STIsRing (geometry Data Type)
Applies To: SQL Server 2014, SQL Server 2016 Preview
Topic Status: Some information in this topic is preview and subject to change in future releases. Preview information describes new features or changes to existing features in Microsoft SQL Server 2016 Community Technology Preview 2 (CTP2).
Returns 1 if a geometry instance fulfills the following requirements:
It is a LineString instance.
It is closed.
It is simple.
Returns 0 if the LineString instance does not meet the requirements.
Applies to: SQL Server (SQL Server 2008 through current version), Azure SQL Database.
The following example creates a LineString instance and uses STIsRing() to test whether the instance is a ring.
DECLARE @g geometry; SET @g = geometry::STGeomFromText('LINESTRING(0 0, 2 2, 1 0, 0 0)', 0); SELECT @g.STIsRing();