ST_Z(DOUBLE) method for type ST_Point

ST_Z(DOUBLE) method for type ST_Point

Returns a copy of the point with the z coordinate set to the specified zcoord value.

Note

If the point-expression is an empty geometry (ST_IsEmpty()=1), then this method returns NULL.

Note

By default, ST_Z uses the original format for a geometry, if it is available. Otherwise, the internal format is used. For more information about internal and original formats, see STORAGE FORMAT clause, CREATE SPATIAL REFERENCE SYSTEM statement.

Syntax

point-expression.ST_Z(zcoord)

Parameters

Name	Type	Description
zcoord	DOUBLE	The new z-coordinate value.

Returns

ST_Point Returns a copy of the point with the z coordinate set to the specified zcoord value.
The spatial reference system identifier of the result is the same as the spatial reference system of the point-expression.

Standards and compatibility

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