Cast Functions and Operators combinations, where “MySQL extension”  designates casts implemented in MySQL beyond those defined in the SQL/MM standard: •From  Point  to: • MultiPoint • GeometryCollection •From  LineString  to: • Polygon  (MySQL extension) • MultiPoint  (MySQL extension) • MultiLineString • GeometryCollection •From  Polygon  to: • LineString  (MySQL extension) • MultiLineString  (MySQL extension) • MultiPolygon • GeometryCollection •From  MultiPoint  to: • Point • LineString  (MySQL extension) • GeometryCollection •From  MultiLineString  to: • LineString • Polygon  (MySQL extension) • MultiPolygon  (MySQL extension) • GeometryCollection •From  MultiPolygon  to: • Polygon • MultiLineString  (MySQL extension) • GeometryCollection •From  GeometryCollection  to: • Point 2239