설명

Returns TRUE if the geometry is a NURBS curve, FALSE otherwise. This function can be used to test geometry types before applying NURBS-specific functions.

Returns NULL if the input is NULL.

Availability: 3.7.0

예시

This example checks whether a geometry is a NURBS curve.

SELECT ST_IsNurbsCurve('NURBSCURVE(2, (0 0, 5 10, 10 0))'::geometry);

t

Figure

This example tests a regular LineString.

SELECT ST_IsNurbsCurve('LINESTRING(0 0,10 10)'::geometry);

f

Figure

참고

ST_MakeNurbsCurve, ST_GeometryType, ST_NurbsCurveIsRational