5 Topology Operators

This chapter describes operators that you can use with Spatial topology data. For the current release, the only topology operator implemented is SDO_ANYINTERACT.

To use any topology operator, you must understand the following:

The conceptual information about topology in Chapter 1
The information about Spatial operators in Oracle Spatial User's Guide and Reference

Table 5-1 lists the topology operators.

Table 5-1 Topology Operators

Function	Description
SDO_ANYINTERACT	Checks if any geometries in a topology geometry layer have the ANYINTERACT topological relationship with a specified topology geometry layer.

The rest of this chapter provides reference information about this operator.

SDO_ANYINTERACT

Format

SDO_ANYINTERACT(tg1, tg2);

Description

Checks if any geometries in a topology geometry layer have the ANYINTERACT topological relationship with a specified topology geometry layer.

Keywords and Parameters

Value	Description
tg1	Specifies a topology geometry layer. The topology geometry column must be spatially indexed. Data type is SDO_TOPO_GEOMETRY.
tg2	Specifies either a topology geometry layer or a spatial geometry layer. (It cannot be a transient instance of a topology geometry layer specified using a bind variable or SDO_TOPO_GEOMETRY constructor.) Data type is SDO_TOPO_GEOMETRY or SDO_GEOMETRY.

Returns

The expression SDO_ANYINTERACT(tg1,tg2) = 'TRUE' evaluates to TRUE for object pairs that have the ANYINTERACT topological relationship, and FALSE otherwise.

Usage Notes

See the Usage Notes for the SDO_RELATE operator in Oracle Spatial User's Guide and Reference.

Examples

The following example finds all street geometries that have the ANYINTERACT relationship with the land parcel named P3. (The examples for SDO_ANYINTERACT use the data from Example 1-8 in Section 1.11.)

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

The following example finds all land parcel geometries that have the ANYINTERACT relationship with the traffic sign named S1.

SELECT l.feature_name FROM land_parcels l, traffic_signs t
  WHERE t.feature_name = 'S1' AND
    SDO_ANYINTERACT (l.feature, t.feature) = 'TRUE';
 
FEATURE_NAME                                                                    
------------------------------                                                  
P1                                                                              
P2

The following example finds all street geometries that have the ANYINTERACT relationship with a query window.

SQL> SELECT c.feature_name FROM city_streets c WHERE
  2    SDO_ANYINTERACT(
  3      c.feature,
  4      SDO_GEOMETRY(2003, NULL, NULL,
  5        SDO_ELEM_INFO_ARRAY(1, 1003, 3),
  6        SDO_ORDINATE_ARRAY(5,5, 30,40)))
  7  = 'TRUE';
 
FEATURE_NAME                                                                    
------------------------------                                                  
R1                                                                              
R3                                                                              
R4