PostGIS ST_NumInteriorRing Prev 7.4. Geometry Accessors Next Name ST_NumInteriorRing — Returns the number of interior rings (holes) of a Polygon. Aias for ST_NumInteriorRings Synopsis +integer +ST_NumInteriorRing(+`geometry `+a_polygon`)`; See Also ST_NumInteriorRings, ST_InteriorRingN Prev Up Next ST_NumInteriorRings Home ST_NumPatches