STBoundary (geometry)#
Returns the boundary of a geometry instance.
Syntax#
.STBoundary ()
Return type#
geometry
Remarks#
STBoundary() returns an empty GeometryCollection when the endpoints for a LineString, CircularString, or CompoundCurve instance are the same.
Example#
Create a LineString geometry instance. STBoundary() returns the boundary of the LineString.
DECLARE @g geometry;
SET @g = geometry::STGeomFromText('LINESTRING(0 0, 2 2, 0 2, 2 0)', 0);
SELECT @g.STBoundary().ToString();