STRelate (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 is related to another geometry instance, where the relationship is defined by a Dimensionally Extended 9 Intersection Model (DE-9IM) pattern matrix value; otherwise, returns 0.

Syntax

  
.STRelate ( other_geometry, intersection_pattern_matrix )

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 STRelate() is invoked.

intersection_pattern_matrix
Is a string of type nchar(9) encoding acceptable values for the DE-9IM pattern matrix device between the two geometry instances.

Remarks

This method always returns null if the spatial reference IDs (SRIDs) of the geometry instances do not match. This method will throw an ArgumentException if the matrix isn't well formed.

Return Types

SQL Server return type: bit

CLR return type: SqlBoolean

Examples

The following example uses STRelate() to test two geometry instances for spatial disjoint using an explicit DE-9IM pattern.

DECLARE @g geometry;  
DECLARE @h geometry;  
SET @g = geometry::STGeomFromText('LINESTRING(0 2, 2 0, 4 2)', 0);  
SET @h = geometry::STGeomFromText('POINT(5 5)', 0);  
SELECT @g.STRelate(@h, 'FF*FF****');