Pre-General Availability Draft: 2017-11-24
MySQL provides a set of useful nonstandard functions for creating geometry values. The functions described in this section are MySQL extensions to the OpenGIS specification.
These functions produce geometry objects from either WKB values or
geometry objects as arguments. If any argument is not a proper WKB
or geometry representation of the proper object type, the return
For example, you can insert the geometry return value from
Point() directly into a
INSERT INTO t1 (pt_col) VALUES(Point(1,2));
GeometryCollection()returns all the proper geometries contained in the argument even if a nonsupported geometry is present.
GeometryCollection()with no arguments is permitted as a way to create an empty geometry.
LineStringvalue from a number of
Pointarguments. If the number of arguments is less than two, the return value is
MultiPolygonvalue from a set of
Pointusing its coordinates.
Polygonvalue from a number of
LineStringarguments. If any argument does not represent a
LinearRing(that is, not a closed and simple
LineString), the return value is