STOverlaps (geometry Data Type)

Article
05/23/2023

Applies to: SQL Server Azure SQL Database Azure SQL Managed Instance SQL analytics endpoint in Microsoft Fabric Warehouse in Microsoft Fabric

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

Syntax

  
.STOverlaps ( other_geometry )

Note

To view Transact-SQL syntax for SQL Server 2014 (12.x) and earlier versions, see Previous versions documentation.

Arguments

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

Remarks

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.

Examples

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);