Format
SDO_OVERLAPS(geometry1, geometry2);
Description
Checks if any geometries in a table overlap (that is, have the OVERLAPBDYDISJOINT or OVERLAPBDYINTERSECT topological relationship with) a specified geometry. Equivalent to specifying the SDO_RELATE operator with 'mask=OVERLAPBDYDISJOINT+OVERLAPBDYINTERSECT'.
See the section on the SDO_RELATE operator in this chapter for information about the operations performed by this operator and for usage requirements.
For information about 3D support with Spatial and Graph operators (which operators do and do not consider all three dimensions in their computations), see Three-Dimensional Spatial Objects.
Keywords and Parameters
| Value | Description |
|---|---|
|
geometry1 |
Specifies a geometry column in a table. The column must be spatially indexed. Data type is SDO_GEOMETRY. |
|
geometry2 |
Specifies either a geometry from a table or a transient instance of a geometry. (Specified using a bind variable or SDO_GEOMETRY constructor.) Data type is SDO_GEOMETRY. |
Returns
The expression SDO_OVERLAPS(geometry1,geometry2) = 'TRUE' evaluates to TRUE for object pairs that have the OVERLAPBDYDISJOINT or OVERLAPBDYINTERSECT topological relationship, and FALSE otherwise.
Usage Notes
See the Usage Notes for the SDO_RELATE operator in this chapter.
For an explanation of the topological relationships and the nine-intersection model used by Spatial and Graph, see Spatial Relationships and Filtering.
Examples
The following example finds geometries that overlap a query window (here, a rectangle with lower-left, upper-right coordinates 4,6, 8,8). (The example uses the definitions and data described in Simple Example: Inserting_ Indexing_ and Querying Spatial Data and illustrated in Figure 2-1.) In this example, three of the geometries in the SHAPE column overlap the query window geometry.
SELECT c.mkt_id, c.name
FROM cola_markets c
WHERE SDO_OVERLAPS(c.shape,
SDO_GEOMETRY(2003, NULL, NULL,
SDO_ELEM_INFO_ARRAY(1,1003,3),
SDO_ORDINATE_ARRAY(4,6, 8,8))
) = 'TRUE';
MKT_ID NAME
---------- --------------------------------
2 cola_b
1 cola_a
4 cola_d