STNumGeometries (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 the number of geometries that comprise a geometry instance.
This method returns 1 if the geometry instance is not a MultiPoint, MultiLineString, MultiPolygon, or GeometryCollection instance, and 0 if the geometry instance is empty.
If a GeometryCollection has nested empty elements, STNumGeometries() will not return 0. Though the elements in the GeometryCollection instance are empty, the instance itself is not an empty set.