ST_NumInteriorRings

RETURNS number of interior rings of polygon geometries.

Signatures

ST_NumInteriorRings(geom: Geometry)

geom

Geometry

required

The input geometry.

An integer value.

SELECT ST_NumInteriorRings(ST_GeomFromText('POLYGON ((0 0, 0 5, 5 5, 5 0, 0 0), (1 1, 2 1, 2 2, 1 2, 1 1))'))

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