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Return the 0-based Nth geometry if the geometry is a GEOMETRYCOLLECTION, (MULTI)POINT, (MULTI)LINESTRING, MULTICURVE or (MULTI)POLYGON. Otherwise, return null ST_GeometryN

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Signatures

ST_GeometryN(geom: Geometry, n: Integer)

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Parameters

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geom
Geometry
required
The input geometry.
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n
Integer
required
The index or count value.

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Return type

The resulting geometry.

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Example

SELECT ST_GeometryN(ST_GeomFromText('MULTIPOINT((1 2), (3 4), (5 6), (8 9))'), 1)

POINT (3 4)