Tests if an ST_Geometry type that represents an ST_LineString, GeoSequence, or ST_MultiLineString value is closed.
Valid Data Types
ST_LineString, GeoSequence, and ST_MultiLineString
Result Type
Returns an INTEGER value:
- 1, if the ST_LineString, GeoSequence, or ST_LineString components of an ST_MultiLineString are closed.
- 0, if the ST_LineString, GeoSequence, or ST_LineString components of an ST_MultiLineString are not closed, or if the input geometry is empty.