6.9 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, 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, orTOPO_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, thegeom_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);
Parent topic: SDO_NET Package Subprograms