ST_MPolyFromWKB(wkb[, srid]), ST_MultiPolygonFromWKB(wkb[, srid])

Constructs a MultiPolygon value using its WKB representation and SRID.

The result is NULL if the WKB or SRID argument is NULL.

URL: https://dev.mysql.com/doc/refman/5.7/en/gis-wkb-functions.html

