12.14.3 Functions That Create Geometry Values from WKB Values

These functions take as arguments a BLOB containing a Well-Known Binary (WKB) representation and, optionally, a spatial reference system identifier (SRID). They return the corresponding geometry.

As of MySQL 5.0.82, these functions also accept geometry objects for compatibility with the changes made in MySQL 5.0.82 to the return value of the functions in Section 12.14.4, “MySQL-Specific Functions That Create Geometry Values”. Thus, those functions may continue to be used to provide the first argument to the functions in this section.

GeomFromWKB() accepts a WKB value of any geometry type as its first argument. Other functions provide type-specific construction functions for construction of geometry values of each geometry type.

For a description of WKB format, see Section 11.5.3.1.2, “Well-Known Binary (WKB) Format”.