ST_NumCurves — Return the number of component curves in a CompoundCurve.
integer ST_NumCurves(
geometry a_compoundcurve)
;
Return the number of component curves in a CompoundCurve, zero for an empty CompoundCurve, or NULL for a non-CompoundCurve input.
This method implements the SQL/MM specification. SQL-MM 3: 8.2.6, 8.3.5
This function supports 3d and will not drop the z-index.
-- Returns 3 SELECT ST_NumCurves('COMPOUNDCURVE( (2 2, 2.5 2.5), CIRCULARSTRING(2.5 2.5, 4.5 2.5, 3.5 3.5), (3.5 3.5, 2.5 4.5, 3 5, 2 2) )'); -- Returns 0 SELECT ST_NumCurves('COMPOUNDCURVE EMPTY');
ST_CurveN, ST_Dump, ST_ExteriorRing, ST_NumInteriorRings, ST_NumGeometries