STIsClosed (geometry Data Type)
Applies to:
SQL Server
Azure SQL Database
Azure SQL Managed Instance
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 ( )
Note
To view Transact-SQL syntax for SQL Server 2014 (12.x) and earlier versions, see Previous versions documentation.
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
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