) SDO_NET_MEM.LINK.SET_LEVEL(net_mem, 1119, 2); SDO_NET_MEM Package Subprograms 7-27 SDO_NET_MEM.LINK.SET_MEASURE SDO_NET_MEM.LINK.SET_MEASURE Format SDO_NET_MEM.LINK.SET_MEASURE( net_mem IN VARCHAR2, link_id IN NUMBER, start_measure IN NUMBER, end_measure IN NUMBER); Description Sets the start and end measure values of a link in an LRS network. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. link_id Link ID number. start_measure Start measure value. end_measure End measure value. Usage Notes This procedure sets the start and end measure values of a link in an LRS network in the specified network memory object. For information about using a network memory object for editing and network analysis operations, see Section 5.7. This procedure is analogous to using the setMeasure method of the Link interface of the client-side Java API (described in Section 5.10.2). To get the start measure of a link, use the SDO_NET_MEM.LINK.GET_START_ MEASURE function. To get the end measure of a link, use the SDO_NET_ MEM.LINK.GET_END_MEASURE function. Examples The following example sets the measure values of the link whose link ID is 302 in the current network memory object, so that the start measure is 111 and the end measure is 114.16. (This example is an excerpt from Example 5–4 in Section 5.11.3.) SDO_NET_MEM.LINK.SET_MEASURE(net_mem, 302, 111, 114.16); 7-28 Oracle Spatial Topology and Network Data Models SDO_NET_MEM.LINK.SET_NAME SDO_NET_MEM.LINK.SET_NAME Format SDO_NET_MEM.LINK.SET_NAME( net_mem IN VARCHAR2, link_id IN NUMBER, link_name IN VARCHAR2); Description Sets the name of a link. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. link_id Link ID number. link_name Link name string. Usage Notes This procedure sets the name of a link in an LRS network in the specified network memory object. For information about using a network memory object for editing and network analysis operations, see Section 5.7. This procedure is analogous to using the setName method of the Link interface of the client-side Java API (described in Section 5.10.2). To get the name of a link, use the SDO_NET_MEM.LINK.GET_NAME function. Examples The following example sets the name of the link whose link ID is 1119 in the current network memory object to My favorite link. (This example is an excerpt from Example 5–5 in Section 5.11.4.) SDO_NET_MEM.LINK.SET_NAME(net_mem, 1119, 'My favorite link'); SDO_NET_MEM Package Subprograms 7-29 SDO_NET_MEM.LINK.SET_PARENT_LINK SDO_NET_MEM.LINK.SET_PARENT_LINK Format SDO_NET_MEM.LINK.SET_PARENT_LINK( net_mem IN VARCHAR2, link_id IN NUMBER, parent_link_id IN NUMBER); Description Sets the parent link of a link. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. link_id Link ID number. parent_link_id Link ID number of the parent link. Usage Notes This procedure sets the parent link of a link in the specified network memory object. For information about using a network memory object for editing and network analysis operations, see Section 5.7. This procedure is analogous to using the setParentLink method of the Link interface of the client-side Java API (described in Section 5.10.2). To get the parent link of a link, use the SDO_NET_MEM.LINK.GET_PARENT_LINK_ ID function. For information about parent and child nodes and links in a network hierarchy, see Section 5.5. Examples The following example sets the parent link of the link whose link ID is 1119 in the current network memory object to the link whose link ID value is 1001. (This example is an excerpt from Example 5–5 in Section 5.11.4.) SDO_NET_MEM.LINK.SET_PARENT_LINK(net_mem, 1119, 1001); 7-30 Oracle Spatial Topology and Network Data Models SDO_NET_MEM.LINK.SET_START_NODE SDO_NET_MEM.LINK.SET_START_NODE Format SDO_NET_MEM.LINK.SET_START_NODE( net_mem IN VARCHAR2, link_id IN NUMBER, srart_node_id IN NUMBER); Description Sets the start node of a link. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. link_id Link ID number. start_node_id Node ID number. Usage Notes This procedure sets the start node of a link in the specified network memory object. For information about using a network memory object for editing and network analysis operations, see Section 5.7. This procedure is analogous to using the setStartNode method of the Link interface of the client-side Java API (described in Section 5.10.2). To get the start node of a link, use the SDO_NET_MEM.LINK.GET_START_NODE_ID function. Examples The following example sets the start of the link whose link ID is 1119 in the current network memory object to the node whose node ID is 110. (This example is an excerpt from Example 5–5 in Section 5.11.4.) SDO_NET_MEM.LINK.SET_START_NODE(net_mem, 1119, 110); SDO_NET_MEM Package Subprograms 7-31 SDO_NET_MEM.LINK.SET_STATE SDO_NET_MEM.LINK.SET_STATE Format SDO_NET_MEM.LINK.SET_STATE( net_mem IN VARCHAR2, link_id IN NUMBER, state IN VARCHAR2); Description Sets the state value of a link. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. link_id Link ID number. state State value. Must be one of the following strings: ACTIVE or INACTIVE. Usage Notes This procedure sets the state of a link in the specified network memory object. For information about using a network memory object for editing and network analysis operations, see Section 5.7. The link state determines whether or not the link is considered by network analysis functions, such as SDO_NET_MEM.NETWORK_MANAGER.SHORTEST_PATH. If the state is ACTIVE, the link is considered by network analysis functions; if the state is INACTIVE, the link is ignored by these functions. This procedure is analogous to using the setState method of the Link interface of the client-side Java API (described in Section 5.10.2). To get the link state, use the SDO_NET_MEM.LINK.GET_STATE function. Examples The following example sets the state of the link whose link ID is 1119 in the current network memory object to INACTIVE. (This example is an excerpt from Example 5–5 in Section 5.11.4.) SDO_NET_MEM.LINK.SET_STATE(net_mem, 1119, 'INACTIVE'); 7-32 Oracle Spatial Topology and Network Data Models SDO_NET_MEM.LINK.SET_TYPE SDO_NET_MEM.LINK.SET_TYPE Format SDO_NET_MEM.LINK.SET_TYPE( net_mem IN VARCHAR2, link_id IN NUMBER, type IN VARCHAR2); Description Sets the type of a link. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. link_id Link ID number. type String reflecting a user-determined type for the link. Usage Notes This procedure sets the type of a link in the specified network memory object. For information about using a network memory object for editing and network analysis operations, see Section 5.7. This procedure is analogous to using the setType method of the Link interface of the client-side Java API (described in Section 5.10.2). To get the type of a link, use the SDO_NET_MEM.LINK.GET_TYPE function. Examples The following example sets the type of the link whose link ID is 302 in the current network memory object to Normal street. (This example is an excerpt from Example 5–4 in Section 5.11.3.) SDO_NET_MEM.LINK.SET_TYPE(net_mem, 302, 'Normal street'); SDO_NET_MEM Package Subprograms 7-33 SDO_NET_MEM.NETWORK.ADD_LINK SDO_NET_MEM.NETWORK.ADD_LINK Format SDO_NET_MEM.NETWORK.ADD_LINK( net_mem IN VARCHAR2, link_id IN NUMBER, link_name IN NUMBER, start_node_id IN NUMBER, end_node_id IN NUMBER, cost IN NUMBER); or SDO_NET_MEM.NETWORK.ADD_LINK( net_mem IN VARCHAR2, link_id IN NUMBER, link_name IN NUMBER, start_node_id IN NUMBER, end_node_id IN NUMBER, cost IN NUMBER, geom_id IN NUMBER, start_measure IN NUMBER, end_measure IN NUMBER); or SDO_NET_MEM.ADD_LINK( net_mem IN VARCHAR2, link_id IN NUMBER, link_name IN NUMBER, start_node_id IN NUMBER, end_node_id IN NUMBER, geom cost IN SDO_GEOMETRY, IN NUMBER); Description Adds a link to a network. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. 7-34 Oracle Spatial Topology and Network Data Models SDO_NET_MEM.NETWORK.ADD_LINK link_id ID number of the link to be added. link_name Name of the link to be added. start_node_id Node ID of the start node of the link to be added. end_node_id Node ID of the end node of the link to be added. cost Cost value associated with the link. geom_id For an LRS geometry, the geometry ID of the geometry object. start_measure For an LRS geometry, the start measure value in the geometry object corresponding to the start node for this link. end_measure For an LRS geometry, the end measure value in the geometry object corresponding to the end node for this link. geom SDO_GEOMETRY object (line or contiguous line string geometry) representing the link to be added. Usage Notes This procedure adds a link in the specified network memory object. For information about using a network memory object for editing and network analysis operations, see Section 5.7. An exception is raised if the specified network memory object is read-only. This procedure is analogous to using the addLink method of the Network class of the client-side Java API (described in Section 5.10.2). Examples The following example adds a link whose link ID is 9901 in the current network memory object. (This example is an excerpt from Example 5–1 in Section 5.7.) -- Add a link with ID=9901, name=N901N1, cost=20 from node N901 to node N1. sdo_net_mem.network.add_link(net_mem=>'XYZ_NETWORK', link_id=>9901, link_name=>'N901N1', start_node_id=>901, end_node_id=>101, cost=>20); SDO_NET_MEM Package Subprograms 7-35 SDO_NET_MEM.NETWORK.ADD_LRS_NODE SDO_NET_MEM.NETWORK.ADD_LRS_NODE Format SDO_NET_MEM.NETWORK.ADD_LRS_NODE( net_mem IN VARCHAR2, node_id IN NUMBER, node_name IN VARCHAR2, geom_id IN NUMBER, measure IN NUMBER, geom IN SDO_GEOMETRY, external_network_id IN NUMBER, external_node_id IN NUMBER); Description Adds an LRS node (point geometry with measure information) to a network. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. node_id Node ID of the node to be added. node_name Name of the node to be added. geom_id Geometry ID of the geometry object. measure Measure value of the node to be added. geom Geometry object of the node to be added. Must be a linear referencing system (LRS) geometry with the measure value for the third dimension value. external_network_id If the node is also a node in an external network, the network ID of the external network. external_node_id If the node is also a node in an external network, the node ID of the node in the external network. 7-36 Oracle Spatial Topology and Network Data Models SDO_NET_MEM.NETWORK.ADD_LRS_NODE Usage Notes This procedure adds an LRS node in the specified network memory object. For information about using a network memory object for editing and network analysis operations, see Section 5.7. An exception is raised if the specified network memory object is read-only. Examples The following example adds an LRS node whose node ID is 901 in the network memory object for a network named MY_LRS_NETWORK. DECLARE res_string VARCHAR2(100); BEGIN -- Add an LRS node with ID=901. SDO_NET_MEM.NETWORK.ADD_LRS_NODE(net_mem=>'MY_LRS_NETWORK', node_id=>901, node_name=>'N901', geom_id=>9901, measure=>8, geom=>SDO_GEOMETRY(3301, NULL, NULL, SDO_ELEM_INFO_ARRAY(1, 1, 1), SDO_ORDINATE_ARRAY(8,13,9)), external_network_id=>0, external_node_id=>0); -- GET_NAME res_string := SDO_NET_MEM.NODE.GET_NAME('ROADS_NETWORK', 901); DBMS_OUTPUT.PUT_LINE('The name of node 901 is: ' || res_string); END; / . . . The name of node 901 is: N901 SDO_NET_MEM Package Subprograms 7-37 SDO_NET_MEM.NETWORK.ADD_NODE SDO_NET_MEM.NETWORK.ADD_NODE Format SDO_NET_MEM.NETWORK.ADD_NODE( net_mem IN VARCHAR2, node_id IN NUMBER, node_name IN VARCHAR2, external_network_id IN NUMBER, external_node_id IN NUMBER); Description Adds a node (with no associated geometry object) to a network. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. node_id Node ID of the node to be added. node_name Name of the node to be added. external_network_id If the node is also a node in an external network, the network ID of the external network. external_node_id If the node is also a node in an external network, the node ID of the node in the external network. Usage Notes This procedure adds a node in the specified network memory object. For information about using a network memory object for editing and network analysis operations, see Section 5.7. An exception is raised if the specified network memory object is read-only. This procedure is analogous to using the addNode method of the Network class of the client-side Java API (described in Section 5.10.2). Examples The following example adds a node whose node ID is 901 in the current network memory object. (This example is an excerpt from Example 5–1 in Section 5.7.) -- Add a node with ID=901, and set its name to N901. sdo_net_mem.network.add_node(net_mem=>'XYZ_NETWORK', node_id=>901, node_name=>'N901', external_network_id=>0, external_node_id=>0); 7-38 Oracle Spatial Topology and Network Data Models SDO_NET_MEM.NETWORK.ADD_PATH SDO_NET_MEM.NETWORK.ADD_PATH Format SDO_NET_MEM.NETWORK.ADD_PATH( net_mem IN VARCHAR2, path_id IN NUMBER); or SDO_NET_MEM.NETWORK.ADD_PATH( net_mem IN VARCHAR2, path_ids IN SDO_NUMBER_ARRAY); Description Adds one or more paths to a network. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. path_id Path ID of the path to be added. path_ids SDO_NUMBER_ARRAY object specifying the path IDs of the paths to be added. Usage Notes This procedure adds one or more paths in the specified network memory object. For information about using a network memory object for editing and network analysis operations, see Section 5.7. An exception is raised if the specified network memory object is read-only. This procedure is analogous to using the addPath method of the Network class of the client-side Java API (described in Section 5.10.2). Examples The following example adds a path whose path ID is stored in a variable named path_id. (This example is an excerpt from Example 5–1 in Section 5.7.) sdo_net_mem.network.add_path(net_mem=>'XYZ_NETWORK', path_id=>path_id); SDO_NET_MEM Package Subprograms 7-39 SDO_NET_MEM.NETWORK.ADD_SDO_NODE SDO_NET_MEM.NETWORK.ADD_SDO_NODE Format SDO_NET_MEM.NETWORK.ADD_SDO_NODE( net_mem IN VARCHAR2, node_id IN NUMBER, node_name IN VARCHAR2, x IN VARCHAR2, y IN VARCHAR2, external_network_id IN NUMBER, external_node_id IN NUMBER); Description Adds a node (with associated spatial coordinates) to a network. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. node_id Node ID of the node to be added. node_name Name of the node to be added. x X-axis coordinate value for the node to be added. y Y-axis coordinate value for the node to be added. external_network_id If the node is also a node in an external network, the network ID of the external network. external_node_id If the node is also a node in an external network, the node ID of the node in the external network. Usage Notes This procedure adds a node in the specified network memory object. For information about using a network memory object for editing and network analysis operations, see Section 5.7. An exception is raised if the specified network memory object is read-only. This procedure is analogous to using the addNode method of the Network class of the client-side Java API (described in Section 5.10.2). 7-40 Oracle Spatial Topology and Network Data Models SDO_NET_MEM.NETWORK.ADD_SDO_NODE Examples The following example adds an SDO node whose node ID is 801 in the network memory object for a network named ROADS_NETWORK. DECLARE res_string VARCHAR2(100); BEGIN -- Add an SDO node with ID=801. SDO_NET_MEM.NETWORK.ADD_SDO_NODE(net_mem=>'ROADS_NETWORK', node_id=>801, node_name=>'N801', x=>8, y=>12, external_network_id=>0, external_node_id=>0); -- GET_NAME res_string := SDO_NET_MEM.NODE.GET_NAME('ROADS_NETWORK', 801); DBMS_OUTPUT.PUT_LINE('The name of node 801 is: ' || res_string); END; / . . . The name of node 801 is: N801 SDO_NET_MEM Package Subprograms 7-41 SDO_NET_MEM.NETWORK.DELETE_LINK SDO_NET_MEM.NETWORK.DELETE_LINK Format SDO_NET_MEM.NETWORK.DELETE_LINK( net_mem IN VARCHAR2, link_id IN NUMBER); Description Deletes a link from a network. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. link_id Link ID of the link to be deleted. Usage Notes This procedure deletes a link from the specified network memory object. For information about using a network memory object for editing and network analysis operations, see Section 5.7. An exception is raised if the specified network memory object is read-only. This procedure is analogous to using the deleteLink method of the Network interface of the client-side Java API (described in Section 5.10.2). Examples The following example deletes the link whose link ID is 302 in the network memory object for a network named MY_NETWORK. EXECUTE SDO_NET_MEM.NETWORK.DELETE_LINK('MY_NETWORK', 302); 7-42 Oracle Spatial Topology and Network Data Models SDO_NET_MEM.NETWORK.DELETE_NODE SDO_NET_MEM.NETWORK.DELETE_NODE Format SDO_NET_MEM.NETWORK.DELETE_NODE( net_mem IN VARCHAR2, node_id IN NUMBER); Description Deletes a node from a network. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. node_id Node ID of the node to be deleted. Usage Notes This procedure deletes a node from the specified network memory object. For information about using a network memory object for editing and network analysis operations, see Section 5.7. An exception is raised if the specified network memory object is read-only. This procedure is analogous to using the deleteNode method of the Network interface of the client-side Java API (described in Section 5.10.2). Examples The following example deletes the node whose node ID is 8 in the network memory object for a network named ROADS_NETWORK. EXECUTE SDO_NET_MEM.NETWORK.DELETE_NODE('ROADS_NETWORK', 8); SDO_NET_MEM Package Subprograms 7-43 SDO_NET_MEM.NETWORK.DELETE_PATH SDO_NET_MEM.NETWORK.DELETE_PATH Format SDO_NET_MEM.NETWORK.DELETE_PATH( net_mem IN VARCHAR2, path_id IN NUMBER); Description Deletes a path from a network. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. path_id Link ID of the path to be deleted. Usage Notes This procedure deletes a path from the specified network memory object. For information about using a network memory object for editing and network analysis operations, see Section 5.7. An exception is raised if the specified network memory object is read-only. This procedure is analogous to using the deletePath method of the Network interface of the client-side Java API (described in Section 5.10.2). Examples The following example deletes the path whose path ID is 1 in the network memory object for a network named ROADS_NETWORK. EXECUTE SDO_NET_MEM.NETWORK.DELETE_PATH('ROADS_NETWORK', 1); 7-44 Oracle Spatial Topology and Network Data Models SDO_NET_MEM.NETWORK_MANAGER.ALL_PATHS SDO_NET_MEM.NETWORK_MANAGER.ALL_PATHS Format SDO_NET_MEM.NETWORK_MANAGER.ALL_PATHS( net_mem IN VARCHAR2, start_node_id IN NUMBER, goal_node_id IN NUMBER, depth_limit IN NUMBER, cost_limit IN NUMBER, no_of_solutions IN NUMBER, constraint IN VARCHAR2 DEFAULT NULL ) RETURN SDO_NUMBER_ARRAY; Description Returns all paths between two nodes. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. start_node_id Node ID of the start node in the pair of nodes between which to find paths. goal_node_id Node ID of the end (goal) node in the pair of nodes between which to find paths. depth_limit Maximum number of hierarchy levels below the level containing the start and goal nodes in which to search for paths. If this parameter is null, all available hierarchy levels are considered. cost_limit Maximum cost total value of the links in a path. If this parameter is null, no cost limit is applied. no_of_solutions Maximum number of paths to be returned. If this parameter is null, all paths that meet the other criteria for this function are returned. constraint Name of the network constraint to be applied. If this parameter is null, no network constraint is applied. (For information about network constraints, see Section 5.6.) Usage Notes This function returns paths between a start node and an end (goal) node in the specified network memory object. For information about using a network memory object for editing and network analysis operations, see Section 5.7. SDO_NET_MEM Package Subprograms 7-45 SDO_NET_MEM.NETWORK_MANAGER.ALL_PATHS This function is analogous to using the allPaths method of the NetworkManager class of the client-side Java API (described in Section 5.10.2). Examples The following example returns up to 5 paths, each up to a maximum cost value of 200, between the nodes with node ID values 101 and 105 in the current network memory object. It also displays some information about each returned path. (This example is an excerpt from Example 5–5 in Section 5.11.4.) res_array := SDO_NET_MEM.NETWORK_MANAGER.ALL_PATHS(net_mem,101,105,10,200,5); DBMS_OUTPUT.PUT_LINE('For each path from node 101 to node 105: '); FOR indx IN res_array.FIRST..res_array.LAST LOOP res_numeric := res_array(indx); DBMS_OUTPUT.PUT_LINE('Path ' || res_numeric || ' has the following properties: '); cost := SDO_NET_MEM.PATH.GET_COST(net_mem, res_numeric); DBMS_OUTPUT.PUT_LINE('Path ' || res_numeric || ' cost: ' || cost); res_string := SDO_NET_MEM.PATH.IS_CLOSED(net_mem, res_array(indx)); DBMS_OUTPUT.PUT_LINE('Is path ' || res_numeric || ' closed? ' || res_string); END LOOP; For each path from node 101 to node 105: Path 7 has the following properties: Path 7 cost: 50 Is path 7 closed? FALSE Path 8 has the following properties: Path 8 cost: 70 Is path 8 closed? FALSE Path 9 has the following properties: Path 9 cost: 70 Is path 9 closed? FALSE Path 10 has the following properties: Path 10 cost: 90 Is path 10 closed? FALSE Path 11 has the following properties: Path 11 cost: 120 Is path 11 closed? FALSE 7-46 Oracle Spatial Topology and Network Data Models SDO_NET_MEM.NETWORK_MANAGER.CREATE_LOGICAL_NETWORK SDO_NET_MEM.NETWORK_MANAGER.CREATE_LOGICAL_NETWORK Format SDO_NET_MEM.NETWORK_MANAGER.CREATE_LOGICAL_NETWORK( network_name IN VARCHAR2, no_of_hierarchy_levels IN NUMBER, is_directed IN VARCHAR2, node_table_name IN VARCHAR2, node_cost_column IN VARCHAR2, link_table_name IN VARCHAR2, link_cost_column IN VARCHAR2, path_table_name IN VARCHAR2, path_link_table_name IN VARCHAR2, is_complex IN VARCHAR2 DEFAULT ’FALSE’); Description Creates a logical network, creates all necessary tables, and updates the network metadata. Parameters network_name Name of the network. no_of_hierarchy_levels Number of hierarchy levels for links in the network. (For an explanation of network hierarchy, see Section 5.5.) is_directed A Boolean value. TRUE indicates that the links are directed; FALSE indicates that the links are undirected (not directed). node_table_name Name of the node table to be created. (The node table is explained in Section 5.8.1.) node_cost_column Name of the cost column in the node table. (The node table is explained in Section 5.8.1.) link_table_name Name of the link table to be created. (The link table is explained in Section 5.8.2.) link_cost_column Name of the cost column in the link table. (The link table is explained in Section 5.8.2.) path_table_name Name of the path table to be created. (The path table is explained in Section 5.8.3.) SDO_NET_MEM Package Subprograms 7-47 SDO_NET_MEM.NETWORK_MANAGER.CREATE_LOGICAL_NETWORK path_link_table_name Name of the path-link table to be created. (The path-link table is explained in Section 5.8.4.) is_complex Reserved for future use. Ignored for the current release. Usage Notes This procedure creates a logical network in a network memory object, the use of which is explained in Section 5.7. This procedure provides a convenient way to create a logical network when the node, link, and optional related tables do not already exist. The procedure creates the network; creates the node, link, path, and path-link tables for the network; and inserts the appropriate information in the xxx_SDO_NETWORK_METADATA views (described in Section 5.9.1). Examples The following example creates a logical network named MY_LOGICAL_NET. The network has two hierarchy levels and is undirected (’FALSE’ for is_directed). EXECUTE SDO_NET_MEM.NETWORK_MANAGER.CREATE_LOGICAL_NETWORK('MY_LOGICAL_NET', 2, 'FALSE', 'MY_NODE_TABLE', 'COST', 'MY_LINK_TABLE', 'COST', 'MY_PATH_TABLE', 'MY_PATHLINK_TABLE', 'FALSE'); 7-48 Oracle Spatial Topology and Network Data Models SDO_NET_MEM.NETWORK_MANAGER.CREATE_LRS_NETWORK SDO_NET_MEM.NETWORK_MANAGER.CREATE_LRS_NETWORK Format SDO_NET_MEM.NETWORK_MANAGER.CREATE_LRS_NETWORK( network_name IN VARCHAR2, no_of_hierarchy_levels IN NUMBER, is_directed IN VARCHAR2, srid IN NUMBER, no_of_dims IN NUMBER, node_table_name IN VARCHAR2, node_cost_column IN VARCHAR2, link_table_name IN VARCHAR2, link_cost_column IN VARCHAR2, lrs_table_name IN VARCHAR2, lrs_geom_column IN VARCHAR2, path_table_name IN VARCHAR2, path_geom_column IN VARCHAR2, path_link_table_name IN VARCHAR2, is_complex IN VARCHAR2 DEFAULT ’FALSE’); Description Creates a spatial network containing LRS SDO_GEOMETRY objects, creates all necessary tables, and updates the network metadata. Parameters network_name Name of the network. no_of_hierarchy_levels Number of hierarchy levels for links in the network. (For an explanation of network hierarchy, see Section 5.5.) is_directed A Boolean value. TRUE indicates that the links are directed; FALSE indicates that the links are undirected (not directed). srid Coordinate system (spatial reference system) associated with the network. Must be specified as either null (no coordinate system is associated) or a value from the SRID column of the SDO_COORD_REF_SYS table (described in Oracle Spatial User's Guide and Reference). no_of_dims Number of dimensions for the data, including the LRS measure dimension. SDO_NET_MEM Package Subprograms 7-49 SDO_NET_MEM.NETWORK_MANAGER.CREATE_LRS_NETWORK node_table_name Name of the node table to be created. (The node table is explained in Section 5.8.1.) node_cost_column Name of the cost column in the node table. (The node table is explained in Section 5.8.1.) link_table_name Name of the link table to be created. (The link table is explained in Section 5.8.2.) link_cost_column Name of the cost column in the link table. (The link table is explained in Section 5.8.2.) lrs_table_name Name of the table to be created for the spatial LRS geometries lrs_geom_column Name of the column of type SDO_GEOMETRY in the table for the spatial LRS geometries. path_table_name Name of the path table to be created. (The path table is explained in Section 5.8.3.) path_geom_column Name of the column of type SDO_GEOMETRY in the path table. path_link_table_name Name of the path-link table to be created. (The path-link table is explained in Section 5.8.4.) is_complex Reserved for future use. Ignored for the current release. Usage Notes This procedure creates a spatial LRS network in a network memory object, the use of which is explained in Section 5.7. This procedure provides a convenient way to create a spatial LRS network when the node, link, and optional related tables do not already exist. The procedure creates the network; creates the node, link, path, and path-link tables for the network; and inserts the appropriate information in the xxx_SDO_NETWORK_METADATA views (described in Section 5.9.1). Examples The following example creates an LRS network named MY_LRS_NET. The network has one hierarchy level, is undirected (’FALSE’ for is_directed), is based on SRID 8307, and has three-dimensional geometries. EXECUTE SDO_NET_MEM.NETWORK_MANAGER.CREATE_LRS_NETWORK('MY_LRS_NET', 1, 'FALSE', 8307, 3, 'MY_NODE_TABLE', 'COST', 'MY_LINK_TABLE', 'COST', 'MY_LRS_TABLE', 'GEOM', 'MY_PATH_TABLE', 'GEOM', 'MY_PATHLINK_TABLE', 'FALSE'); 7-50 Oracle Spatial Topology and Network Data Models SDO_NET_MEM.NETWORK_MANAGER.CREATE_REF_CONSTRAINTS SDO_NET_MEM.NETWORK_MANAGER.CREATE_REF_CONSTRAINTS Format SDO_NET_MEM.NETWORK_MANAGER.CREATE_REF_CONSTRAINTS( network IN VARCHAR2); Description Creates referential integrity constraints on the link and path tables. Parameters network Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. Usage Notes This procedure creates referential integrity constraints on the link and path tables in a network memory object, the use of which is explained in Section 5.7. When the referential integrity constraints are created, they are automatically enabled. You can disable the referential integrity constrains by calling the SDO_NET_ MEM.NETWORK_MANAGER.DISABLE_REF_CONSTRAINTS procedure, and enable them again by calling the SDO_NET_MEM.NETWORK_MANAGER.ENABLE_ REF_CONSTRAINTS procedure. This procedure is analogous to using the createRefConstraints method of the NetworkManager class of the client-side Java API (described in Section 5.10.2). Examples The following example creates referential integrity constraints on the link and path tables in the network memory object for the network named ROADS_NETWORK. EXECUTE SDO_NET_MEM.NETWORK_MANAGER.CREATE_REF_CONSTRAINTS('ROADS_NETWORK'); SDO_NET_MEM Package Subprograms 7-51 SDO_NET_MEM.NETWORK_MANAGER.CREATE_SDO_NETWORK SDO_NET_MEM.NETWORK_MANAGER.CREATE_SDO_NETWORK Format SDO_NET_MEM.NETWORK_MANAGER.CREATE_SDO_NETWORK( network_name IN VARCHAR2, no_of_hierarchy_levels IN NUMBER, is_directed IN VARCHAR2, srid IN NUMBER, no_of_dims IN NUMBER, node_table_name IN VARCHAR2, node_geom_column IN VARCHAR2, node_cost_column IN VARCHAR2, link_table_name IN VARCHAR2, node_geom_column IN VARCHAR2, link_cost_column IN VARCHAR2, path_table_name IN VARCHAR2, node_geom_column IN VARCHAR2, path_link_table_name IN VARCHAR2, is_complex IN VARCHAR2 DEFAULT ’FALSE’); Description Creates a spatial network containing non-LRS SDO_GEOMETRY objects, creates all necessary tables, and updates the network metadata. Parameters network_name Name of the network. no_of_hierarchy_levels Number of hierarchy levels for links in the network. (For an explanation of network hierarchy, see Section 5.5.) is_directed A Boolean value. TRUE indicates that the links are directed; FALSE indicates that the links are undirected (not directed). srid Coordinate system (spatial reference system) associated with the network. Must be specified as either null (no coordinate system is associated) or a value from the SRID column of the SDO_COORD_REF_SYS table (described in Oracle Spatial User's Guide and Reference). no_of_dims Number of dimensions for the spatial data. 7-52 Oracle Spatial Topology and Network Data Models SDO_NET_MEM.NETWORK_MANAGER.CREATE_SDO_NETWORK node_table_name Name of the node table to be created. (The node table is explained in Section 5.8.1.) node_geom_column Name of the column of type SDO_GEOMETRY in the node table. (The node table is explained in Section 5.8.1.) node_cost_column Name of the cost column in the node table. (The node table is explained in Section 5.8.1.) link_table_name Name of the link table to be created. (The link table is explained in Section 5.8.2.) link_geom_column Name of the column of type SDO_GEOMETRY in the link table. (The link table is explained in Section 5.8.2.) link_cost_column Name of the cost column in the link table. (The link table is explained in Section 5.8.2.) path_table_name Name of the path table to be created. (The path table is explained in Section 5.8.3.) path_geom_column Name of the column of type SDO_GEOMETRY in the path table. (The path table is explained in Section 5.8.3.) path_link_table_name Name of the path-link table to be created. (The path-link table is explained in Section 5.8.4.) is_complex Reserved for future use. Ignored for the current release. Usage Notes This procedure creates a spatial (SDO) network in a network memory object, the use of which is explained in Section 5.7. This procedure provides a convenient way to create a spatial (SDO) network when the node, link, and optional related tables do not already exist. The procedure creates the network; creates the node, link, path, and path-link tables for the network; and inserts the appropriate information in the xxx_SDO_NETWORK_METADATA views (described in Section 5.9.1). Examples The following example creates an SDO network named MY_SDO_NET. The network has one hierarchy level, is undirected (’FALSE’ for is_directed), is based on SRID 8307, and has two-dimensional geometries. EXECUTE SDO_NET_MEM.NETWORK_MANAGER.CREATE_SDO_NETWORK('MY_SDO_NET', 1, 'FALSE', 8307, 2, 'MY_NODE_TABLE', 'GEOM', 'COST', 'MY_LINK_TABLE', 'GEOM', 'COST', 'MY_PATH_TABLE', 'GEOM', 'MY_PATHLINK_TABLE', 'FALSE'); SDO_NET_MEM Package Subprograms 7-53 SDO_NET_MEM.NETWORK_MANAGER.DISABLE_REF_CONSTRAINTS SDO_NET_MEM.NETWORK_MANAGER.DISABLE_REF_CONSTRAINTS Format SDO_NET_MEM.NETWORK_MANAGER.DISABLE_REF_CONSTRAINTS( network IN VARCHAR2); Description Disables referential integrity constraints on the link and path tables. Parameters network Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. Usage Notes This procedure disables referential integrity constraints (created using the SDO_NET_ MEM.NETWORK_MANAGER.CREATE_REF_CONSTRAINTS) on the link and path tables in a network memory object, the use of which is explained in Section 5.7. When the referential integrity constraints are created , they are automatically enabled. You can disable the referential integrity constrains by calling the SDO_NET_ MEM.NETWORK_MANAGER.DISABLE_REF_CONSTRAINTS procedure, and enable them again by calling the SDO_NET_MEM.NETWORK_MANAGER.ENABLE_ REF_CONSTRAINTS procedure. This procedure is analogous to using the disableRefConstraints method of the NetworkManager class of the client-side Java API (described in Section 5.10.2). Examples The following example disables the referential integrity constraints on the link and path tables in the network memory object for the network named ROADS_NETWORK. EXECUTE SDO_NET_MEM.NETWORK_MANAGER.DISABLE_REF_CONSTRAINTS('ROADS_NETWORK'); 7-54 Oracle Spatial Topology and Network Data Models SDO_NET_MEM.NETWORK_MANAGER.DROP_NETWORK SDO_NET_MEM.NETWORK_MANAGER.DROP_NETWORK Format SDO_NET_MEM.NETWORK_MANAGER.DROP_NETWORK( net_mem IN VARCHAR2); Description Drops (deletes) the network. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. Usage Notes This procedure deletes the network in a network memory object, the use of which is explained in Section 5.7. This procedure also deletes the node, link, and path tables associated with the network, and the network metadata for the network. This procedure is analogous to using the dropNetwork method of the NetworkManager class of the client-side Java API (described in Section 5.10.2). Examples The following example deletes the network in the network memory object for the network named ROADS_NETWORK. EXECUTE SDO_NET_MEM.NETWORK_MANAGER.DROP_NETWORK('ROADS_NETWORK'); SDO_NET_MEM Package Subprograms 7-55 SDO_NET_MEM.NETWORK_MANAGER.ENABLE_REF_CONSTRAINTS SDO_NET_MEM.NETWORK_MANAGER.ENABLE_REF_CONSTRAINTS Format SDO_NET_MEM.NETWORK_MANAGER.ENABLE_REF_CONSTRAINTS( network IN VARCHAR2); Description Enables referential integrity constraints on the link and path tables. Parameters network Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. Usage Notes This procedure enables referential integrity constraints (that had been disabled using the SDO_NET_MEM.NETWORK_MANAGER.DISABLE_REF_CONSTRAINTS procedure) on the link and path tables in a network memory object, the use of which is explained in Section 5.7. When the referential integrity constraints are created, they are automatically enabled. You can disable the referential integrity constrains by calling the SDO_NET_ MEM.NETWORK_MANAGER.DISABLE_REF_CONSTRAINTS procedure, and enable them again by calling the SDO_NET_MEM.NETWORK_MANAGER.ENABLE_ REF_CONSTRAINTS procedure. This procedure is analogous to using the enableRefConstraints method of the NetworkManager class of the client-side Java API (described in Section 5.10.2). Examples The following example enables the referential integrity constraints on the link and path tables in the network memory object for the network named ROADS_NETWORK. EXECUTE SDO_NET_MEM.NETWORK_MANAGER.ENABLE_REF_CONSTRAINTS('ROADS_NETWORK'); 7-56 Oracle Spatial Topology and Network Data Models SDO_NET_MEM.NETWORK_MANAGER.FIND_CONNECTED_COMPONENTS SDO_NET_MEM.NETWORK_MANAGER.FIND_CONNECTED_COMPONENTS Format SDO_NET_MEM.NETWORK_MANAGER.FIND_CONNECTED_COMPONENTS( net_mem IN VARCHAR2 ) RETURN NUMBER; Description Returns the number of groups of connected components. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. Usage Notes This function returns the number of connected components in the specified network memory object. For information about using a network memory object for editing and network analysis operations, see Section 5.7. Connected components are a group of nodes, connected by links, such that each node in the group can reach or be reached from all other nodes in the group. For example, the logical network shown in Example 5–5 in Section 5.11.4 contains two groups of connected components: in one group, all nodes in hierarchy level 1 can reach or be reached by all other nodes in that level; and in the other group, the two nodes in hierarchy level 2 can reach each other. Nodes that belong to the same component have the same component number. To get the component number for a node, use the SDO_NET_MEM.NODE.GET_ COMPONENT_NO function. To set the component number for a node, use the SDO_ NET_MEM.NODE.SET_COMPONENT_NO procedure. This function is analogous to using the findConnectedComponents method of the NetworkManager class of the client-side Java API (described in Section 5.10.2). Examples The following example returns the child links of the link whose link ID is 1001 in the current network memory object. (This example is an excerpt from Example 5–5 in Section 5.11.4.) res_numeric := SDO_NET_MEM.NETWORK_MANAGER.FIND_CONNECTED_COMPONENTS(net_mem); DBMS_OUTPUT.PUT_LINE('The number of connected components is: ' || res_numeric); . . . The number of connected components is: 2 SDO_NET_MEM Package Subprograms 7-57 SDO_NET_MEM.NETWORK_MANAGER.FIND_REACHABLE_NODES SDO_NET_MEM.NETWORK_MANAGER.FIND_REACHABLE_NODES Format SDO_NET_MEM.NETWORK_MANAGER.FIND_REACHABLE_NODES( net_mem IN VARCHAR2, source_node_id IN NUMBER, constraint IN VARCHAR2 DEFAULT NULL ) RETURN SDO_NUMBER_ARRAY; Description Returns the node ID numbers of nodes that can be reached by a path from a specified source node. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. source_node_id Node ID of the source node. constraint Name of the network constraint to be applied. If this parameter is null, no network constraint is applied. (For information about network constraints, see Section 5.6.) Usage Notes This function returns an SDO_NUMBER_ARRAY object of node ID values in the specified network memory object. For information about using a network memory object for editing and network analysis operations, see Section 5.7. This function is analogous to using the findReachableNodes method of the NetworkManager class of the client-side Java API (described in Section 5.10.2). Examples The following example nodes that can be reached from the node whose node ID is 101 in the current network memory object. (This example is an excerpt from Example 5–5 in Section 5.11.4.) res_array := SDO_NET_MEM.NETWORK_MANAGER.FIND_REACHABLE_NODES(net_mem,101); DBMS_OUTPUT.PUT_LINE('Reachable nodes from 101: '); FOR indx IN res_array.FIRST..res_array.LAST LOOP res_numeric := res_array(indx); DBMS_OUTPUT.PUT(res_numeric || ' '); END LOOP; DBMS_OUTPUT.PUT_LINE(' '); . . . Reachable nodes from 101: 103 102 104 106 105 107 108 109 110 113 111 112 114 7-58 Oracle Spatial Topology and Network Data Models SDO_NET_MEM.NETWORK_MANAGER.FIND_REACHING_NODES SDO_NET_MEM.NETWORK_MANAGER.FIND_REACHING_NODES Format SDO_NET_MEM.NETWORK_MANAGER.FIND_REACHING_NODES( net_mem IN VARCHAR2, target_node_id IN NUMBER ) RETURN SDO_NUMBER_ARRAY; Description Returns the node ID numbers of nodes that can reach (by a path) a specified target node. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. target_node_id Node ID of the target node. Usage Notes This function returns an SDO_NUMBER_ARRAY object of node ID values in the specified network memory object. For information about using a network memory object for editing and network analysis operations, see Section 5.7. This function is analogous to using the findReaching_Nodes method of the NetworkManager class of the client-side Java API (described in Section 5.10.2). Examples The following example nodes from which the node whose node ID is 101 in the current network memory object can be reached. (This example is an excerpt from Example 5–5 in Section 5.11.4.) res_array := SDO_NET_MEM.NETWORK_MANAGER.FIND_REACHING_NODES(net_mem,101); DBMS_OUTPUT.PUT_LINE('Nodes from which 101 can be reached: '); FOR indx IN res_array.FIRST..res_array.LAST LOOP res_numeric := res_array(indx); DBMS_OUTPUT.PUT(res_numeric || ' '); END LOOP; DBMS_OUTPUT.PUT_LINE(' '); . . . Nodes from which 101 can be reached: 103 102 104 106 105 107 108 109 110 113 111 112 114 SDO_NET_MEM Package Subprograms 7-59 SDO_NET_MEM.NETWORK_MANAGER.IS_REACHABLE SDO_NET_MEM.NETWORK_MANAGER.IS_REACHABLE Format SDO_NET_MEM.NETWORK_MANAGER.IS_REACHABLE( net_mem IN VARCHAR2, source_node_id IN NUMBER, target_node_id IN NUMBER, constraint IN VARCHAR2 DEFAULT NULL ) RETURN VARCHAR2; Description Checks if a specified target node can be reached by a path from a specified source node. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. source_node_id Node ID of the source node. target_node_id Node ID of the target node. constraint Name of the network constraint to be applied. If this parameter is null, no network constraint is applied. (For information about network constraints, see Section 5.6.) Usage Notes This function returns the string TRUE if the target node can be reached from the source node, and the string FALSE if the target node cannot be reached from the source node. For information about using a network memory object for editing and network analysis operations, see Section 5.7. This function is analogous to using the isReachable method of the NetworkManager class of the client-side Java API (described in Section 5.10.2). Examples The following example returns the child links of the link whose link ID is 1001 in the current network memory object. (This example is an excerpt from Example 5–5 in Section 5.11.4.) res_string := SDO_NET_MEM.NETWORK_MANAGER.IS_REACHABLE(net_mem,101,105); DBMS_OUTPUT.PUT_LINE('Can node 101 reach node 105? ' || res_string); . . . Can node 101 reach node 105? TRUE 7-60 Oracle Spatial Topology and Network Data Models SDO_NET_MEM.NETWORK_MANAGER.LIST_NETWORKS SDO_NET_MEM.NETWORK_MANAGER.LIST_NETWORKS Format SDO_NET_MEM.NETWORK_MANAGER.LIST_NETWORKS() RETURN VARCHAR2; Description Returns a list of networks. Parameters None. Usage Notes This function returns a comma-delimited list of network names in the current network memory object. For information about using a network memory object for editing and network analysis operations, see Section 5.7. Examples The following example returns the names of all networks with network memory objects in the cache. (This example is an excerpt from Example 5–4 in Section 5.11.3.) res_string := SDO_NET_MEM.NETWORK_MANAGER.LIST_NETWORKS; DBMS_OUTPUT.PUT_LINE('The current in-memory network(s) is/are: ' || res_string); . . . The current in-memory network(s) is/are: ROADS_NETWORK SDO_NET_MEM Package Subprograms 7-61 SDO_NET_MEM.NETWORK_MANAGER.MCST_LINK SDO_NET_MEM.NETWORK_MANAGER.MCST_LINK Format SDO_NET_MEM.NETWORK_MANAGER.MCST_LINK( net_mem IN VARCHAR2 ) RETURN SDO_NUMBER_ARRAY; Description Returns the minimum cost spanning tree. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. Usage Notes This function returns an SDO_NUMBER_ARRAY object with the link ID values of links that make up the minimum cost spanning tree in the specified network memory object. The minimum cost spanning tree is the path with the lowest total cost that visits all nodes in the network memory object. For information about using a network memory object for editing and network analysis operations, see Section 5.7. The Kruskal algorithm is used to determine the minimum cost spanning tree. This function is analogous to using the mcstLinkArray method of the NetworkManager class of the client-side Java API (described in Section 5.10.2). Examples The following example returns the links in the minimum cost spanning tree of the current network memory object. (This example is an excerpt from Example 5–5 in Section 5.11.4.) res_array := SDO_NET_MEM.NETWORK_MANAGER.MCST_LINK(net_mem); DBMS_OUTPUT.PUT('Network ' || net_mem || ' has the following MCST links: '); FOR indx IN res_array.FIRST..res_array.LAST LOOP DBMS_OUTPUT.PUT(res_array(indx) || ' '); END LOOP; DBMS_OUTPUT.PUT_LINE(' '); . . . Network XYZ_NETWORK has the following MCST links: 1001 1101 1104 1107 1110 1114 1117 1102 1105 1108 1111 1115 1118 1113 7-62 Oracle Spatial Topology and Network Data Models SDO_NET_MEM.NETWORK_MANAGER.NEAREST_NEIGHBORS SDO_NET_MEM.NETWORK_MANAGER.NEAREST_NEIGHBORS Format SDO_NET_MEM.NETWORK_MANAGER.NEAREST_NEIGHBORS( net_mem IN VARCHAR2, start_node_id IN NUMBER, no_of_neighbors IN NUMBER, constraint IN VARCHAR2 DEFAULT NULL ) RETURN SDO_NUMBER_ARRAY; Description Returns the path ID numbers of paths leading to nodes that are the nearest neighbors (determined by total cost) of a specified start node. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. start_node_id Node ID of the start node. no_of_neighbors Maximum number of path IDs to return. constraint Name of the network constraint to be applied. If this parameter is null, no network constraint is applied. (For information about network constraints, see Section 5.6.) Usage Notes This function returns an SDO_NUMBER_ARRAY object of path ID values in the specified network memory object. For information about using a network memory object for editing and network analysis operations, see Section 5.7. To determine the end node in each path returned, use the SDO_NET_ MEM.PATH.GET_END_NODE_ID function. To determine the links in each path returned, use the SDO_NET_MEM.PATH.GET_LINK_IDS function. This function is analogous to using the nearestNeighbors method of the NetworkManager class of the client-side Java API (described in Section 5.10.2). Examples The following example returns the path IDs of the paths to the three nodes nearest to the node whose node ID is 101 in the current network memory object. It also displays the link IDs for each link in each of the returned paths. (This example is an excerpt from Example 5–5 in Section 5.11.4.) res_array := SDO_NET_MEM.NETWORK_MANAGER.NEAREST_NEIGHBORS(net_mem,101,3); DBMS_OUTPUT.PUT_LINE('Path IDs to the nearest 3 neighbors of node 101 are: '); FOR indx IN res_array.FIRST..res_array.LAST SDO_NET_MEM Package Subprograms 7-63 SDO_NET_MEM.NETWORK_MANAGER.NEAREST_NEIGHBORS LOOP res_numeric := res_array(indx); DBMS_OUTPUT.PUT(res_numeric || ', which contains links: '); var1_array := SDO_NET_MEM.PATH.GET_LINK_IDS(net_mem, res_numeric); FOR indx1 IN var1_array.FIRST..var1_array.LAST LOOP var1_numeric := var1_array(indx1); DBMS_OUTPUT.PUT(var1_numeric || ' '); END LOOP; DBMS_OUTPUT.PUT_LINE(' '); END LOOP; . . . Path IDs to the nearest 3 neighbors of node 101 are: 1, which contains links: 1101 2, which contains links: 1102 3, which contains links: 1102 1104 7-64 Oracle Spatial Topology and Network Data Models SDO_NET_MEM.NETWORK_MANAGER.READ_NETWORK SDO_NET_MEM.NETWORK_MANAGER.READ_NETWORK Format SDO_NET_MEM.NETWORK_MANAGER.READ_NETWORK( network IN VARCHAR2, allow_updates IN VARCHAR2); or SDO_NET_MEM.NETWORK_MANAGER.READ_NETWORK( network IN VARCHAR2, link_level IN NUMBER, allow_updates IN VARCHAR2); Description Creates a network memory object in virtual memory cache containing all network objects in a network or in a level in a hierarchical network. Parameters network Name of the network from which to add network objects (nodes, links, paths) into the network memory object. link_level Hierarchy level in a hierarchical network from which to add network objects into the network memory object. If you use the format without this parameter, all network objects in the network are added to the network memory object. allow_updates TRUE specifies that the network memory object is updatable; that is, you can perform editing operations in the cache. FALSE specifies that the network memory object is read-only; that is, you cannot perform editing operations in the cache. Usage Notes This procedure creates a network memory object, the use of which is explained in Section 5.7. For better performance, if you only need to retrieve information or to perform network analysis operations, specify the string FALSE for the allow_updates parameter. This procedure is analogous to using the readNetwork method of the NetworkManager class of the client-side Java API (described in Section 5.10.2). Examples The following example places a copy of all network objects in the network named NET_LOGICAL into an updatable (’TRUE’ for allow_updates) network memory object. SDO_NET_MEM.NETWORK_MANAGER.READ_NETWORK(’NET_LOGICAL’, 'TRUE'); SDO_NET_MEM Package Subprograms 7-65 SDO_NET_MEM.NETWORK_MANAGER.SHORTEST_PATH SDO_NET_MEM.NETWORK_MANAGER.SHORTEST_PATH Format SDO_NET_MEM.NETWORK_MANAGER.SHORTEST_PATH( net_mem IN VARCHAR2, start_node_id IN NUMBER, goal_node_id IN NUMBER, constraint IN VARCHAR2 DEFAULT NULL ) RETURN NUMBER; Description Returns the path ID number of the shortest path (based on the A* search algorithm, and considering costs) between a start node and a goal (end) node. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. start_node_id Node ID of the start node. goal_node_id Node ID of the goal (end) node. constraint Name of the network constraint to be applied. If this parameter is null, no network constraint is applied. (For information about network constraints, see Section 5.6.) Usage Notes This function returns a path ID value in the specified network memory object. For information about using a network memory object for editing and network analysis operations, see Section 5.7. This function returns a null value if no path can be made between the specified nodes. For example, if the state of one or more nodes or links is INACTIVE, and if this condition causes all possible paths to be ignored, the function will return a null value. To determine the links in the returned path, use the SDO_NET_MEM.PATH.GET_ LINK_IDS function. This function is analogous to using the shortestPath method of the NetworkManager class of the client-side Java API (described in Section 5.10.2). Examples The following example returns the path ID of the shortest path between the nodes with node ID values 101 and 105 in the current network memory object. (This example is an excerpt from Example 5–5 in Section 5.11.4.) res_numeric := SDO_NET_MEM.NETWORK_MANAGER.SHORTEST_PATH(net_mem,101,105); 7-66 Oracle Spatial Topology and Network Data Models SDO_NET_MEM.NETWORK_MANAGER.SHORTEST_PATH DBMS_OUTPUT.PUT_LINE('The shortest path from node 101 to node 105 is path ID: ' || res_numeric); SDO_NET_MEM Package Subprograms 7-67 SDO_NET_MEM.NETWORK_MANAGER.SHORTEST_PATH_DIJKSTRA SDO_NET_MEM.NETWORK_MANAGER.SHORTEST_PATH_DIJKSTRA Format SDO_NET_MEM.NETWORK_MANAGER.SHORTEST_PATH_DIJKSTRA( net_mem IN VARCHAR2, start_node_id IN NUMBER, goal_node_id IN NUMBER, constraint IN VARCHAR2 DEFAULT NULL ) RETURN NUMBER; Description Returns the path ID number of the shortest path (based on the Dijkstra search algorithm, and considering costs) between a start node and a goal (end) node. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. start_node_id Node ID of the start node. goal_node_id Node ID of the goal (end) node. constraint Name of the network constraint to be applied. If this parameter is null, no network constraint is applied. (For information about network constraints, see Section 5.6.) Usage Notes This function returns a path ID value in the specified network memory object. For information about using a network memory object for editing and network analysis operations, see Section 5.7. This function returns a null value if no path can be made between the specified nodes. For example, if the state of one or more nodes or links is INACTIVE, and if this condition causes all possible paths to be ignored, the function will return a null value. To determine the links in the returned path, use the SDO_NET_MEM.PATH.GET_ LINK_IDS function. This function is analogous to using the shortestPathDijkstra method of the NetworkManager class of the client-side Java API (described in Section 5.10.2). Examples The following example returns the path ID of the shortest path (based on the Dijkstra search algorithm, and considering costs) between the nodes with node ID values 101 and 105 in the current network memory object. It also displays information about the returned path. (This example is an excerpt from Example 5–5 in Section 5.11.4.) 7-68 Oracle Spatial Topology and Network Data Models SDO_NET_MEM.NETWORK_MANAGER.SHORTEST_PATH_DIJKSTRA res_numeric := SDO_NET_MEM.NETWORK_MANAGER.SHORTEST_PATH_DIJKSTRA(net_ mem,101,105); DBMS_OUTPUT.PUT_LINE('The shortest Dijkstra path from node 101 to node 105 is ' || res_numeric); DBMS_OUTPUT.PUT_LINE('The following are characteristics of this shortest path: '); cost := SDO_NET_MEM.PATH.GET_COST(net_mem, res_numeric); DBMS_OUTPUT.PUT_LINE('Path ' || res_numeric || ' cost: ' || cost); res_string := SDO_NET_MEM.PATH.IS_CLOSED(net_mem, res_numeric); DBMS_OUTPUT.PUT_LINE('Is path ' || res_numeric || ' closed? ' || res_string); res_array := SDO_NET_MEM.PATH.GET_LINK_IDS(net_mem, res_numeric); DBMS_OUTPUT.PUT('Path ' || res_numeric || ' has links: '); FOR indx IN res_array.FIRST..res_array.LAST LOOP DBMS_OUTPUT.PUT(res_array(indx) || ' '); END LOOP; DBMS_OUTPUT.PUT_LINE(' '); res_array := SDO_NET_MEM.PATH.GET_NODE_IDS(net_mem, res_numeric); DBMS_OUTPUT.PUT('Path ' || res_numeric || ' has nodes: '); FOR indx IN res_array.FIRST..res_array.LAST LOOP DBMS_OUTPUT.PUT(res_array(indx) || ' '); END LOOP; DBMS_OUTPUT.PUT_LINE(' '); . . . The shortest Dijkstra path from node 101 to node 105 is 13 The following are characteristics of this shortest path: Path 13 cost: 50 Is path 13 closed? FALSE Path 13 has links: 1102 1104 1105 Path 13 has nodes: 101 103 104 105 SDO_NET_MEM Package Subprograms 7-69 SDO_NET_MEM.NETWORK_MANAGER.TSP_PATH SDO_NET_MEM.NETWORK_MANAGER.TSP_PATH Format SDO_NET_MEM.NETWORK_MANAGER.TSP_PATH( net_mem IN VARCHAR2, nd_array IN SDO_NUMBER_ARRAY, is_closed IN VARCHAR2, use_exact_cost IN VARCHAR2, constraint IN VARCHAR2 DEFAULT NULL ) RETURN NUMBER; Description Returns the path ID number of the most efficient (in cost or distance) path that includes all specified nodes, that is, the path that solves the "traveling salesman problem" (TSP) for the specified set of nodes. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. nd_array An SDO_NUMBER_ARRAY object specifying the node ID numbers of the nodes to be included in the path. The first node specified is always the start node of the returned path. For a closed path, the first node specified is also the last node of the returned path; for an open path, the last node specified is the last node of the returned path. is_closed The string value TRUE if the path must be closed (that is, start node and end node in returned path are the same node), or the string value FALSE if the path must be open (that is, end node in the returned path is different from the start node). use_exact_cost The string value TRUE if the cost values of links are to be used in calculating the TSP path, or the string value FALSE if the Cartesian distances of links are to be used in calculating the TSP path. constraint Name of the network constraint to be applied. If this parameter is null, no network constraint is applied. (For information about network constraints, see Section 5.6.) Usage Notes This function returns a path ID value in the specified network memory object. For information about using a network memory object for editing and network analysis operations, see Section 5.7. This function returns a null value if no TSP path can be made using the specified nodes. For example, if the state of one or more nodes or links is INACTIVE, and if this condition causes all possible paths to be ignored, the function will return a null value. 7-70 Oracle Spatial Topology and Network Data Models SDO_NET_MEM.NETWORK_MANAGER.TSP_PATH If multiple possible paths can be constructed that meet all requirements of the request (for example, if two paths have the same lowest total cost), the returned path can be any of these possible paths. To determine the links in the returned path, use the SDO_NET_MEM.PATH.GET_ LINK_IDS function. This function is analogous to using the tspPath method of the NetworkManager class of the client-side Java API (described in Section 5.10.2). Examples The following example returns the path ID of the open TSP path that starts at node ID 2, ends at node ID 6, and includes node ID 4 in the current network memory object. (This example is an excerpt from Example 5–4 in Section 5.11.3.) res_numeric := SDO_NET_MEM.NETWORK_MANAGER.TSP_PATH(net_mem, sdo_number_array(2, 4, 6), 'FALSE', 'TRUE'); DBMS_OUTPUT.PUT_LINE('Open TSP path ID for N2, N4, N6: ' || res_numeric); DBMS_OUTPUT.PUT_LINE('which contains these links: '); var1_array := SDO_NET_MEM.PATH.GET_LINK_IDS(net_mem, res_numeric); FOR indx1 IN var1_array.FIRST..var1_array.LAST LOOP var1_numeric := var1_array(indx1); DBMS_OUTPUT.PUT(var1_numeric || ' '); END LOOP; DBMS_OUTPUT.PUT_LINE(' '); . . . Open TSP path ID for N2, N4, N6: 4 which contains these links: 102 103 104 105 SDO_NET_MEM Package Subprograms 7-71 SDO_NET_MEM.NETWORK_MANAGER.VALIDATE_NETWORK_SCHEMA SDO_NET_MEM.NETWORK_MANAGER.VALIDATE_NETWORK_SCHEMA Format SDO_NET_MEM.NETWORK_MANAGER.VALIDATE_NETWORK_SCHEMA( net_mem IN VARCHAR2 ) RETURN VARCHAR2; Description Validates the network tables. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. Usage Notes This function returns the string TRUE if the network-related tables in the specified network memory object are valid, and it returns a specific Oracle error message if one or more tables are not valid. For information about using a network memory object for editing and network analysis operations, see Section 5.7. This function is analogous to using the validateNetworkSchema method of the NetworkManager class of the client-side Java API (described in Section 5.10.2). Examples The following example validates the network tables in the current network memory object. (This example is an excerpt from Example 5–5 in Section 5.11.4.) res_string := SDO_NET_MEM.NETWORK_MANAGER.VALIDATE_NETWORK_SCHEMA(net_mem); 23 DBMS_OUTPUT.PUT_LINE('Is network ' || net_mem || ' valid? ' || res_string); . . . Is network XYZ_NETWORK valid? TRUE 7-72 Oracle Spatial Topology and Network Data Models SDO_NET_MEM.NETWORK_MANAGER.WITHIN_COST SDO_NET_MEM.NETWORK_MANAGER.WITHIN_COST Format SDO_NET_MEM.NETWORK_MANAGER.WITHIN_COST( net_mem IN VARCHAR2, start_node_id IN NUMBER, cost_limit IN NUMBER, constraint IN VARCHAR2 DEFAULT NULL ) RETURN SDO_NUMBER_ARRAY; Description Returns an array of path IDs of the shortest path to each node that is reachable within a specified cost from a specified start node. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. start_node_id Node ID of the start node. cost_limit Maximum total path cost. constraint Name of the network constraint to be applied. If this parameter is null, no network constraint is applied. (For information about network constraints, see Section 5.6.) Usage Notes This function returns an SDO_NUMBER_ARRAY object of path ID values in the specified network memory object. For information about using a network memory object for editing and network analysis operations, see Section 5.7. To determine the end node in each path returned, use the SDO_NET_ MEM.PATH.GET_END_NODE_ID function. To determine the links in each path returned, use the SDO_NET_MEM.PATH.GET_LINK_IDS function. This function is analogous to using the withinCost method of the NetworkManager class of the client-side Java API (described in Section 5.10.2). Examples The following example returns the path ID values of the shortest path to each node in the current network memory object that is reachable within a cost of 100 from the node with the node ID value of 102. It also displays the end node for each returned path. (This example is an excerpt from Example 5–5 in Section 5.11.4.) res_array := SDO_NET_MEM.NETWORK_MANAGER.WITHIN_COST(net_mem,102,100); DBMS_OUTPUT.PUT('Shortest path IDs to nodes within cost of 100 from node 102: '); DBMS_OUTPUT.PUT_LINE(' '); SDO_NET_MEM Package Subprograms 7-73 SDO_NET_MEM.NETWORK_MANAGER.WITHIN_COST FOR indx IN res_array.FIRST..res_array.LAST LOOP res_numeric := res_array(indx); DBMS_OUTPUT.PUT(res_numeric || ', whose end node is: '); var1_numeric := SDO_NET_MEM.PATH.GET_END_NODE_ID(net_mem, res_numeric); DBMS_OUTPUT.PUT(var1_numeric); DBMS_OUTPUT.PUT_LINE(' '); END LOOP; . . . Shortest path IDs to nodes within cost of 100 from node 102: 14, whose end node is: 101 15, whose end node is: 103 16, whose end node is: 104 17, whose end node is: 105 18, whose end node is: 106 19, whose end node is: 108 20, whose end node is: 107 7-74 Oracle Spatial Topology and Network Data Models SDO_NET_MEM.NETWORK_MANAGER.WRITE_NETWORK SDO_NET_MEM.NETWORK_MANAGER.WRITE_NETWORK Format SDO_NET_MEM.NETWORK_MANAGER.WRITE_NETWORK( net_mem IN VARCHAR2); Description Saves to the database the network objects in a network memory object. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. Usage Notes This procedure saves the network objects in a network memory object, the use of which is explained in Section 5.7. Temporary links, nodes, and paths are not saved in the database when you call this procedure. This procedure is analogous to using the writeNetwork method of the NetworkManager class of the client-side Java API (described in Section 5.10.2). Examples The following example saves to the database the network objects in the network memory object for a network named XYZ_NETWORK. sdo_net_mem.network_manager.write_network(net_mem=>'XYZ_NETWORK'); SDO_NET_MEM Package Subprograms 7-75 SDO_NET_MEM.NODE.GET_ADJACENT_NODE_IDS SDO_NET_MEM.NODE.GET_ADJACENT_NODE_IDS Format SDO_NET_MEM.NODE.GET_ADJACENT_NODE_IDS( net_mem IN VARCHAR2, node_id IN NUMBER ) RETURN SDO_NUMBER_ARRAY; Description Returns the node ID numbers of nodes that are adjacent to a specified node. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. node_id Node ID number. Usage Notes This function returns an SDO_NUMBER_ARRAY object of node ID values in the specified network memory object. For information about using a network memory object for editing and network analysis operations, see Section 5.7. This function is analogous to using the getAdjacentNodeArray method of the Node interface of the client-side Java API (described in Section 5.10.2). Examples The following example returns the nodes adjacent to the node whose node ID is 103 in the current network memory object. (This example is an excerpt from Example 5–5 in Section 5.11.4.) res_array := SDO_NET_MEM.NODE.GET_ADJACENT_NODE_IDS(net_mem, 103); DBMS_OUTPUT.PUT('Node 103 has the following adjacent nodes: '); FOR indx IN res_array.FIRST..res_array.LAST LOOP DBMS_OUTPUT.PUT(res_array(indx) || ' '); END LOOP; DBMS_OUTPUT.PUT_LINE(' '); Node 103 has the following adjacent nodes: 102 104 101 7-76 Oracle Spatial Topology and Network Data Models SDO_NET_MEM.NODE.GET_CHILD_NODE_IDS SDO_NET_MEM.NODE.GET_CHILD_NODE_IDS Format SDO_NET_MEM.NODE.GET_CHILD_NODE_IDS( net_mem IN VARCHAR2, node_id IN NUMBER ) RETURN SDO_NUMBER_ARRAY; Description Returns the node ID numbers of nodes that are child nodes of a specified node. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. node_id Node ID number. Usage Notes This function returns an SDO_NUMBER_ARRAY object of node ID values in the specified network memory object. For information about using a network memory object for editing and network analysis operations, see Section 5.7. This function is analogous to using the getChildNodeArray method of the Node interface of the client-side Java API (described in Section 5.10.2). For information about parent and child nodes and links in a network hierarchy, see Section 5.5. Examples The following example returns the child nodes of the node whose node ID is 1 in the current network memory object. (This example is an excerpt from Example 5–5 in Section 5.11.4.) res_array := SDO_NET_MEM.NODE.GET_CHILD_NODE_IDS(net_mem, 1); DBMS_OUTPUT.PUT('Node 1 has the following child nodes: '); FOR indx IN res_array.FIRST..res_array.LAST LOOP DBMS_OUTPUT.PUT(res_array(indx) || ' '); END LOOP; . . . Node 1 has the following child nodes: 104 103 105 102 106 101 SDO_NET_MEM Package Subprograms 7-77 SDO_NET_MEM.NODE.GET_COMPONENT_NO SDO_NET_MEM.NODE.GET_COMPONENT_NO Format SDO_NET_MEM.NODE.GET_COMPONENT_NO( net_mem IN VARCHAR2, node_id IN NUMBER ) RETURN NUMBER; Description Returns the component number of a specified node. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. node_id Node ID number. Usage Notes This function returns a numeric component number for a node in the specified network memory object. For information about using a network memory object for editing and network analysis operations, see Section 5.7. All nodes in a group of connected components have the same component number. For an explanation of connected components, see the Usage Notes for the SDO_NET_ MEM.NETWORK_MANAGER.FIND_CONNECTED_COMPONENTS function. This function is analogous to using the getComponentNo method of the Node interface of the client-side Java API (described in Section 5.10.2). To set the component number for a node, use the SDO_NET_MEM.NODE.SET_ COMPONENT_NO procedure. Examples The following example returns the component number of the node whose node ID is 103 in the current network memory object. (This example is an excerpt from Example 5–5 in Section 5.11.4.) res_numeric := SDO_NET_MEM.NODE.GET_COMPONENT_NO(net_mem, 103); DBMS_OUTPUT.PUT_LINE('The component number of node 103 is: ' || res_numeric); . . . The component number of node 103 is: 1 7-78 Oracle Spatial Topology and Network Data Models SDO_NET_MEM.NODE.GET_COST SDO_NET_MEM.NODE.GET_COST Format SDO_NET_MEM.NODE.GET_COST( net_mem IN VARCHAR2, node_id IN NUMBER ) RETURN NUMBER; Description Returns the cost value of a specified node. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. node_id Node ID number. Usage Notes This function returns a numeric cost value for a node in the specified network memory object. For information about using a network memory object for editing and network analysis operations, see Section 5.7. This function is analogous to using the getCost method of the Node interface of the client-side Java API (described in Section 5.10.2). To set the cost value for a node, use the SDO_NET_MEM.NODE.SET_COST procedure. Examples The following example returns the cost of the node whose node ID is 103 in the current network memory object. (This example is an excerpt from Example 5–5 in Section 5.11.4.) res_numeric := SDO_NET_MEM.NODE.GET_COST(net_mem, 103); DBMS_OUTPUT.PUT_LINE('The cost of node 103 is: ' || res_numeric); . . . The cost of node 103 is: 0 SDO_NET_MEM Package Subprograms 7-79 SDO_NET_MEM.NODE.GET_EXTERNAL_NETWORK_ID SDO_NET_MEM.NODE.GET_EXTERNAL_NETWORK_ID Format SDO_NET_MEM.NODE.GET_EXTERNAL_NETWORK_ID( net_mem IN VARCHAR2, node_id IN NUMBER ) RETURN NUMBER; Description Returns the external network ID number for a node, if it is an external node. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. node_id Node ID number. Usage Notes This function returns a numeric network ID value for a node in the specified network memory object. For information about using a network memory object for editing and network analysis operations, see Section 5.7. This function is analogous to using the getExternalNetworkID method of the Node interface of the client-side Java API (described in Section 5.10.2). To set the external network ID value for a node, use the SDO_NET_MEM.NODE.SET_ EXTERNAL_NETWORK_ID procedure. Examples The following example returns the external network ID for the node whose node ID is 103 in the current network memory object. In this case, a null value is returned because node 103 is not in an external network. (This example is an excerpt from Example 5–5 in Section 5.11.4.) res_numeric := SDO_NET_MEM.NODE.GET_EXTERNAL_NETWORK_ID(net_mem, 103); DBMS_OUTPUT.PUT_LINE('The external network ID for node 103 is: ' || res_numeric); . . . The external network ID for node 103 is: 7-80 Oracle Spatial Topology and Network Data Models SDO_NET_MEM.NODE.GET_EXTERNAL_NETWORK_NAME SDO_NET_MEM.NODE.GET_EXTERNAL_NETWORK_NAME Format SDO_NET_MEM.NODE.GET_EXTERNAL_NETWORK_NAME( net_mem IN VARCHAR2, node_id IN NUMBER ) RETURN VARCHAR2; Description Returns the external network name for a node, if it is an external node. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. node_id Node ID number. Usage Notes This function returns a string network name value for a node in the specified network memory object. For information about using a network memory object for editing and network analysis operations, see Section 5.7. This function is analogous to using the getExternalNetworkName method of the Node interface of the client-side Java API (described in Section 5.10.2). Examples The following example returns the external network name for the node whose node ID is 103 in the current network memory object. In this case, a null value is returned because node 103 is not in an external network. (This example is an excerpt from Example 5–5 in Section 5.11.4.) res_string := SDO_NET_MEM.NODE.GET_EXTERNAL_NETWORK_NAME(net_mem, 103); DBMS_OUTPUT.PUT_LINE('The external network name for node 103 is: ' || res_ numeric); . . . The external network name for node 103 is: SDO_NET_MEM Package Subprograms 7-81 SDO_NET_MEM.NODE.GET_EXTERNAL_NODE_ID SDO_NET_MEM.NODE.GET_EXTERNAL_NODE_ID Format SDO_NET_MEM.NODE.GET_EXTERNAL_NODE_ID( net_mem IN VARCHAR2, node_id IN NUMBER ) RETURN NUMBER; Description Returns the node ID number of a node, if it is an external node. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. node_id Node ID number. Usage Notes This function returns a numeric node ID value for a node in the specified network memory object. For information about using a network memory object for editing and network analysis operations, see Section 5.7. This function is analogous to using the getExternalNodeID method of the Node interface of the client-side Java API (described in Section 5.10.2). To set the external node ID value for a node, use the SDO_NET_MEM.NODE.SET_ EXTERNAL_NODE_ID procedure. Examples The following example returns the external node ID of the node whose node ID is 103 in the current network memory object. In this case, a null value is returned because node 103 is not in an external network. (This example is an excerpt from Example 5–5 in Section 5.11.4.) res_numeric := SDO_NET_MEM.NODE.GET_EXTERNAL_NODE_ID(net_mem, 103); DBMS_OUTPUT.PUT_LINE('The external node ID of node 103 is: ' || res_numeric); . . . The external node ID of node 103 is: 7-82 Oracle Spatial Topology and Network Data Models SDO_NET_MEM.NODE.GET_GEOM_ID SDO_NET_MEM.NODE.GET_GEOM_ID Format SDO_NET_MEM.NODE.GET_GEOM_ID( net_mem IN VARCHAR2, node_id IN NUMBER ) RETURN NUMBER; Description Returns the geometry ID number of a node. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. node_id Node ID number. Usage Notes This function returns a numeric geometry ID value for a node in the specified network memory object. For information about using a network memory object for editing and network analysis operations, see Section 5.7. This function is analogous to using the getGeomID method of the Node interface of the client-side Java API (described in Section 5.10.2). To set the geometry ID value for a node, use the SDO_NET_MEM.NODE.SET_GEOM_ ID procedure. Examples The following example returns the geometry ID of the node whose node ID is 3 in the current network memory object. (This example is an excerpt from Example 5–4 in Section 5.11.3.) res_numeric := SDO_NET_MEM.NODE.GET_GEOM_ID(net_mem, 3); DBMS_OUTPUT.PUT_LINE('The geometry ID of node 3 is: ' || res_numeric); . . . The geometry ID of node 3 is: 1001 SDO_NET_MEM Package Subprograms 7-83 SDO_NET_MEM.NODE.GET_GEOMETRY SDO_NET_MEM.NODE.GET_GEOMETRY Format SDO_NET_MEM.NODE.GET_GEOMETRY( net_mem IN VARCHAR2, node_id IN NUMBER ) RETURN SDO_GEOMETRY; Description Returns the spatial geometry for a node. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. node_id Node ID number. Usage Notes This function returns an SDO_GEOMETRY object for a node in the specified network memory object. For information about using a network memory object for editing and network analysis operations, see Section 5.7. This function is analogous to using the getGeometry method of the Node interface of the client-side Java API (described in Section 5.10.2). To set the spatial geometry for a node, use the SDO_NET_MEM.NODE.SET_ GEOMETRY procedure. Examples The following example returns the spatial geometry of the node whose node ID is 3 in the current network memory object. (This example is an excerpt from Example 5–4 in Section 5.11.3.) res_geom := SDO_NET_MEM.NODE.GET_GEOMETRY(net_mem, 3); 7-84 Oracle Spatial Topology and Network Data Models SDO_NET_MEM.NODE.GET_HIERARCHY_LEVEL SDO_NET_MEM.NODE.GET_HIERARCHY_LEVEL Format SDO_NET_MEM.NODE.GET_HIERARCHY_LEVEL( net_mem IN VARCHAR2, node_id IN NUMBER ) RETURN NUMBER; Description Returns the hierarchy level of a node. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. node_id Node ID number. Usage Notes This function returns a numeric hierarchy level for a node in the specified network memory object. For information about using a network memory object for editing and network analysis operations, see Section 5.7. This function is analogous to using the getHierarchyLevel method of the Node interface of the client-side Java API (described in Section 5.10.2). To set the hierarchy level for a node, use the SDO_NET_MEM.NODE.SET_ HIERARCHY_LEVEL procedure. For information about parent and child nodes and links in a network hierarchy, see Section 5.5. Examples The following example returns the hierarchy level of the node whose node ID is 1 in the current network memory object. (This example is an excerpt from Example 5–5 in Section 5.11.4.) res_numeric := SDO_NET_MEM.NODE.GET_HIERARCHY_LEVEL(net_mem, 1); DBMS_OUTPUT.PUT_LINE('The hierarchy level of node 1 is: ' || res_numeric); . . . The hierarchy level of node 1 is: 2 SDO_NET_MEM Package Subprograms 7-85 SDO_NET_MEM.NODE.GET_IN_LINK_IDS SDO_NET_MEM.NODE.GET_IN_LINK_IDS Format SDO_NET_MEM.NODE.GET_IN_LINK_IDS( net_mem IN VARCHAR2, node_id IN NUMBER ) RETURN SDO_NUMBER_ARRAY; Description Returns the link ID numbers of links that are inbound links to a node. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. node_id Node ID number. Usage Notes This function returns an SDO_NUMBER_ARRAY object of link ID values in the specified network memory object. For information about using a network memory object for editing and network analysis operations, see Section 5.7. This function is analogous to using the getInLinks method of the Node interface of the client-side Java API (described in Section 5.10.2). Examples The following example returns the inbound links to the node whose node ID is 103 in the current network memory object. (This example is an excerpt from Example 5–5 in Section 5.11.4.) res_array := SDO_NET_MEM.NODE.GET_IN_LINK_IDS(net_mem, 103); DBMS_OUTPUT.PUT('Node 103 has the following inbound links: '); FOR indx IN res_array.FIRST..res_array.LAST LOOP DBMS_OUTPUT.PUT(res_array(indx) || ' '); END LOOP; . . . Node 103 has the following inbound links: 1102 1103 7-86 Oracle Spatial Topology and Network Data Models SDO_NET_MEM.NODE.GET_INCIDENT_LINK_IDS SDO_NET_MEM.NODE.GET_INCIDENT_LINK_IDS Format SDO_NET_MEM.NODE.GET_INCIDENT_LINK_IDS( net_mem IN VARCHAR2, node_id IN NUMBER ) RETURN SDO_NUMBER_ARRAY; Description Returns the link ID numbers of links that are to (that is, incident upon) a node. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. node_id Node ID number. Usage Notes This function returns an SDO_NUMBER_ARRAY object of link ID values in the specified network memory object. For information about using a network memory object for editing and network analysis operations, see Section 5.7. This function is analogous to using the getIncidentLinks method of the Node interface of the client-side Java API (described in Section 5.10.2). Examples The following example returns the incident links of the node whose node ID is 103 in the current network memory object. (This example is an excerpt from Example 5–5 in Section 5.11.4.) res_array := SDO_NET_MEM.NODE.GET_INCIDENT_LINK_IDS(net_mem, 103); DBMS_OUTPUT.PUT('Node 103 has the following incident links: '); FOR indx IN res_array.FIRST..res_array.LAST LOOP DBMS_OUTPUT.PUT(res_array(indx) || ' '); END LOOP; . . . Node 103 has the following incident links: 1102 1104 1103 SDO_NET_MEM Package Subprograms 7-87 SDO_NET_MEM.NODE.GET_MEASURE SDO_NET_MEM.NODE.GET_MEASURE Format SDO_NET_MEM.NODE.GET_MEASURE( net_mem IN VARCHAR2, node_id IN NUMBER ) RETURN NUMBER; Description Returns the measure value of a node in an LRS network. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. node_id Node ID number. Usage Notes This function returns a numeric measure value for a node in the specified network memory object. For information about using a network memory object for editing and network analysis operations, see Section 5.7. This function is analogous to using the getMeasure method of the Node interface of the client-side Java API (described in Section 5.10.2). To set the measure value for a node, use the SDO_NET_MEM.NODE.SET_MEASURE procedure. Examples The following example returns the measure value of the node whose node ID is 3 in the current network memory object. (This example is an excerpt from Example 5–4 in Section 5.11.3.) res_numeric := SDO_NET_MEM.NODE.GET_MEASURE(net_mem, 3); DBMS_OUTPUT.PUT_LINE('The measure value of node 3 is: ' || res_numeric); . . . The measure value of node 3 is: 8 7-88 Oracle Spatial Topology and Network Data Models SDO_NET_MEM.NODE.GET_NAME SDO_NET_MEM.NODE.GET_NAME Format SDO_NET_MEM.NODE.GET_NAME( net_mem IN VARCHAR2, node_id IN NUMBER ) RETURN VARCHAR2; Description Returns the name of a node. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. node_id Node ID number. Usage Notes This function returns a node name string for a node in the specified network memory object. For information about using a network memory object for editing and network analysis operations, see Section 5.7. This function is analogous to using the getName method of the Node interface of the client-side Java API (described in Section 5.10.2). To set the name of a node, use the SDO_NET_MEM.NODE.SET_NAME procedure. Examples The following example returns the name of the node whose node ID is 103 in the current network memory object. (This example is an excerpt from Example 5–5 in Section 5.11.4.) res_string := SDO_NET_MEM.NODE.GET_NAME(net_mem, 103); DBMS_OUTPUT.PUT_LINE('The name of node 103 is: ' || res_string); . . . The name of node 103 is: N3 SDO_NET_MEM Package Subprograms 7-89 SDO_NET_MEM.NODE.GET_OUT_LINK_IDS SDO_NET_MEM.NODE.GET_OUT_LINK_IDS Format SDO_NET_MEM.NODE.GET_OUT_LINK_IDS( net_mem IN VARCHAR2, node_id IN NUMBER ) RETURN SDO_NUMBER_ARRAY; Description Returns the link ID numbers of links that are outbound links from a node. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. node_id Node ID number. Usage Notes This function returns an SDO_NUMBER_ARRAY object of link ID values in the specified network memory object. For information about using a network memory object for editing and network analysis operations, see Section 5.7. This function is analogous to using the getOutLinks method of the Node interface of the client-side Java API (described in Section 5.10.2). Examples The following example returns the outbound links from the node whose node ID is 103 in the current network memory object. (This example is an excerpt from Example 5–5 in Section 5.11.4.) res_array := SDO_NET_MEM.NODE.GET_OUT_LINK_IDS(net_mem, 103); DBMS_OUTPUT.PUT('Node 103 has the following outbound links: '); FOR indx IN res_array.FIRST..res_array.LAST LOOP DBMS_OUTPUT.PUT(res_array(indx) || ' '); END LOOP; . . . Node 103 has the following outbound links: 1104 7-90 Oracle Spatial Topology and Network Data Models SDO_NET_MEM.NODE.GET_PARENT_NODE_ID SDO_NET_MEM.NODE.GET_PARENT_NODE_ID Format SDO_NET_MEM.NODE.GET_PARENT_NODE_ID( net_mem IN VARCHAR2, node_id IN NUMBER ) RETURN NUMBER; Description Returns the node ID number of the parent node of a node. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. node_id Node ID number. Usage Notes This function returns numeric node ID value in the specified network memory object. For information about using a network memory object for editing and network analysis operations, see Section 5.7. This function is analogous to using the getParentNode method of the Node interface of the client-side Java API (described in Section 5.10.2). To set the parent node of a node, use the SDO_NET_MEM.NODE.SET_PARENT_ NODE procedure. For information about parent and child nodes and links in a network hierarchy, see Section 5.5. Examples The following example returns the parent node of the node whose node ID is 103 in the current network memory object. (This example is an excerpt from Example 5–5 in Section 5.11.4.) res_numeric := SDO_NET_MEM.NODE.GET_PARENT_NODE_ID(net_mem, 103); DBMS_OUTPUT.PUT_LINE('The parent node of node 103 is: ' || res_numeric); . . . The parent node of node 103 is: 1 SDO_NET_MEM Package Subprograms 7-91 SDO_NET_MEM.NODE.GET_PARTITION_ID SDO_NET_MEM.NODE.GET_PARTITION_ID Format SDO_NET_MEM.NODE.GET_PARTITION_ID( net_mem IN VARCHAR2, node_id IN NUMBER ) RETURN NUMBER; Description Returns the partition ID number of the partition for a node. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. node_id Node ID number. Usage Notes This function returns a numeric partition ID value in the specified network memory object. For information about using a network memory object for editing and network analysis operations, see Section 5.7. This function is analogous to using the getPartitionID method of the Node interface of the client-side Java API (described in Section 5.10.2). Examples The following example returns the partition ID of the node whose node ID is 103 in the current network memory object. In this case, a null value is returned because the network is not partitioned. (This example is an excerpt from Example 5–5 in Section 5.11.4.) res_numeric := SDO_NET_MEM.NODE.GET_PARTITION_ID(net_mem, 103); DBMS_OUTPUT.PUT_LINE('The partition for node 103 is: ' || res_numeric); . . . The partition for node 103 is: 0 7-92 Oracle Spatial Topology and Network Data Models SDO_NET_MEM.NODE.GET_SIBLING_NODE_IDS SDO_NET_MEM.NODE.GET_SIBLING_NODE_IDS Format SDO_NET_MEM.NODE.GET_SIBLING_NODE_IDS( net_mem IN VARCHAR2, node_id IN NUMBER ) RETURN SDO_NUMBER_ARRAY; Description Returns the node ID numbers of nodes that are sibling nodes of a node. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. node_id Node ID number. Usage Notes This function returns an SDO_NUMBER_ARRAY object of node ID values in the specified network memory object. For information about using a network memory object for editing and network analysis operations, see Section 5.7. This function is analogous to using the getSiblingNodeArray method of the Node interface of the client-side Java API (described in Section 5.10.2). Sibling nodes are nodes that have the same parent node in a hierarchical network. For information about parent and child nodes and links in a network hierarchy, see Section 5.5. Examples The following example returns the sibling nodes of the node whose node ID is 103 in the current network memory object. (This example is an excerpt from Example 5–5 in Section 5.11.4.) res_array := SDO_NET_MEM.NODE.GET_SIBLING_NODE_IDS(net_mem, 103); DBMS_OUTPUT.PUT('Node 103 has the following sibling nodes: '); FOR indx IN res_array.FIRST..res_array.LAST LOOP DBMS_OUTPUT.PUT(res_array(indx) || ' '); END LOOP; DBMS_OUTPUT.PUT_LINE(' '); . . . Node 103 has the following sibling nodes: 104 105 102 106 101 SDO_NET_MEM Package Subprograms 7-93 SDO_NET_MEM.NODE.GET_STATE SDO_NET_MEM.NODE.GET_STATE Format SDO_NET_MEM.NODE.GET_STATE( net_mem IN VARCHAR2, node_id IN NUMBER ) RETURN VARCHAR2; Description Returns the state of a node. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. node_id Node ID number. Usage Notes This function returns a state name string for a node in the specified network memory object. For information about using a network memory object for editing and network analysis operations, see Section 5.7. The state is one of the following string values: ACTIVE or INACTIVE. The node state determines whether or not the node is considered by network analysis functions, such as SDO_NET_MEM.NETWORK_MANAGER.SHORTEST_PATH. If the state is ACTIVE, the node is considered by network analysis functions; if the state is INACTIVE, the node is ignored by these functions. This function is analogous to using the getState method of the Node interface of the client-side Java API (described in Section 5.10.2). To set the state of a node, use the SDO_NET_MEM.NODE.SET_STATE procedure. Examples The following example returns the state of the node whose node ID is 103 in the current network memory object. (This example is an excerpt from Example 5–5 in Section 5.11.4.) res_string := SDO_NET_MEM.NODE.GET_STATE(net_mem, 103); DBMS_OUTPUT.PUT_LINE('The state of node 103 is: ' || res_string); . . . The state of node 103 is: ACTIVE 7-94 Oracle Spatial Topology and Network Data Models SDO_NET_MEM.NODE.GET_TYPE SDO_NET_MEM.NODE.GET_TYPE Format SDO_NET_MEM.NODE.GET_TYPE( net_mem IN VARCHAR2, node_id IN NUMBER ) RETURN VARCHAR2; Description Returns the type of a node. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. node_id Node ID number. Usage Notes This function returns a type name string for a node in the specified network memory object. For information about using a network memory object for editing and network analysis operations, see Section 5.7. This function is analogous to using the getType method of the Node interface of the client-side Java API (described in Section 5.10.2). To set the type of a node, use the SDO_NET_MEM.NODE.SET_TYPE procedure. Examples The following example sets the type of the node whose node ID is 114 in the current network memory object, and then returns the type. (This example is an excerpt from Example 5–5 in Section 5.11.4.) -- SET_TYPE -- Set the type of node 114 to 'Research'. SDO_NET_MEM.NODE.SET_TYPE(net_mem, 114, 'Research'); -- GET_TYPE res_string := SDO_NET_MEM.NODE.GET_TYPE(net_mem, 114); DBMS_OUTPUT.PUT_LINE('The type of node 114 is: ' || res_string); . . . The type of node 114 is: Research SDO_NET_MEM Package Subprograms 7-95 SDO_NET_MEM.NODE.IS_ACTIVE SDO_NET_MEM.NODE.IS_ACTIVE Format SDO_NET_MEM.NODE.IS_ACTIVE( net_mem IN VARCHAR2, node_id IN NUMBER ) RETURN VARCHAR2; Description Checks if a node is active. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. node_id Node ID number. Usage Notes This function returns the string TRUE if the node in the specified network memory object is active, or FALSE if the node is not active. For information about using a network memory object for editing and network analysis operations, see Section 5.7. This function is analogous to using the isActive method of the Node interface of the client-side Java API (described in Section 5.10.2). Examples The following example checks if the node whose node ID is 103 in the current network memory object is active. (This example is an excerpt from Example 5–5 in Section 5.11.4.) res_string := SDO_NET_MEM.NODE.IS_ACTIVE(net_mem, 103); DBMS_OUTPUT.PUT_LINE('Is node 103 active?: ' || res_string); . . . Is node 103 active?: TRUE 7-96 Oracle Spatial Topology and Network Data Models SDO_NET_MEM.NODE.IS_EXTERNAL_NODE SDO_NET_MEM.NODE.IS_EXTERNAL_NODE Format SDO_NET_MEM.NODE.IS_EXTERNAL_NODE( net_mem IN VARCHAR2, node_id IN NUMBER ) RETURN VARCHAR2; Description Checks if a node is external to the network. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. node_id Node ID number. Usage Notes This function returns the string TRUE if the node in the specified network memory object is external to the network, or FALSE if the node is in the network. For information about using a network memory object for editing and network analysis operations, see Section 5.7. This function is analogous to using the isExternalNode method of the Node interface of the client-side Java API (described in Section 5.10.2). Examples The following example checks if the node whose node ID is 103 in the current network memory object is external to the network. (This example is an excerpt from Example 5–5 in Section 5.11.4.) res_string := SDO_NET_MEM.NODE.IS_EXTERNAL_NODE(net_mem, 103); DBMS_OUTPUT.PUT_LINE('Is node 103 an external node?: ' || res_string); . . . Is node 103 an external node?: FALSE SDO_NET_MEM Package Subprograms 7-97 SDO_NET_MEM.NODE.IS_LOGICAL SDO_NET_MEM.NODE.IS_LOGICAL Format SDO_NET_MEM.NODE.IS_LOGICAL( net_mem IN VARCHAR2, node_id IN NUMBER ) RETURN VARCHAR2; Description Checks if a node is in a logical network. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. node_id Node ID number. Usage Notes This function returns the string TRUE if the node in the specified network memory object is in a logical network, or FALSE if the node is not in a logical network. For information about using a network memory object for editing and network analysis operations, see Section 5.7. This function is analogous to using the isLogical method of the Node interface of the client-side Java API (described in Section 5.10.2). Examples The following example checks if the node whose node ID is 103 in the current network memory object is in a logical network. (This example is an excerpt from Example 5–5 in Section 5.11.4.) res_string := SDO_NET_MEM.NODE.IS_LOGICAL(net_mem, 103); DBMS_OUTPUT.PUT_LINE('Is node 103 a logical node?: ' || res_string); . . . Is node 103 a logical node?: TRUE 7-98 Oracle Spatial Topology and Network Data Models SDO_NET_MEM.NODE.IS_TEMPORARY SDO_NET_MEM.NODE.IS_TEMPORARY Format SDO_NET_MEM.NODE.IS_TEMPORARY( net_mem IN VARCHAR2, node_id IN NUMBER ) RETURN VARCHAR2; Description Checks if a node is temporary. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. node_id Node ID number. Usage Notes This function returns the string TRUE if the node in the specified network memory object is temporary, or FALSE if the node is not temporary. For information about using a network memory object for editing and network analysis operations, see Section 5.7. Temporary links, nodes, and paths are not saved in the database when you call the SDO_NET_MEM.NETWORK_MANAGER.WRITE_NETWORK procedure. This function is analogous to using the isTemporary method of the Node interface of the client-side Java API (described in Section 5.10.2). Examples The following example checks if the node whose node ID is 103 in the current network memory object is temporary. (This example is an excerpt from Example 5–5 in Section 5.11.4.) res_string := SDO_NET_MEM.NODE.IS_TEMPORARY(net_mem, 103); DBMS_OUTPUT.PUT_LINE('Is node 103 temporary?: ' || res_string); . . . Is node 103 temporary?: FALSE SDO_NET_MEM Package Subprograms 7-99 SDO_NET_MEM.NODE.LINK_EXISTS SDO_NET_MEM.NODE.LINK_EXISTS Format SDO_NET_MEM.NODE.LINK_EXISTS( net_mem IN VARCHAR2, node_id1 IN NUMBER, node_id2 IN NUMBER ) RETURN VARCHAR2; Description Checks if a link exists between two nodes. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. node_id1 Node ID number. node_id2 Node ID number. Usage Notes This function returns the string TRUE if a link exists between the two nodes in the specified network memory object, or FALSE if a link does not exist. For information about using a network memory object for editing and network analysis operations, see Section 5.7. This function is analogous to using the linkExists method of the Node interface of the client-side Java API (described in Section 5.10.2). Examples The following example checks if a link exists between the nodes with node ID values 103 and 104 in the current network memory object. (This example is an excerpt from Example 5–5 in Section 5.11.4.) res_string := SDO_NET_MEM.NODE.LINK_EXISTS(net_mem, 103, 104); DBMS_OUTPUT.PUT_LINE('Does a link exist between nodes 103 and 104?: ' || res_ string); . . . Does a link exist between nodes 103 and 104?: TRUE 7-100 Oracle Spatial Topology and Network Data Models SDO_NET_MEM.NODE.MAKE_TEMPORARY SDO_NET_MEM.NODE.MAKE_TEMPORARY Format SDO_NET_MEM.NODE.MAKE_TEMPORARY( net_mem IN VARCHAR2, node_id IN NUMBER); Description Makes a node temporary. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. node_id Node ID number. Usage Notes This procedure makes the node in the specified network memory object temporary. (Temporary links, nodes, and paths are not saved in the database when you call the SDO_NET_MEM.NETWORK_MANAGER.WRITE_NETWORK procedure.) For information about using a network memory object for editing and network analysis operations, see Section 5.7. This procedure is analogous to using the makeTemporary method of the Node interface of the client-side Java API (described in Section 5.10.2). To check if a node in a network memory object is temporary, use the SDO_NET_ MEM.NODE.IS_TEMPORARY function. Examples The following example makes the node whose node ID is 114 in the current network memory object a temporary node. (This example is an excerpt from Example 5–5 in Section 5.11.4.) SDO_NET_MEM.NODE.MAKE_TEMPORARY(net_mem, 114); SDO_NET_MEM Package Subprograms 7-101 SDO_NET_MEM.NODE.SET_COMPONENT_NO SDO_NET_MEM.NODE.SET_COMPONENT_NO Format SDO_NET_MEM.NODE.SET_COMPONENT_NO( net_mem IN VARCHAR2, node_id IN NUMBER, no IN NUMBER); Description Sets the component number of a node. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. node_id Node ID number. no Component number. Usage Notes This procedure sets a node component number value in the specified network memory object. For information about using a network memory object for editing and network analysis operations, see Section 5.7. All nodes in a group of connected components have the same component number. For an explanation of connected components, see the Usage Notes for the SDO_NET_ MEM.NETWORK_MANAGER.FIND_CONNECTED_COMPONENTS function. This procedure is analogous to using the setComponentNo method of the Node interface of the client-side Java API (described in Section 5.10.2). To get the node component value for a node, use the SDO_NET_MEM.NODE.GET_ COMPONENT_NO function. Examples The following example sets the component number of the node whose node ID is 114 in the current network memory object to 987. (This example is an excerpt from Example 5–5 in Section 5.11.4.) SDO_NET_MEM.NODE.SET_COMPONENT_NO(net_mem, 114, 987); 7-102 Oracle Spatial Topology and Network Data Models SDO_NET_MEM.NODE.SET_COST SDO_NET_MEM.NODE.SET_COST Format SDO_NET_MEM.NODE.SET_COST( net_mem IN VARCHAR2, node_id IN NUMBER, cost IN NUMBER); Description Sets the cost value of a node. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. node_id Node ID number. cost Cost value. Usage Notes This procedure sets a numeric node cost value in the specified network memory object. For information about using a network memory object for editing and network analysis operations, see Section 5.7. This procedure is analogous to using the setCost method of the Node interface of the client-side Java API (described in Section 5.10.2). To get the cost value for a node, use the SDO_NET_MEM.NODE.GET_COST function. Examples The following example sets the cost of the node whose node ID is 114 in the current network memory object to 40. (This example is an excerpt from Example 5–5 in Section 5.11.4.) SDO_NET_MEM.NODE.SET_COST(net_mem, 114, 40); SDO_NET_MEM Package Subprograms 7-103 SDO_NET_MEM.NODE.SET_EXTERNAL_NETWORK_ID SDO_NET_MEM.NODE.SET_EXTERNAL_NETWORK_ID Format SDO_NET_MEM.NODE.SET_EXTERNAL_NETWORK_ID( net_mem IN VARCHAR2, node_id IN NUMBER, external_network_id IN NUMBER); Description Sets the external network ID value of a node. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. node_id Node ID number. external_network_id External network ID number. Usage Notes This procedure sets a numeric external network ID value for a node in the specified network memory object. For information about using a network memory object for editing and network analysis operations, see Section 5.7. This procedure is analogous to using the setExternalNetworkID method of the Node interface of the client-side Java API (described in Section 5.10.2). To get the external network ID value for a node, use the SDO_NET_MEM.NODE.GET_ EXTERNAL_NETWORK_ID function. Examples The following example sets the external network ID of the node whose node ID is 114 in the current network memory object to 1000. (This example is an excerpt from Example 5–5 in Section 5.11.4.) SDO_NET_MEM.NODE.SET_EXTERNAL_NETWORK_ID(net_mem, 114, 1000); 7-104 Oracle Spatial Topology and Network Data Models SDO_NET_MEM.NODE.SET_EXTERNAL_NODE_ID SDO_NET_MEM.NODE.SET_EXTERNAL_NODE_ID Format SDO_NET_MEM.NODE.SET_EXTERNAL_NODE_ID( net_mem IN VARCHAR2, node_id IN NUMBER, external_node_id IN NUMBER); Description Sets the node ID value of a node external to the network. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. node_id Node ID number. external_node_id External node ID number. Usage Notes This procedure sets a numeric external node ID value for a node in the specified network memory object. For information about using a network memory object for editing and network analysis operations, see Section 5.7. This procedure is analogous to using the setExternalNodeID method of the Node interface of the client-side Java API (described in Section 5.10.2). To get the external node ID value for a node, use the SDO_NET_MEM.NODE.GET_ EXTERNAL_NODE_ID function. Examples The following example sets the external node ID of the node whose node ID is 114 in the current network memory object to 1014. (This example is an excerpt from Example 5–5 in Section 5.11.4.) SDO_NET_MEM.NODE.SET_EXTERNAL_NODE_ID(net_mem, 114, 1014); SDO_NET_MEM Package Subprograms 7-105 SDO_NET_MEM.NODE.SET_GEOM_ID SDO_NET_MEM.NODE.SET_GEOM_ID Format SDO_NET_MEM.NODE.SET_GEOM_ID( net_mem IN VARCHAR2, node_id IN NUMBER, geom_id IN NUMBER); Description Sets the geometry ID value of a node. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. node_id Node ID number. geom Geometry ID number. Usage Notes This procedure sets a numeric node geometry ID value in the specified network memory object. For information about using a network memory object for editing and network analysis operations, see Section 5.7. This procedure is analogous to using the setGeomID method of the Node interface of the client-side Java API (described in Section 5.10.2). To get the geometry ID value for a node, use the SDO_NET_MEM.NODE.GET_ GEOM_ID function. Examples The following example sets the geometry ID of the node whose node ID is 7 in the current network memory object to 99. (This example is an excerpt from Example 5–4 in Section 5.11.3.) SDO_NET_MEM.NODE.SET_GEOM_ID(net_mem, 7, 99); 7-106 Oracle Spatial Topology and Network Data Models SDO_NET_MEM.NODE.SET_GEOMETRY SDO_NET_MEM.NODE.SET_GEOMETRY Format SDO_NET_MEM.NODE.SET_GEOMETRY( net_mem IN VARCHAR2, node_id IN NUMBER, geom IN SDO_GEOMETRY); Description Sets the geometry for a node. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. node_id Node ID number. geom Spatial geometry object. Usage Notes This procedure creates an SDO_GEOMETRY object for the node in the specified network memory object. For information about using a network memory object for editing and network analysis operations, see Section 5.7. This procedure is analogous to using the setGeometry method of the Node interface of the client-side Java API (described in Section 5.10.2). To get the geometry for a node, use the SDO_NET_MEM.NODE.GET_GEOMETRY function. Examples The following example sets the geometry of the node whose node ID is 114 in the network memory object for a network named MY_NETWORK. SDO_NET_MEM.NODE.SET_GEOMETRY(’MY_NETWORK’, 114, SDO_GEOMETRY(2001, NULL, SDO_POINT_TYPE(9,4,NULL), NULL, NULL)); SDO_NET_MEM Package Subprograms 7-107 SDO_NET_MEM.NODE.SET_HIERARCHY_LEVEL SDO_NET_MEM.NODE.SET_HIERARCHY_LEVEL Format SDO_NET_MEM.NODE.SET_HIERARCHY_LEVEL( net_mem IN VARCHAR2, node_id IN NUMBER, level IN NUMBER); Description Sets the hierarchy level of a node. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. node_id Node ID number. level Hierarchy level number. Usage Notes This procedure sets a numeric hierarchy level value in the specified network memory object. For information about using a network memory object for editing and network analysis operations, see Section 5.7. This procedure is analogous to using the setHierarchyLevel method of the Node interface of the client-side Java API (described in Section 5.10.2). To get the hierarchy level of a node, use the SDO_NET_MEM.NODE.GET_ HIERARCHY_LEVEL function. For information about parent and child nodes and links in a network hierarchy, see Section 5.5. Examples The following example sets the hierarchy level whose node ID is 1 in the current network memory object to 2. SDO_NET_MEM.NODE.SET_HIERARCHY_LEVEL(net_mem, 1, 2); 7-108 Oracle Spatial Topology and Network Data Models SDO_NET_MEM.NODE.SET_MEASURE SDO_NET_MEM.NODE.SET_MEASURE Format SDO_NET_MEM.NODE.SET_MEASURE( net_mem IN VARCHAR2, node_id IN NUMBER, measure IN NUMBER); Description Sets the measure value of a node in an LRS network. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. node_id Node ID number. measure Measure value. Usage Notes This procedure sets a numeric node measure value in the specified network memory object. For information about using a network memory object for editing and network analysis operations, see Section 5.7. This procedure is analogous to using the setMeasure method of the Node interface of the client-side Java API (described in Section 5.10.2). To get the measure value of a node, use the SDO_NET_MEM.NODE.GET_MEASURE function. Examples The following example sets the measure value of the node whose node ID is 7 in the current network memory object to 30. (This example is an excerpt from Example 5–4 in Section 5.11.3.) SDO_NET_MEM.NODE.SET_MEASURE(net_mem, 7, 30); SDO_NET_MEM Package Subprograms 7-109 SDO_NET_MEM.NODE.SET_NAME SDO_NET_MEM.NODE.SET_NAME Format SDO_NET_MEM.NODE.SET_NAME( net_mem IN VARCHAR2, node_id IN NUMBER, node_name IN VARCHAR2); Description Sets the name of a node. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. node_id Node ID number. node_name Node name. Usage Notes This procedure sets a node name string value in the specified network memory object. For information about using a network memory object for editing and network analysis operations, see Section 5.7. This procedure is analogous to using the setName method of the Node interface of the client-side Java API (described in Section 5.10.2). To get the name of a node, use the SDO_NET_MEM.NODE.GET_NAME function. Examples The following example sets the name of the node whose node ID is 114 in the current network memory object to the string My favorite node. (This example is an excerpt from Example 5–5 in Section 5.11.4.) SDO_NET_MEM.NODE.SET_NAME(net_mem, 114, 'My favorite node'); 7-110 Oracle Spatial Topology and Network Data Models SDO_NET_MEM.NODE.SET_PARENT_NODE SDO_NET_MEM.NODE.SET_PARENT_NODE Format SDO_NET_MEM.NODE.SET_PARENT_NODE( net_mem IN VARCHAR2, node_id IN NUMBER, parent_node_id IN NUMBER); Description Sets the parent node of a node. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. node_id Node ID number. parent_node_id Parent node ID number. Usage Notes This procedure specifies the parent node for a node in the specified network memory object. For information about using a network memory object for editing and network analysis operations, see Section 5.7. This procedure is analogous to using the setParentNode method of the Node interface of the client-side Java API (described in Section 5.10.2). To get the ID value for a parent node, use the SDO_NET_MEM.NODE.GET_PARENT_ NODE_ID function. For information about parent and child nodes and links in a network hierarchy, see Section 5.5. Examples The following example sets the parent node of the node whose node ID is 114 in the current network memory object to the node whose node ID is 1. (This example is an excerpt from Example 5–5 in Section 5.11.4.) SDO_NET_MEM.NODE.SET_PARENT_NODE(net_mem, 114, 1); SDO_NET_MEM Package Subprograms 7-111 SDO_NET_MEM.NODE.SET_STATE SDO_NET_MEM.NODE.SET_STATE Format SDO_NET_MEM.NODE.SET_STATE( net_mem IN VARCHAR2, node_id IN NUMBER, state IN VARCHAR2); Description Sets the state of a node. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. node_id Node ID number. state Node state. Must be one of the following string values: ACTIVE or INACTIVE. Usage Notes This procedure sets a node state string value in the specified network memory object. For information about using a network memory object for editing and network analysis operations, see Section 5.7. The node state determines whether or not the node is considered by network analysis functions, such as SDO_NET_MEM.NETWORK_MANAGER.SHORTEST_PATH. If the state is ACTIVE, the node is considered by network analysis functions; if the state is INACTIVE, the node is ignored by these functions. This procedure is analogous to using the setState method of the Node interface of the client-side Java API (described in Section 5.10.2). To get the node state, use the SDO_NET_MEM.NODE.GET_STATE function. Examples The following example sets the state of the node whose node ID is 111 in the current network memory object to the string INACTIVE. (This example is an excerpt from Example 5–5 in Section 5.11.4.) SDO_NET_MEM.NODE.SET_STATE(net_mem, 111, ’INACTIVE’); 7-112 Oracle Spatial Topology and Network Data Models SDO_NET_MEM.NODE.SET_TYPE SDO_NET_MEM.NODE.SET_TYPE Format SDO_NET_MEM.NODE.SET_TYPE( net_mem IN VARCHAR2, node_id IN NUMBER, type IN VARCHAR2); Description Sets the type of a node. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. node_id Node ID number. type Node type. Usage Notes This procedure sets a node type string value in the specified network memory object. For information about using a network memory object for editing and network analysis operations, see Section 5.7. This procedure is analogous to using the setType method of the Node interface of the client-side Java API (described in Section 5.10.2). To get the type value for a node, use the SDO_NET_MEM.NODE.GET_TYPE function. Examples The following example sets the type of the node whose node ID is 114 in the current network memory object, and then returns the type. (This example is an excerpt from Example 5–5 in Section 5.11.4.) -- SET_TYPE -- Set the type of node 114 to 'Research'. SDO_NET_MEM.NODE.SET_TYPE(net_mem, 114, 'Research'); -- GET_TYPE res_string := SDO_NET_MEM.NODE.GET_TYPE(net_mem, 114); DBMS_OUTPUT.PUT_LINE('The type of node 114 is: ' || res_string); . . . The type of node 114 is: Research SDO_NET_MEM Package Subprograms 7-113 SDO_NET_MEM.PATH.COMPUTE_GEOMETRY SDO_NET_MEM.PATH.COMPUTE_GEOMETRY Format SDO_NET_MEM.PATH.COMPUTE_GEOMETRY( net_mem IN VARCHAR2, path_id IN NUMBER, tolerance IN NUMBER); Description Sets the spatial geometry for a path. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. path_id Path ID number. tolerance Tolerance value associated with geometries in the network. (Tolerance is explained in Chapter 1 of Oracle Spatial User's Guide and Reference.) This value should be consistent with the tolerance values of the geometries in the link table and node table for the network. Usage Notes This procedure computes the SDO_GEOMETRY object for the specified path in the specified network memory object. For information about using a network memory object for editing and network analysis operations, see Section 5.7. This procedure is analogous to using the computeGeometry method of the Path interface of the client-side Java API (described in Section 5.10.2). To get the computed geometry, use the SDO_NET_MEM.PATH.GET_GEOMETRY function. Examples The following example computes the spatial geometry of a path in the current network memory object, and then places the computed geometry in a variable (of type SDO_ GEOMETRY) named res_geom. -- COMPUTE_GEOMETRY SDO_NET_MEM.PATH.COMPUTE_GEOMETRY(net_mem, path_id, 0.05); -- GET_GEOMETRY res_geom := SDO_NET_MEM.PATH.GET_GEOMETRY(net_mem, path_id); 7-114 Oracle Spatial Topology and Network Data Models SDO_NET_MEM.PATH.GET_COST SDO_NET_MEM.PATH.GET_COST Format SDO_NET_MEM.PATH.GET_COST( net_mem IN VARCHAR2, path_id IN NUMBER ) RETURN NUMBER; Description Returns the cost value of a path. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. path_id Path ID number. Usage Notes This function returns a numeric cost value for a path in the specified network memory object. For information about using a network memory object for editing and network analysis operations, see Section 5.7. This function is analogous to using the getCost method of the Path interface of the client-side Java API (described in Section 5.10.2). Examples The following example returns the cost of a path in the current network memory object. res_numeric := SDO_NET_MEM.PATH.GET_COST(net_mem, path_id); DBMS_OUTPUT.PUT_LINE('The cost of path ' || path_id || ' is: ' || res_numeric); . . . The cost of path 21 is: 50 SDO_NET_MEM Package Subprograms 7-115 SDO_NET_MEM.PATH.GET_END_NODE_ID SDO_NET_MEM.PATH.GET_END_NODE_ID Format SDO_NET_MEM.PATH.GET_END_NODE_ID( net_mem IN VARCHAR2, path_id IN NUMBER ) RETURN NUMBER; Description Returns the node ID value of the end node of a path. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. path_id Path ID number. Usage Notes This function returns a numeric end node ID value for a path in the specified network memory object. For information about using a network memory object for editing and network analysis operations, see Section 5.7. This function is analogous to using the getEndNodeID method of the Path interface of the client-side Java API (described in Section 5.10.2). Examples The following example returns the node ID of the end node of a path in the current network memory object. res_numeric := SDO_NET_MEM.PATH.GET_END_NODE_ID(net_mem, path_id); DBMS_OUTPUT.PUT_LINE('The end node ID of path ' || path_id || ' is: ' || res_ numeric); . . . The end node ID of path 21 is: 105 7-116 Oracle Spatial Topology and Network Data Models SDO_NET_MEM.PATH.GET_GEOMETRY SDO_NET_MEM.PATH.GET_GEOMETRY Format SDO_NET_MEM.PATH.GET_GEOMETRY( net_mem IN VARCHAR2, path_id IN NUMBER ) RETURN SDO_GEOMETRY; Description Returns the spatial geometry of a path. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. path_id Path ID number. Usage Notes This function returns an SDO_GEOMETRY object for a path in the specified network memory object. For information about using a network memory object for editing and network analysis operations, see Section 5.7. This function is analogous to using the getPath method of the Path interface of the client-side Java API (described in Section 5.10.2). To set the geometry ID value for a path, use the SDO_NET_MEM.PATH.SET_ GEOMETRY procedure. Examples The following example returns the spatial geometry of a path in the current network memory object. res_geom := SDO_NET_MEM.PATH.GET_GEOMETRY(net_mem, path_id); SDO_NET_MEM Package Subprograms 7-117 SDO_NET_MEM.PATH.GET_LINK_IDS SDO_NET_MEM.PATH.GET_LINK_IDS Format SDO_NET_MEM.PATH.GET_LINK_IDS( net_mem IN VARCHAR2, path_id IN NUMBER ) RETURN SDO_NUMBER_ARRAY; Description Returns an array of link ID values of the links in a path. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. path_id Path ID number. Usage Notes This function returns an SDO_NUMBER_ARRAY object with link ID values for links in a path in the specified network memory object. For information about using a network memory object for editing and network analysis operations, see Section 5.7. This function is analogous to using the getLinks method of the Path interface of the client-side Java API (described in Section 5.10.2). Examples The following example returns the links in a path in the current network memory object. res_array := SDO_NET_MEM.PATH.GET_LINK_IDS(net_mem, path_id); DBMS_OUTPUT.PUT_LINE('Path ' || path_id || ' has the following links: '); FOR indx IN res_array.FIRST..res_array.LAST LOOP DBMS_OUTPUT.PUT(res_array(indx) || ' '); END LOOP; . . . Path 21 has the following links: 1102 1104 1105 7-118 Oracle Spatial Topology and Network Data Models SDO_NET_MEM.PATH.GET_NAME SDO_NET_MEM.PATH.GET_NAME Format SDO_NET_MEM.PATH.GET_NAME( net_mem IN VARCHAR2, path_id IN NUMBER ) RETURN VARCHAR2; Description Returns the name of a path. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. path_id Path ID number. Usage Notes This function returns a path name string for a path in the specified network memory object. For information about using a network memory object for editing and network analysis operations, see Section 5.7. This function is analogous to using the getName method of the Path interface of the client-side Java API (described in Section 5.10.2). To set the name for a path, use the SDO_NET_MEM.PATH.SET_NAME procedure. Examples The following example sets the name of a path in the current network memory object to the string My favorite path, and then returns the name. -- SET_NAME -- Set the name of path to 'My favorite path'. SDO_NET_MEM.PATH.SET_NAME(net_mem, path_id, 'My favorite path'); -- GET_NAME res_string := SDO_NET_MEM.PATH.GET_NAME(net_mem, path_id); DBMS_OUTPUT.PUT_LINE('The name of path ' || path_id || ' is: ' || res_string); . . . The name of path 21 is: My favorite path SDO_NET_MEM Package Subprograms 7-119 SDO_NET_MEM.PATH.GET_NO_OF_LINKS SDO_NET_MEM.PATH.GET_NO_OF_LINKS Format SDO_NET_MEM.PATH.GET_NO_OF_LINKS( net_mem IN VARCHAR2, path_id IN NUMBER ) RETURN NUMBER; Description Returns the number of links in a path. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. path_id Path ID number. Usage Notes This function returns the number of links in a path in the specified network memory object. For information about using a network memory object for editing and network analysis operations, see Section 5.7. This function is analogous to using the getNoOfLinks method of the Path interface of the client-side Java API (described in Section 5.10.2). Examples The following example returns the number of links in a path in the current network memory object. res_numeric := SDO_NET_MEM.PATH.GET_NO_OF_LINKS(net_mem, path_id); DBMS_OUTPUT.PUT_LINE('The number of links in path ' || path_id || ' is: ' || res_ numeric); . . . The number of links in path 21 is: 3 7-120 Oracle Spatial Topology and Network Data Models SDO_NET_MEM.PATH.GET_NODE_IDS SDO_NET_MEM.PATH.GET_NODE_IDS Format SDO_NET_MEM.PATH.GET_NODE_IDS( net_mem IN VARCHAR2, path_id IN NUMBER ) RETURN SDO_NUMBER_ARRAY; Description Returns an array of node ID values of the nodes in a path. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. path_id Path ID number. Usage Notes This function returns an SDO_NUMBER_ARRAY object with node ID values for nodes in a path in the specified network memory object. For information about using a network memory object for editing and network analysis operations, see Section 5.7. This function is analogous to using the getNodes method of the Path interface of the client-side Java API (described in Section 5.10.2). Examples The following example returns the node IDs of the nodes in a path in the current network memory object. res_array := SDO_NET_MEM.PATH.GET_NODE_IDS(net_mem, path_id); DBMS_OUTPUT.PUT('Path ' || path_id || ' has the following nodes: '); FOR indx IN res_array.FIRST..res_array.LAST LOOP DBMS_OUTPUT.PUT(res_array(indx) || ' '); END LOOP; DBMS_OUTPUT.PUT_LINE(' '); . . . Path 21 has the following nodes: 101 103 104 105 SDO_NET_MEM Package Subprograms 7-121 SDO_NET_MEM.PATH.GET_START_NODE_ID SDO_NET_MEM.PATH.GET_START_NODE_ID Format SDO_NET_MEM.PATH.GET_START_NODE_ID( net_mem IN VARCHAR2, path_id IN NUMBER ) RETURN NUMBER; Description Returns the node ID value of the start node of a path. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. path_id Path ID number. Usage Notes This function returns a numeric start node ID value for a path in the specified network memory object. For information about using a network memory object for editing and network analysis operations, see Section 5.7. This function is analogous to using the getStartNode method of the Path interface of the client-side Java API (described in Section 5.10.2). Examples The following example returns the start node ID of a path in the current network memory object. res_numeric := SDO_NET_MEM.PATH.GET_START_NODE_ID(net_mem, path_id); DBMS_OUTPUT.PUT_LINE('The start node ID of path ' || path_id || ' is: ' || res_ numeric); . . . The start node ID of path 21 is: 101 7-122 Oracle Spatial Topology and Network Data Models SDO_NET_MEM.PATH.GET_TYPE SDO_NET_MEM.PATH.GET_TYPE Format SDO_NET_MEM.PATH.GET_TYPE( net_mem IN VARCHAR2, path_id IN NUMBER ) RETURN VARCHAR2; Description Returns the type of a path. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. path_id Path ID number. Usage Notes This function returns a type name string for a path in the specified network memory object. For information about using a network memory object for editing and network analysis operations, see Section 5.7. This function is analogous to using the getType method of the Path interface of the client-side Java API (described in Section 5.10.2). To set the type for a path, use the SDO_NET_MEM.PATH.SET_TYPE procedure. Examples The following example sets the type of a path in the current network memory object to the string Logical connections, and then returns the type. -- SET_TYPE -- Set the type of the path to 'Logical connections'. SDO_NET_MEM.PATH.SET_TYPE(net_mem, path_id, 'Logical connections'); -- GET_TYPE res_string := SDO_NET_MEM.PATH.GET_TYPE(net_mem, path_id); DBMS_OUTPUT.PUT_LINE('The type of path ' || path_id || ' is: ' || res_string); . . . The type of path 21 is: Logical connections SDO_NET_MEM Package Subprograms 7-123 SDO_NET_MEM.PATH.IS_ACTIVE SDO_NET_MEM.PATH.IS_ACTIVE Format SDO_NET_MEM.PATH.IS_ACTIVE( net_mem IN VARCHAR2, path_id IN NUMBER ) RETURN VARCHAR2; Description Checks if a path is active. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. path_id Path ID number. Usage Notes This function returns the string TRUE if the path in the specified network memory object is active, or FALSE if the path is not active. For information about using a network memory object for editing and network analysis operations, see Section 5.7. This function is analogous to using the isActive method of the Path interface of the client-side Java API (described in Section 5.10.2). Examples The following example checks if a path in the current network memory object is active. res_string := SDO_NET_MEM.PATH.IS_ACTIVE(net_mem, path_id); DBMS_OUTPUT.PUT_LINE('Is path ' || path_id || ' active?: ' || res_string); . . . Is path 21 active?: TRUE 7-124 Oracle Spatial Topology and Network Data Models SDO_NET_MEM.PATH.IS_CLOSED SDO_NET_MEM.PATH.IS_CLOSED Format SDO_NET_MEM.PATH.IS_CLOSED( net_mem IN VARCHAR2, path_id IN NUMBER ) RETURN VARCHAR2; Description Checks if a path is closed. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. path_id Path ID number. Usage Notes This function returns the string TRUE if the path in the specified network memory object is closed, or FALSE if the path is not closed. For information about using a network memory object for editing and network analysis operations, see Section 5.7. This function is analogous to using the isClosed method of the Path interface of the client-side Java API (described in Section 5.10.2). Examples The following example checks if a path in the current network memory object is closed. res_string := SDO_NET_MEM.PATH.IS_CLOSED(net_mem, path_id); DBMS_OUTPUT.PUT_LINE('Is path ' || path_id || ' closed?: ' || res_string); . . . Is path 21 closed?: FALSE SDO_NET_MEM Package Subprograms 7-125 SDO_NET_MEM.PATH.IS_CONNECTED SDO_NET_MEM.PATH.IS_CONNECTED Format SDO_NET_MEM.PATH.IS_CONNECTED( net_mem IN VARCHAR2, path_id IN NUMBER ) RETURN VARCHAR2; Description Checks if a path is connected. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. path_id Path ID number. Usage Notes This function returns the string TRUE if the path in the specified network memory object is connected, or FALSE if the path is not connected. For information about using a network memory object for editing and network analysis operations, see Section 5.7. This function is analogous to using the isConnected method of the Path interface of the client-side Java API (described in Section 5.10.2). Examples The following example checks if a path in the current network memory object is connected. res_string := SDO_NET_MEM.PATH.IS_CONNECTED(net_mem, path_id); DBMS_OUTPUT.PUT_LINE('Is path ' || path_id || ' connected?: ' || res_string); . . . Is path 21 connected?: FALSE 7-126 Oracle Spatial Topology and Network Data Models SDO_NET_MEM.PATH.IS_LOGICAL SDO_NET_MEM.PATH.IS_LOGICAL Format SDO_NET_MEM.PATH.IS_LOGICAL( net_mem IN VARCHAR2, path_id IN NUMBER ) RETURN VARCHAR2; Description Checks if a path is in a logical network. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. path_id Path ID number. Usage Notes This function returns the string TRUE if the path in the specified network memory object is in a logical network, or FALSE if the path is not in a logical network. For information about using a network memory object for editing and network analysis operations, see Section 5.7. This function is analogous to using the isLogical method of the Path interface of the client-side Java API (described in Section 5.10.2). Examples The following example checks if a path in the current network memory object is a logical path. res_string := SDO_NET_MEM.PATH.IS_LOGICAL(net_mem, path_id); DBMS_OUTPUT.PUT_LINE('Is path ' || path_id || ' a logical path?: ' || res_string); . . . Is path 21 a logical path?: TRUE SDO_NET_MEM Package Subprograms 7-127 SDO_NET_MEM.PATH.IS_SIMPLE SDO_NET_MEM.PATH.IS_SIMPLE Format SDO_NET_MEM.PATH.IS_SIMPLE( net_mem IN VARCHAR2, path_id IN NUMBER ) RETURN VARCHAR2; Description Checks if a path is simple. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. path_id Path ID number. Usage Notes This function returns the string TRUE if the path in the specified network memory object is simple, or FALSE if the path is not simple (that is, is a complex path). In a simple path, the links form an ordered list that can be traversed from the start node to the end node with each link visited once. In a complex path, there are multiple options for going from the start node to the end node. For information about using a network memory object for editing and network analysis operations, see Section 5.7. This function is analogous to using the isSimple method of the Path interface of the client-side Java API (described in Section 5.10.2). Examples The following example checks if a path in the current network memory object is a simple path. res_string := SDO_NET_MEM.PATH.IS_SIMPLE(net_mem, path_id); DBMS_OUTPUT.PUT_LINE('Is path ' || path_id || ' a simple path?: ' || res_string); . . . Is path 21 a simple path?: TRUE 7-128 Oracle Spatial Topology and Network Data Models SDO_NET_MEM.PATH.IS_TEMPORARY SDO_NET_MEM.PATH.IS_TEMPORARY Format SDO_NET_MEM.PATH.IS_TEMPORARY( net_mem IN VARCHAR2, path_id IN NUMBER ) RETURN VARCHAR2; Description Checks if a path is temporary. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. path_id Path ID number. Usage Notes This function returns the string TRUE if the path in the specified network memory object is temporary, or FALSE if the path is not temporary. For information about using a network memory object for editing and network analysis operations, see Section 5.7. Temporary links, nodes, and paths are not saved in the database when you call the SDO_NET_MEM.NETWORK_MANAGER.WRITE_NETWORK procedure. This function is analogous to using the isTemporary method of the Path interface of the client-side Java API (described in Section 5.10.2). Examples The following example checks if a path in the current network memory object is temporary. res_string := SDO_NET_MEM.PATH.IS_TEMPORARY(net_mem, path_id); DBMS_OUTPUT.PUT_LINE('Is path ' || path_id || ' temporary?: ' || res_string); . . . Is path 21 temporary?: FALSE SDO_NET_MEM Package Subprograms 7-129 SDO_NET_MEM.PATH.SET_GEOMETRY SDO_NET_MEM.PATH.SET_GEOMETRY Format SDO_NET_MEM.PATH.SET_GEOMETRY( net_mem IN VARCHAR2, path_id IN NUMBER, geom IN SDO_GEOMETRY); Description Sets the spatial geometry for a path. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. path_id Path ID number. geom Spatial geometry object. Usage Notes This procedure creates an SDO_GEOMETRY object for the node in the specified network memory object. For information about using a network memory object for editing and network analysis operations, see Section 5.7. This procedure is analogous to using the setGeometry method of the Path interface of the client-side Java API (described in Section 5.10.2). To get the geometry for a path, use the SDO_NET_MEM.PATH.GET_GEOMETRY function. Examples The following example sets the spatial geometry of a path in the current network memory object. SDO_NET_MEM.PATH.SET_GEOMETRY(net_mem, path_id, SDO_GEOMETRY( 2002, NULL, NULL, SDO_ELEM_INFO_ARRAY(1,2,1), SDO_ORDINATE_ARRAY(2,2, 2,4, 8,4, 12,4, 12,10, 8,10, 5,14))); 7-130 Oracle Spatial Topology and Network Data Models SDO_NET_MEM.PATH.SET_NAME SDO_NET_MEM.PATH.SET_NAME Format SDO_NET_MEM.PATH.SET_NAME( net_mem IN VARCHAR2, path_id IN NUMBER, path_name IN VARCHAR2); Description Sets the name of a path. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. path_id Path ID number. path_name Path name. Usage Notes This procedure sets a path name string value in the specified network memory object. For information about using a network memory object for editing and network analysis operations, see Section 5.7. This procedure is analogous to using the setName method of the Path interface of the client-side Java API (described in Section 5.10.2). To get the name of a path, use the SDO_NET_MEM.PATH.GET_NAME function. Examples The following example sets the name of a path in the current network memory object to the string My favorite path, and then returns the name. -- SET_NAME -- Set the name of path to 'My favorite path'. SDO_NET_MEM.PATH.SET_NAME(net_mem, path_id, 'My favorite path'); -- GET_NAME res_string := SDO_NET_MEM.PATH.GET_NAME(net_mem, path_id); DBMS_OUTPUT.PUT_LINE('The name of path ' || path_id || ' is: ' || res_string); . . . The name of path 21 is: My favorite path SDO_NET_MEM Package Subprograms 7-131 SDO_NET_MEM.PATH.SET_PATH_ID SDO_NET_MEM.PATH.SET_PATH_ID Format SDO_NET_MEM.PATH.SET_PATH_ID( net_mem IN VARCHAR2, path_id IN NUMBER, new_path_id IN NUMBER); Description Sets the path ID value of a path. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. path_id Path ID number. new_path_id New path ID number. Usage Notes This procedure sets a numeric path ID value in the specified network memory object. For information about using a network memory object for editing and network analysis operations, see Section 5.7. This procedure is analogous to using the setPathID method of the Path interface of the client-side Java API (described in Section 5.10.2). Examples The following example sets the path ID of a path in the current network memory object to 6789. SDO_NET_MEM.PATH.SET_PATH_ID(net_mem, path_id, 6789); 7-132 Oracle Spatial Topology and Network Data Models SDO_NET_MEM.PATH.SET_TYPE SDO_NET_MEM.PATH.SET_TYPE Format SDO_NET_MEM.PATH.SET_TYPE( net_mem IN VARCHAR2, path_id IN NUMBER, type IN VARCHAR2); Description Sets the type of a path. Parameters net_mem Name of the network whose current network memory object (created using the SDO_ NET_MEM.NETWORK_MANAGER.READ_NETWORK procedure) is to be used. path_id Path ID number. type Path type. Usage Notes This procedure sets a path type string value in the specified network memory object. For information about using a network memory object for editing and network analysis operations, see Section 5.7. This procedure is analogous to using the setType method of the Path interface of the client-side Java API (described in Section 5.10.2). To get the type value for a path, use the SDO_NET_MEM.PATH.GET_TYPE function. Examples The following example sets the path type of a path in the current network memory object to the string Scenic. SDO_NET_MEM.PATH.SET_TYPE(net_mem, path_id, 'Scenic'); SDO_NET_MEM Package Subprograms 7-133 SDO_NET_MEM.PATH.SET_TYPE 7-134 Oracle Spatial Topology and Network Data Models Index A C A* search algorithm for shortest path, 7-66 active link checking for, 7-19 active links, 5-6 ACTIVE column in link table, 5-12 active nodes, 5-6 ACTIVE column in node table, 5-11 checking for, 7-96 active paths checking for, 7-124 ADD_EDGE function, 4-2 ADD_ISOLATED_NODE function, 4-4 ADD_LINEAR_GEOMETRY function, 4-6 ADD_LINK procedure, 7-34 ADD_LOOP function, 4-8 ADD_LRS_NODE procedure, 7-36 ADD_NODE function, 4-10 ADD_NODE procedure, 7-38 ADD_PATH procedure, 7-39 ADD_POINT_GEOMETRY function, 4-12 ADD_POLYGON_GEOMETRY function, 4-14 ADD_SDO_NODE procedure, 7-40 ADD_TOPO_GEOMETRY_LAYER procedure, 3-2 adjacent nodes getting, 7-76 ALL_PATHS procedure, 7-45 ALL_SDO_NETWORK_CONSTRAINTS view, 5-16 ALL_SDO_NETWORK_METADATA view, 5-14 ALL_SDO_TOPO_INFO view, 1-26 ALL_SDO_TOPO_METADATA view, 1-27 API network data model, 5-16 performance, 5-16 topology data model, 1-29 application programming interface (API) network data model, 5-16 performance, 5-16 topology data model, 1-29 cache TopoMap object associated with, 2-2 See also TopoMap objects CHANGE_EDGE_COORDS procedure, 4-16 checking if active, 7-19 child layer, 1-10 child links getting, 7-4 child node, 5-7 child nodes getting, 7-77 CLEAR_TOPO_MAP procedure, 4-18 closed path definition, 7-70 specifying for TSP, 7-70 closed paths checking for, 7-125 co-links, 7-5 collection layers, 1-8 COMMIT_TOPO_MAP procedure, 4-19 complex path, 5-13 checking, 7-128 component number getting for a node, 7-78 setting for a node, 7-102 COMPUTE_GEOMETRY procedure, 7-114 connected components, 7-57 connected paths checking for, 7-126 constraints network, 5-8 containing face getting for point, 4-29 COPY_NETWORK procedure, 6-2 cost, 5-5 getting for a link, 7-6 getting for a node, 7-79 getting for a path, 7-115 LINK_COST_COLUMN column in network metadata views, 5-15 NODE_COST_COLUMN column in network metadata views, 5-15 setting for a link, 7-23 setting for a node, 7-103 B bidirected links, 5-5 Index-1 CREATE_EDGE_INDEX procedure, 4-20 CREATE_FACE_INDEX procedure, 4-21 CREATE_FEATURE function, 4-22 CREATE_LINK_TABLE procedure, 6-3 CREATE_LOGICAL_NETWORK procedure, 6-4, 7-47 CREATE_LRS_NETWORK procedure, 6-6, 7-49 CREATE_LRS_TABLE procedure, 6-9 CREATE_NODE_TABLE procedure, 6-10 CREATE_PATH_LINK_TABLE procedure, 6-11 CREATE_PATH_TABLE procedure, 6-12 CREATE_REF_CONSTRAINTS procedure, 7-51 CREATE_SDO_NETWORK procedure, 6-13, 7-52 CREATE_TOPO_MAP procedure, 4-26 CREATE_TOPO_NETWORK procedure, 6-16 CREATE_TOPOLOGY procedure, 3-4 cross-schema considerations topology editing, 1-34 topology usage, 1-33 D degree of a node, 5-6 DELETE_LINK procedure, 7-42 DELETE_NODE procedure, 7-43 DELETE_PATH procedure, 7-44 DELETE_TOPO_GEOMETRY_LAYER procedure, 3-6 demo files network data model, 5-61 Dijkstra search algorithm for shortest path, 7-68 directed networks, 5-5 direction of edge, 1-4 DISABLE_REF_CONSTRAINTS procedure, 7-54 DROP_NETWORK procedure, 6-19, 7-55 DROP_TOPO_MAP procedure, 4-28 DROP_TOPOLOGY procedure, 3-7 duration, 5-6 LINK_DURATION_COLUMN column in network metadata views, 5-15 NODE_DURATION_COLUMN column in network metadata views, 5-15 E edge index creating for TopoMap object, 4-20 edge information table, 1-14 edge sequences privileges needed for cross-schema topology editing, 1-34 edges adding, 2-15, 4-2 adding linear geometry, 4-6 adding loop, 4-8 changing coordinates, 2-18, 4-16 definition, 1-4 direction, 1-4 finding edges interacting with a query Index-2 window, 4-72 getting coordinates of shape points, 4-33 getting ID numbers of added edges, 4-31 getting ID numbers of changed edges, 4-32 getting ID numbers of deleted edges, 4-34 getting nearest edge for point, 4-40 getting nearest edge in cache for point, 4-42 getting nodes on, 4-35 island, 1-5 isolated, 1-5 loop, 1-5 moving, 2-16, 4-61 removing, 2-17, 4-68 storing information in edge information table, 1-14 updating, 2-18 ENABLE_REF_CONSTRAINTS procedure, 7-56 end measure getting, 7-7 end node getting for a link, 7-8 getting for a path, 7-116 setting for a link, 7-24 error handling topology editing, 2-7 examples network data model (PL/SQL), 5-26 network data model demo files, 5-61 topology data model (PL/SQL), 1-34 exception handling topology editing, 2-7 external link checking for, 7-20 external networks getting ID for a node, 7-80 getting name for a node, 7-81 getting node ID, 7-82 setting ID, 7-104 external node IS_EXTERNAL_NODE function, 7-97 external node ID setting, 7-105 F F0 (face zero, or universe face), 1-5 face index creating for TopoMap object, 4-21 face information table, 1-16 face sequences privileges needed for cross-schema topology editing, 1-34 faces adding polygon geometry, 4-14 definition, 1-4 finding faces interacting with a query window, 4-74 getting boundary, 4-38 getting boundary of, 3-8 getting containing face for point, 4-29 getting ID numbers of added faces, 4-36 getting ID numbers of changed faces, 4-37 getting ID numbers of deleted faces, 4-39 redefining, 2-18 storing information in face information table, 1-16 feature table, 1-7 features creating from geometries, 4-22 in network application, 5-5 FIND_CONNECTED_COMPONENTS function, 7-57 FIND_REACHABLE_NODES function, 7-58 FIND_REACHING_NODES function, 7-59 function-based indexes not supported on SDO_TOPO_GEOMETRY columns, 1-34 G geometry computing for a path, 7-114 getting for a link, 7-10 getting for a path, 7-117 setting for a link, 7-26 setting for a node, 7-107 setting for a path, 7-130 geometry ID getting for a link, 7-9 getting for a node, 7-84 getting for node, 7-83 setting for a link, 7-25 setting for a node, 7-106 GET_ADJACENT_NODE_IDS function, 7-76 GET_CHILD_LINKS function, 6-20, 7-4 GET_CHILD_NODE_IDS function, 7-77 GET_CHILD_NODES function, 6-21 GET_CO_LINK_IDS function, 7-5 GET_COMPONENT_NO function, 7-78 GET_CONTAINING_FACE function, 4-29 GET_COST function, 7-6, 7-79, 7-115 GET_EDGE_ADDITIONS function, 4-31 GET_EDGE_CHANGES function, 4-32 GET_EDGE_COORDS function, 4-33 GET_EDGE_DELETIONS function, 4-34 GET_EDGE_NODES function, 4-35 GET_END_MEASURE function, 7-7 GET_END_NODE_ID function, 7-8, 7-116 GET_EXTERNAL_NETWORK_ID function, 7-80 GET_EXTERNAL_NETWORK_NAME function, 7-81 GET_EXTERNAL_NODE_ID function, 7-82 GET_FACE_ADDITIONS function, 4-36 GET_FACE_BOUNDARY function, 3-8, 4-38 GET_FACE_CHANGES function, 4-37 GET_FACE_DELETIONS function, 4-39 GET_GEOM_ID function, 7-9, 7-83 GET_GEOMETRY function, 7-10, 7-84, 7-117 GET_GEOMETRY member function, 1-24 GET_GEOMETRY_TYPE function, 6-22 GET_HIERARCHY_LEVEL function, 7-85 GET_IN_LINK_IDS function, 7-86 GET_IN_LINKS function, 6-23 GET_INCIDENT_LINK_IDS function, 7-87 GET_LEVEL function, 7-11 GET_LINK_COST_COLUMN function, 6-24 GET_LINK_DIRECTION function, 6-25 GET_LINK_GEOM_COLUMN function, 6-26 GET_LINK_GEOMETRY function, 6-27 GET_LINK_IDS function, 7-118 GET_LINK_TABLE_NAME function, 6-28 GET_LRS_GEOM_COLUMN function, 6-29 GET_LRS_LINK_GEOMETRY function, 6-30 GET_LRS_NODE_GEOMETRY function, 6-31 GET_LRS_TABLE_NAME function, 6-32 GET_MEASURE function, 7-88 GET_NAME function, 7-12, 7-89, 7-119 GET_NEAREST_EDGE function, 4-40 GET_NEAREST_EDGE_IN_CACHE function, 4-42 GET_NEAREST_NODE function, 4-44 GET_NEAREST_NODE_IN_CACHE function, 4-46 GET_NETWORK_TYPE function, 6-33 GET_NO_OF_HIERARCHY_LEVELS function, 6-34 GET_NO_OF_LINKS function, 6-35, 7-120 GET_NO_OF_NODES function, 6-36 GET_NODE_ADDITIONS function, 4-48 GET_NODE_CHANGES function, 4-49 GET_NODE_COORD function, 4-50 GET_NODE_DEGREE function, 6-37 GET_NODE_DELETIONS function, 4-51 GET_NODE_FACE_STAR function, 4-52 GET_NODE_GEOM_COLUMN function, 6-38 GET_NODE_GEOMETRY function, 6-39 GET_NODE_IDS function, 7-121 GET_NODE_IN_DEGREE function, 6-40 GET_NODE_OUT_DEGREE function, 6-41 GET_NODE_STAR function, 4-53 GET_NODE_TABLE_NAME function, 6-42 GET_OUT_LINK_IDS function, 7-90 GET_OUT_LINKS function, 6-43 GET_PARENT_LINK_ID function, 7-13 GET_PARENT_NODE_ID function, 7-91 GET_PARTITION_ID function, 7-92 GET_PATH_GEOM_COLUMN function, 6-44 GET_PATH_TABLE_NAME function, 6-45 GET_SIBLING_LINK_IDS function, 7-14 GET_SIBLING_NODE_IDS function, 7-93 GET_START_MEASURE function, 7-15 GET_START_NODE_ID function, 7-16, 7-122 GET_STATE function, 7-17, 7-94 GET_TGL_OBJECTS member function, 1-25 GET_TOPO_ELEMENTS member function, 1-25 GET_TOPO_NAME function, 4-54 GET_TOPO_OBJECTS function, 3-9 GET_TOPO_TRANSACTION_ID function, 4-55 GET_TYPE function, 7-18, 7-95, 7-123 getting link IDs, 7-118 Index-3 H heap size Java, 4-76, 7-3 hierarchy network, 5-7 topology geometry layer, 1-9 hierarchy level getting for a node, 7-85 setting for a node, 7-108 history information table, 1-17 I inbound links, 5-6 getting for a node, 7-86 getting link ID numbers, 6-23 getting number of for node, 6-40 incident links getting for a node, 7-87 in-degree, 5-6 INITIALIZE_AFTER_IMPORT procedure, 3-11 INITIALIZE_METADATA procedure, 3-12 IS_ACTIVE function, 7-19, 7-96, 7-124 IS_CLOSED function, 7-125 IS_CONNECTED function, 7-126 IS_EXTERNAL_LINK function, 7-20 IS_EXTERNAL_NODE function, 7-97 IS_HIERARCHICAL function, 6-46 IS_LOGICAL function, 6-47, 7-21, 7-98, 7-127 IS_REACHABLE function, 7-60 IS_SIMPLE function, 7-128 IS_SPATIAL function, 6-48 IS_TEMPORARY function, 7-22, 7-99, 7-129 island edge See isolated edge island node See isolated node isolated edge, 1-5 isolated node, 1-5 adding, 4-4 J Java client interface for network data model (sdonm), 5-19 Java client interface for topology data model (sdotopo), 1-32 Java maximum heap size setting, 4-76, 7-3 K Kruskal algorithm, 7-62 L layer collection, 1-8 topology geometry, 1-7, 3-2 linear geometries Index-4 adding, 4-6 link direction getting, 6-25 link geometry getting, 6-27 link level getting, 7-11 link name getting, 7-12 setting, 7-29 link table definition, 5-12 LINK_EXISTS function, 7-100 links, 7-19 adding, 7-34 bidirected, 5-5 checking if exists, 7-100 checking if external, 7-20 checking if temporary, 7-22 child links, 7-4 co-links, 7-5 definition, 5-5 deleting, 7-42 determining if directed, 6-25 direction, 5-5 getting geometry for, 6-27 getting name, 7-12 getting parent link, 7-13 getting sibling links, 7-14 relationship to paths, 5-5 setting cost, 7-23 setting end node, 7-24 setting geometry, 7-26 setting geometry ID, 7-25 setting hierarchy level, 7-27 setting measure values, 7-28 setting name, 7-29 setting parent link, 7-30 setting start node, 7-31 setting state, 7-32 setting type, 7-33 state of, 5-6 temporary, 5-6 unidirected, 5-5 See also bidirected links, inbound links, outbound links LIST_NETWORKS function, 7-61 LIST_TOPO_MAPS function, 4-56 LOAD_TOPO_MAP function or procedure, 4-57 logical network, 5-5 creating, 7-47 SDO_NET_MEM.LINK.IS_LOGICAL function, 7-21 SDO_NET_MEM.NODE.IS_LOGICAL function, 7-98 SDO_NET_MEM.PATH.IS_LOGICAL function, 7-127 loop edge, 1-5 loops adding, 4-8 LRS network, 5-5 creating, 7-49 LRS nodes adding, 7-36 LRS_GEOMETRY_NETWORK function, 6-49 M MAKE_TEMPORARY procedure, 7-101 MCST_LINK function, 7-62 measure value getting for a node, 7-88 setting for a node, 7-109 measure values setting for a link, 7-28 metadata initializing for a topology, 3-12 minimum cost path, 5-5 minimum cost spanning tree, 5-6 definition, 7-62 minimum cost spanning tree (MCST) finding, 7-62 MOVE_EDGE procedure, 4-61 MOVE_ISOLATED_NODE procedure, 4-64 MOVE_NODE procedure, 4-66 N naming considerations Spatial table and column names, 1-13, 5-11 nearest edge getting for point, 4-40 getting in cache for point, 4-42 nearest node getting for point, 4-44 getting in cache for point, 4-46 NEAREST_NEIGHBORS function, 7-63 network analysis using a network memory object for, 5-9 network constraints, 5-8 ALL_SDO_NETWORK_CONSTRAINTS view, 5-16 USER_SDO_NETWORK_CONSTRAINTS view, 5-16 network data model application programming interface (API), 5-16 performance, 5-16 concepts, 5-5 overview, 5-1 PL/SQL examples, 5-26 steps for using, 5-3 subprogram reference information, 6-1, 7-1 tables for, 5-10 network editing using a network memory object for, 5-9 Network Editor demo files, 5-61 interface illustration, 5-2 network memory object creating, 7-65 using for editing and analysis, 5-9 network schema validating, 7-72 NETWORK_EXISTS function, 6-50 networks analyzing, 5-9 definition, 5-5 directed, 5-5 dropping, 7-55 editing, 5-9 hierarchical, 5-7 logical, 5-5 spatial, 5-5 undirected, 5-5 writing, 7-75 node getting inbound links, 7-86 node face star getting for node, 4-52 node geometry getting, 6-39 node information table, 1-15 node name getting, 7-89 setting, 7-110 node sequences privileges needed for cross-schema topology editing, 1-34 node star getting for node, 4-53 node table definition, 5-11 nodes adding, 2-8, 4-4, 4-10, 7-38 adding LRS node, 7-36 adding point geometry, 4-12 adding SDO node, 7-40 checking if active, 7-96 checking if external, 7-97 checking if temporary, 7-99 definition, 1-4, 5-5 degree, 5-6 deleting, 7-43 getting adjacent nodes, 7-76 getting child nodes, 7-77 getting component number, 7-78 getting coordinates of, 4-50 getting cost, 7-79 getting geometry, 6-39, 7-84 getting geometry ID, 7-83 getting hierarchy level, 7-85 getting ID numbers of added nodes, 4-48 getting ID numbers of changed nodes, 4-49 getting ID numbers of deleted nodes, 4-51 getting incident links, 7-87 getting measure value, 7-88 getting name, 7-89 getting nearest node for point, 4-44 getting nearest node in cache for point, 4-46 getting node face star, 4-52 Index-5 getting node star, 4-53 getting number of, 6-36 getting outbound links, 7-90 getting parent node, 7-91 getting partition ID, 7-92 getting sibling nodes, 7-93 getting state, 7-94 getting type, 7-95 island, 1-5 isolated, 1-5 making temporary, 7-101 moving, 2-10, 4-66 moving isolated nodes, 4-64 obsolete, 2-14, 4-70 reachable, 5-6 reaching, 5-6 removing, 2-13, 4-69 removing obsolete, 2-14, 4-70 setting component number, 7-102 setting cost, 7-103 setting external network ID, 7-104 setting external node ID, 7-105 setting geometry, 7-107 setting geometry ID, 7-106 setting hierarchy level, 7-108 setting measure value, 7-109 setting name, 7-110 setting parent node, 7-111 setting state, 7-112 setting type, 7-113 state of, 5-6 storing information in node information table, 1-15 temporary, 5-6 O obsolete nodes removing, 2-14, 4-70 open path definition, 7-70 specifying for TSP, 7-70 operators topology data model, 1-29 outbound links, 5-6 getting for a node, 7-90 getting link ID numbers, 6-43 getting number of for node, 6-41 out-degree, 5-6 OutOfMemoryError exception raising maximum heap size, 4-76, 7-3 P parent layer, 1-10 parent link getting, 7-13 setting, 7-30 parent node, 5-7 getting ID, 7-91 Index-6 setting for a node, 7-111 partitions getting ID, 7-92 path ID setting, 7-132 path name getting, 7-119 setting, 7-131 path table definition, 5-13 path type setting, 7-133 path-link table definition, 5-13 paths, 7-118 adding, 7-39 checking if active, 7-124 checking if closed, 7-125 checking if connected, 7-126 checking if in logical network, 7-127 checking if simple or complex, 7-128 checking if temporary, 7-129 complex, 5-13 computing the geometry, 7-114 definition, 5-5 deleting, 7-44 getting cost, 7-115 getting end node, 7-116 getting geometry, 7-117 getting name, 7-119 getting node IDs, 7-121 getting number of links, 7-120 getting start node, 7-122 getting type, 7-123 minimum cost, 5-5 returning all, 7-45 setting geometry, 7-130 setting ID, 7-132 setting name, 7-131 setting type, 7-133 simple, 5-13 temporary, 5-6 performance network data model API, 5-16 PL/SQL examples network data model, 5-26 point geometries adding, 4-12 polygon geometries adding, 4-14 PREPARE_FOR_EXPORT procedure, 3-13 primitives See topological elements R reachable nodes, 5-6 reaching nodes, 5-6 READ_NETWORK procedure, 7-65 README file for Spatial, GeoRaster, and topology and network data models, 1-50, 5-61 read-only TopoMap objects, 2-2 referential constraints creating using SDO_NET_MEM.NETWORK_ MANAGER.CREATE_REF_ CONSTRAINTS, 7-51 disabling using SDO_NET_MEM.NETWORK_ MANAGER.DISABLE_REF_ CONSTRAINTS, 7-54 enabling using SDO_NET_MEM.NETWORK_ MANAGER.ENABLE_REF_ CONSTRAINTS, 7-56 RELATE function, 3-14 relationship information table, 1-16 REMOVE_EDGE procedure, 4-68 REMOVE_NODE procedure, 4-69 REMOVE_OBSOLETE_NODES procedure, 4-70 ROLLBACK_TOPO_MAP procedure, 4-71 S SDO network, 5-5 creating, 7-52 SDO nodes adding, 7-40 SDO_EDGE_ARRAY type, 1-26 SDO_GEOMETRY_NETWORK function, 6-51 SDO_LIST_TYPE type, 1-26 SDO_NET package COPY_NETWORK, 6-2 CREATE_LINK_TABLE, 6-3 CREATE_LOGICAL_NETWORK, 6-4 CREATE_LRS_NETWORK, 6-6 CREATE_LRS_TABLE, 6-9 CREATE_NODE_TABLE, 6-10 CREATE_PATH_LINK_TABLE, 6-11 CREATE_PATH_TABLE, 6-12 CREATE_SDO_NETWORK, 6-13 CREATE_TOPO_NETWORK, 6-16 DROP_NETWORK, 6-19 GET_CHILD_LINKS, 6-20 GET_CHILD_NODES, 6-21 GET_GEOMETRY_TYPE, 6-22 GET_IN_LINKS, 6-23 GET_LINK_COST_COLUMN, 6-24 GET_LINK_DIRECTION, 6-25 GET_LINK_GEOM_COLUMN, 6-26 GET_LINK_GEOMETRY, 6-27 GET_LINK_TABLE_NAME, 6-28 GET_LRS_GEOM_COLUMN, 6-29 GET_LRS_LINK_GEOMETRY, 6-30 GET_LRS_NODE_GEOMETRY, 6-31 GET_LRS_TABLE_NAME, 6-32 GET_NETWORK_TYPE, 6-33 GET_NO_OF_HIERARCHY_LEVELS, 6-34 GET_NO_OF_LINKS, 6-35 GET_NO_OF_NODES, 6-36 GET_NODE_DEGREE, 6-37 GET_NODE_GEOM_COLUMN, 6-38 GET_NODE_GEOMETRY, 6-39 GET_NODE_IN_DEGREE, 6-40 GET_NODE_OUT_DEGREE, 6-41 GET_NODE_TABLE_NAME, 6-42 GET_OUT_LINKS, 6-43 GET_PATH_GEOM_COLUMN, 6-44 GET_PATH_TABLE_NAME, 6-45 IS_HIERARCHICAL, 6-46 IS_LOGICAL, 6-47 IS_SPATIAL, 6-48 LRS_GEOMETRY_NETWORK, 6-49 NETWORK_EXISTS, 6-50 reference information, 6-1 SDO_GEOMETRY_NETWORK, 6-51 TOPO_GEOMETRY_NETWORK, 6-52 VALIDATE_LINK_SCHEMA, 6-53 VALIDATE_LRS_SCHEMA, 6-54 VALIDATE_NETWORK, 6-55 VALIDATE_NODE_SCHEMA, 6-56 VALIDATE_PATH_SCHEMA, 6-57 SDO_NET_MAP package using for editing and analysis, 5-9 SDO_NET_MEM package reference information, 7-1 SET_MAX_MEMORY_SIZE, 7-3 SDO_NET_MEM.LINK package GET_CHILD_LINKS, 7-4 GET_CO_LINK_IDS, 7-5 GET_COST, 7-6 GET_END_MEASURE, 7-7 GET_END_NODE_ID, 7-8 GET_GEOM_ID, 7-9 GET_GEOMETRY, 7-10 GET_LEVEL, 7-11 GET_NAME, 7-12 GET_PARENT_LINK_ID, 7-13 GET_SIBLING_LINK_IDS, 7-14 GET_START_MEASURE, 7-15 GET_START_NODE_ID, 7-16 GET_STATE, 7-17 GET_TYPE, 7-18 IS_ACTIVE, 7-19 IS_EXTERNAL_LINK, 7-20 IS_LOGICAL, 7-21 IS_TEMPORARY, 7-22 SET_COST, 7-23 SET_END_NODE, 7-24 SET_GEOM_ID, 7-25 SET_GEOMETRY, 7-26 SET_LEVEL, 7-27 SET_MEASURE, 7-28 SET_NAME, 7-29 SET_PARENT_LINK, 7-30 SET_START_NODE, 7-31 SET_STATE, 7-32 SET_TYPE, 7-33 SDO_NET_MEM.NETWORK package ADD_LINK, 7-34 ADD_LRS_NODE, 7-36 ADD_NODE, 7-38 Index-7 ADD_PATH, 7-39 ADD_SDO_NODE, 7-40 DELETE_LINK, 7-42 DELETE_NODE, 7-43 DELETE_PATH, 7-44 SDO_NET_MEM.NETWORK_MANAGER package ALL_PATHS, 7-45 CREATE_LOGICAL_NETWORK, 7-47 CREATE_LRS_NETWORK, 7-49 CREATE_REF_CONSTRAINTS, 7-51 CREATE_SDO_NETWORK, 7-52 DISABLE_REF_CONSTRAINTS, 7-54 DROP_NETWORK, 7-55 ENABLE_REF_CONSTRAINTS, 7-56 FIND_CONNECTED_COMPONENTS, 7-57 FIND_REACHABLE_NODES, 7-58 FIND_REACHING_NODES, 7-59 IS_REACHABLE, 7-60 LIST_NETWORKS, 7-61 MCST_LINK, 7-62 NEAREST_NEIGHBORS, 7-63 READ_NETWORK, 7-65 SHORTEST_PATH, 7-66 SHORTEST_PATH_DIJKSTRA, 7-68 TSP_PATH, 7-70 VALIDATE_NETWORK_SCHEMA, 7-72 WITHIN_COST, 7-73 WRITE_NETWORK, 7-75 SDO_NET_MEM.NODE package GET_ADJACENT_NODE_IDS, 7-76 GET_CHILD_NODE_IDS, 7-77 GET_COMPONENT_NO, 7-78 GET_COST, 7-79 GET_EXTERNAL_NETWORK_ID, 7-80 GET_EXTERNAL_NETWORK_NAME, 7-81 GET_EXTERNAL_NODE_ID, 7-82 GET_GEOM_ID, 7-83 GET_GEOMETRY, 7-84 GET_HIERARCHY_LEVEL, 7-85 GET_IN_LINK_IDS, 7-86 GET_INCIDENT_LINK_IDS, 7-87 GET_MEASURE, 7-88 GET_NAME, 7-89 GET_OUT_LINK_IDS, 7-90 GET_PARENT_NODE_ID, 7-91 GET_PARTITION_ID, 7-92 GET_SIBLING_NODE_IDS, 7-93 GET_STATE, 7-94 GET_TYPE, 7-95 IS_ACTIVE, 7-96 IS_EXTERNAL_NODE, 7-97 IS_LOGICAL, 7-98 IS_TEMPORARY, 7-99 LINK_EXISTS, 7-100 MAKE_TEMPORARY, 7-101 SET_COMPONENT_NO, 7-102 SET_COST, 7-103 SET_EXTERNAL_NETWORK_ID, 7-104 SET_EXTERNAL_NODE_ID, 7-105 SET_GEOM_ID, 7-106 Index-8 SET_GEOMETRY, 7-107 SET_HIERARCHY_LEVEL, 7-108 SET_MEASURE, 7-109 SET_NAME, 7-110 SET_PARENT_NODE, 7-111 SET_STATE, 7-112 SET_TYPE, 7-113 SDO_NET_MEM.PATH package COMPUTE_GEOMETRY, 7-114 GET_COST, 7-115 GET_END_NODE_ID, 7-116 GET_GEOMETRY, 7-117 GET_LINK_IDS, 7-118 GET_NAME, 7-119 GET_NO_OF_LINKS, 7-120 GET_NODE_IDS, 7-121 GET_START_NODE_ID, 7-122 GET_TYPE, 7-123 IS_ACTIVE, 7-124 IS_CLOSED, 7-125 IS_CONNECTED, 7-126 IS_LOGICAL, 7-127 IS_SIMPLE, 7-128 IS_TEMPORARY, 7-129 SET_GEOMETRY, 7-130 SET_NAME, 7-131 SET_PATH_ID, 7-132 SET_TYPE, 7-133 SDO_NUMBER_ARRAY type, 1-26 SDO_TGL_OBJECT type, 1-22 SDO_TGL_OBJECT_ARRAY type, 1-22 SDO_TOPO package ADD_TOPO_GEOMETRY_LAYER, 3-2 CREATE_TOPOLOGY, 3-4 DELETE_TOPO_GEOMETRY_LAYER, 3-6 DROP_TOPOLOGY, 3-7 GET_FACE_BOUNDARY, 3-8 GET_TOPO_OBJECTS, 3-9 INITIALIZE_AFTER_IMPORT, 3-11 INITIALIZE_METADATA, 3-12 PREPARE_FOR_EXPORT, 3-13 reference information, 3-1 RELATE, 3-14 SDO_TOPO_GEOMETRY constructors, 1-20 SDO_TOPO_GEOMETRY member functions GET_GEOMETRY, 1-24 GET_TGL_OBJECTS, 1-25 GET_TOPO_ELEMENTS, 1-25 SDO_TOPO_GEOMETRY type, 1-19 SDO_TOPO_MAP package ADD_EDGE, 4-2 ADD_ISOLATED_NODE, 4-4 ADD_LINEAR_GEOMETRY, 4-6 ADD_LOOP, 4-8 ADD_NODE, 4-10 ADD_POINT_GEOMETRY, 4-12 ADD_POLYGON_GEOMETRY, 4-14 CHANGE_EDGE_COORDS, 4-16 CLEAR_TOPO_MAP, 4-18 COMMIT_TOPO_MAP, 4-19 CREATE_EDGE_INDEX, 4-20 CREATE_FACE_INDEX, 4-21 CREATE_FEATURE, 4-22 CREATE_TOPO_MAP, 4-26 DROP_TOPO_MAP, 4-28 GET_CONTAINING_FACE, 4-29 GET_EDGE_ADDITIONS, 4-31 GET_EDGE_CHANGES, 4-32 GET_EDGE_COORDS, 4-33 GET_EDGE_DELETIONS, 4-34 GET_EDGE_NODES, 4-35 GET_FACE_ADDITIONS, 4-36 GET_FACE_BOUNDARY, 4-38 GET_FACE_CHANGES, 4-37 GET_FACE_DELETIONS, 4-39 GET_NEAREST_EDGE, 4-40 GET_NEAREST_EDGE_IN_CACHE, 4-42 GET_NEAREST_NODE, 4-44 GET_NEAREST_NODE_IN_CACHE, 4-46 GET_NODE_ADDITIONS, 4-48 GET_NODE_CHANGES, 4-49 GET_NODE_COORD, 4-50 GET_NODE_DELETIONS, 4-51 GET_NODE_FACE_STAR, 4-52 GET_NODE_STAR, 4-53 GET_TOPO_NAME, 4-54 GET_TOPO_TRANSACTION_ID, 4-55 LIST_TOPO_MAPS, 4-56 LOAD_TOPO_MAP, 4-57 MOVE_EDGE, 4-61 MOVE_ISOLATED_NODE, 4-64 MOVE_NODE, 4-66 reference information, 4-1 REMOVE_EDGE, 4-68 REMOVE_NODE, 4-69 REMOVE_OBSOLETE_NODES, 4-70 ROLLBACK_TOPO_MAP, 4-71 SEARCH_EDGE_RTREE_TOPO_MAP, 4-72 SEARCH_FACE_RTREE_TOPO_MAP, 4-74 SET_MAX_MEMORY_SIZE, 4-76 UPDATE_TOPO_MAP, 4-77 VALIDATE_TOPO_MAP, 4-78 VALIDATE_TOPOLOGY, 4-80 SDO_TOPO_OBJECT type, 1-21 SDO_TOPO_OBJECT_ARRAY type, 1-21 sdonm Java client interface, 5-19 sdotopo Java client interface, 1-32 SEARCH_EDGE_RTREE_TOPO_MAP function, 4-72 SEARCH_FACE_RTREE_TOPO_MAP function, 4-74 sequences node, edge, and face privileges needed for cross-schema topology editing, 1-34 SET_COMPONENT_NO procedure, 7-102 SET_COST procedure, 7-23, 7-103 SET_END_NODE procedure, 7-24 SET_EXTERNAL_NETWORK_ID procedure, 7-104 SET_EXTERNAL_NODE_ID procedure, 7-105 SET_GEOM_ID procedure, 7-25, 7-106 SET_GEOMETRY procedure, 7-26, 7-107, 7-130 SET_HIERARCHY_LEVEL procedure, 7-108 SET_LEVEL procedure, 7-27 SET_MAX_MEMORY_SIZE procedure, 4-76, 7-3 SET_MEASURE procedure, 7-28, 7-109 SET_NAME procedure, 7-29, 7-110, 7-131 SET_PARENT_LINK procedure, 7-30 SET_PARENT_NODE procedure, 7-111 SET_PATH_ID procedure, 7-132 SET_START_NODE procedure, 7-31 SET_STATE procedure, 7-32, 7-112 SET_TYPE procedure, 7-33, 7-113, 7-133 SHORTEST_PATH function, 7-66 SHORTEST_PATH_DIJKSTRA function, 7-68 sibling links, 5-7 getting, 7-14 sibling nodes, 5-7 getting, 7-93 simple path, 5-13 checking, 7-128 spanning tree, 5-6 minimum cost, 5-6 spatial network, 5-5 star node, 4-53 node face, 4-52 start measure getting for a link, 7-15 start node getting for a link, 7-16 getting in a path, 7-122 setting for a link, 7-31 state, 5-6 getting for a link, 7-17 getting for a node, 7-94 setting for a link, 7-32 setting for a node, 7-112 T temporary links, 5-6 checking, 7-22 temporary nodes, 5-6 checking for, 7-99 making, 7-101 temporary paths, 5-6 checking for, 7-129 TG_ID attribute of SDO_TOPO_GEOMETRY type, 1-20 TG_LAYER_ID attribute of SDO_TOPO_GEOMETRY type, 1-20 TG_TYPE attribute of SDO_TOPO_GEOMETRY type, 1-20 TOPO_GEOMETRY_NETWORK function, 6-52 topo_map parameter SDO_TOPO subprograms, 2-3 topological elements definition (nodes, edges, faces), 1-6 topology Index-9 clearing map, 4-18 committing map, 4-19 creating, 3-4 creating edge index, 4-20 creating face index, 4-21 creating map, 4-26 deleting (dropping), 3-7 deleting (dropping) map, 4-28 editing, 2-1 export information table format, 1-32 exporting preparing for, 3-13 getting name from TopoMap object, 4-54 hierarchy of geometry layers, 1-9 importing initializing after, 3-11 initializing metadata, 3-12 loading into TopoMap object, 4-57 updating, 4-77 validating, 4-80 topology data model application programming interface (API), 1-29 concepts, 1-3 overview, 1-1 PL/SQL example, 1-34 steps for using, 1-2 subprogram reference information, 3-1, 4-1 topology data types, 1-19 topology export information table, 1-32 topology geometry definition, 1-6 layer, 1-7 topology geometry layer adding, 3-2 definition, 1-7 deleting, 3-6 hierarchical relationships in, 1-9 topology geometry network, 5-5 topology maps listing, 4-56 loading, 4-57 rolling back, 4-71 validating, 4-78 See also TopoMap objects topology operators, 1-29 topology parameter SDO_TOPO subprograms, 2-2, 2-3 topology transaction ID getting, 4-55 TOPOLOGY_ID attribute of SDO_TOPO_ GEOMETRY type, 1-20 TopoMap objects clearing, 4-18 committing changes to the database, 4-19 creating, 4-26 creating edge index, 4-20 creating face index, 4-21 deleting (dropping), 4-28 description, 2-2 getting topology name, 4-54 Index-10 listing, 4-56 loading, 4-57 process for using to edit topologies, 2-3, 2-5 read-only, 2-2 rolling back changes in, 4-71 updatable, 2-2 validating, 4-78 traveling salesman problem TSP_PATH function, 7-70 TSP_PATH function, 7-70 type getting for a node, 7-95 getting for a path, 7-123 getting for link, 7-18 link or node type, 5-6 setting for a link, 7-33 setting for a node, 7-113 U undirected networks, 5-5 unidirected links, 5-5 universe face (F0), 1-5 updatable TopoMap objects, 2-2 UPDATE_TOPO_MAP procedure, 4-77 USER_SDO_NETWORK_CONSTRAINTS view, 5-16 USER_SDO_NETWORK_METADATA view, 5-14 USER_SDO_TOPO_INFO view, 1-26 USER_SDO_TOPO_METADATA view, 1-27 V VALIDATE_LINK_SCHEMA function, 6-53 VALIDATE_LRS_SCHEMA function, 6-54 VALIDATE_NETWORK function, 6-55 VALIDATE_NETWORK_SCHEMA function, 7-72 VALIDATE_NODE_SCHEMA function, 6-56 VALIDATE_PATH_SCHEMA function, 6-57 VALIDATE_TOPO_MAP function, 4-78 VALIDATE_TOPOLOGY procedure, 4-80 W WITHIN_COST function, 7-73 WRITE_NETWORK procedure, 7-75
Source Exif Data:
File Type : PDF File Type Extension : pdf MIME Type : application/pdf PDF Version : 1.3 Linearized : Yes Marked : True Modify Date : 2006:01:04 18:39:16Z Create Date : 2006:01:04 16:29:03Z Page Count : 454 Creation Date : 2006:01:04 16:29:03Z Mod Date : 2006:01:04 18:39:16Z Producer : Acrobat Distiller 5.0.5 (Windows) Author : Oracle Corporation Metadata Date : 2006:01:04 18:39:16Z Creator : Oracle Corporation Title : Oracle Spatial Topology and Network Data Models Page Mode : UseOutlinesEXIF Metadata provided by EXIF.tools