ST_NumInteriorRing() method

Returns the number of interior rings in the curve polygon.

Syntax

curvepolygon-expression.ST_NumInteriorRing()

INT Returns the number of interior rings in the curve polygon.

Example 1 – The following example returns the result 1.

SELECT NEW ST_CurvePolygon('CurvePolygon ( CircularString (2 0, 5 3, 2 0), (3 1, 4 2, 5 1, 3 1) )')
.ST_NumInteriorRing()

SQL/MM (ISO/IEC 13249-3: 2006) 8.2.5