ST_ToCurvePoly method for type ST

geometry-expression.ST_ToCurvePoly()

ST_CurvePolygon If the geometry-expression is of type ST_CurvePolygon, return the geometry-expression. If the geometry-expression is a geometry collection with a single element of type ST_CurvePolygon, return that element. If the geometry-expression is the empty set, return an empty set of type ST_CurvePolygon. 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.

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

Note

By default, ST_ToCurvePoly 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.

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

The following example returns the result Polygon ((0 0, 2 0, 1 2, 0 0)).

SELECT NEW ST_MultiPolygon('MultiPolygon(((0 0, 2 0, 1 2, 0 0)))' ).ST_ToCurvePoly()

ST_ToCurvePoly method for type ST_Geometry

Syntax

Returns

Remarks

Note

See also

Standards and compatibility

Example