ST_ToPoint method for type ST

geometry-expression.ST_ToPoint()

ST_Point If the geometry-expression is of type ST_Point, return the geometry-expression. If the geometry-expression is a geometry collection with a single element of type ST_Point, return that element. If the geometry-expression is the empty set, return an empty set of type ST_Point. Otherwise, raise an exception condition.
The spatial reference system identifier of the result is the same as the spatial reference system of the geometry-expression.

Converts the geometry to a point. The logic is equivalent to that used for CAST( geometry-expression AS ST_Point ).

If geometry-expression is already known to be an ST_Point value, it is more efficient to use TREAT( geometry-expression AS ST_Point ) than the ST_ToPoint method.

Note

By default, ST_ToPoint 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.

ST_ToMultiPoint method for type ST_Geometry

SQL/MM (ISO/IEC 13249-3: 2006) 5.1.33

The following example returns the result Point (1 2).

SELECT NEW ST_GeomCollection( NEW ST_Point(1,2) ).ST_ToPoint().ST_AsText()

ST_ToPoint method for type ST_Geometry

Syntax

Returns

Remarks

Note

See also

Standards and compatibility

Example