STIsClosed (geometry Data Type)

**APPLIES TO:** SQL Server (starting with 2008) Azure SQL Database Azure SQL Data Warehouse Parallel Data Warehouse

Returns 1 if the start and end points of the given geometry instance are the same. Returns 1 for geometrycollection types if each contained geometry instance is closed. Returns 0 if the instance is not closed.

Syntax

  
.STIsClosed ( )  

Return Types

SQL Server return type: bit

CLR return type: SqlBoolean

Remarks

This method returns 0 if any figures of a geometry instance are points, or if the instance is empty.

All Polygon instances are considered closed.

Examples

The following example creates a LineString instance and uses STIsClosed() to test if the LineString is closed.

DECLARE @g geometry;  
SET @g = geometry::STGeomFromText('LINESTRING(0 0, 2 2, 1 0)', 0);  
SELECT @g.STIsClosed();  

See Also

OGC Methods on Geometry Instances