ST_GEOMETRYN

Returns the N-th geometry in a GeometryCollection. Geometries are numbered beginning with 1.

Syntax

ST_GeometryN(gc,N)
GeometryN(gc,N)

Description

Returns the N-th geometry in the GeometryCollection gc. Geometries are numbered beginning with 1.

ST_GeometryN() and GeometryN() are synonyms.

Example

SET @gc = 'GeometryCollection(Point(1 1),LineString(12 14, 9 11))';

SELECT AsText(GeometryN(GeomFromText(@gc),1));
+----------------------------------------+
| AsText(GeometryN(GeomFromText(@gc),1)) |
+----------------------------------------+
| POINT(1 1)                             |
+----------------------------------------+

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