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Replace Nth point of linestring with given point. Index is 0-based. Negative index are counted backwards, e.g., -1 is last point. ST_SetPoint

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Signatures

ST_SetPoint (linestring: Geometry, index: Integer, point: Geometry)

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Parameters

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linestring
Geometry
required
The linestring value.
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index
Integer
required
The index value.
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point
Geometry
required
The point value.

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Return type

The resulting geometry.

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Example

SELECT ST_SetPoint(ST_GeomFromText('LINESTRING (0 0, 0 1, 1 1)'), 2, ST_GeomFromText('POINT (1 0)'))

LINESTRING (0 0, 0 1, 1 0)