STOverlaps (geometry Data Type)

THIS TOPIC APPLIES TO:yesSQL Server (starting with 2008)yesAzure SQL DatabasenoAzure SQL Data Warehouse noParallel Data Warehouse

Returns 1 if a geometry instance overlaps another geometry instance. Returns 0 if it does not.

|Applies to: SQL Server ( SQL Server 2008 through current version), Azure SQL Database.|


.STOverlaps ( other_geometry )  


Is another geometry instance to compare against the instance on which STOverlaps() is invoked.

Return Types

SQL Server return type: bit

CLR return type: SqlBoolean


Two geometry instances overlap if the region representing their intersection has the same dimension as the instances do and the region does not equal either instance.

STOverlaps() always returns 0 if the points where the geometry instances intersect are not the same dimension.

This method always returns null if the spatial reference IDs (SRIDs) of the geometry instances do not match.


The following example uses STOverlaps() to test two geometry instances for overlap.

DECLARE @g geometry;  
DECLARE @h geometry;  
SET @g = geometry::STGeomFromText('POLYGON((0 0, 2 0, 2 2, 0 2, 0 0))', 0);  
SET @h = geometry::STGeomFromText('POLYGON((1 1, 3 1, 3 3, 1 3, 1 1))', 0);  
SELECT @g.STOverlaps(@h);  

See Also

OGC Methods on Geometry Instances