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,
     add_bidirected_column  IN BOOLEAN DEFALT FALSE,
     storage_parameters     IN VARCHAR2 DEFAULT NULL);

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. (If the geom_type value is not spelled correctly, the geom_column column is not included in the table.)

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 Network Hierarchy.)

add_bidirected_column

TRUE adds a column named BIDIRECTED to the link table; FALSE (the default) does not add a column named BIDIRECTED to the link table.

storage_parameters

Physical storage parameters used internally to create the link table. 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.

Usage Notes

The link table is described in Link Table.

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);