ST_MPOLYFROMTEXT

ST_MPolyFromText(wkt[, srid [, options]]),
ST_MultiPolygonFromText(wkt[, srid [, options]])

Constructs a MultiPolygon value using its WKT representation and SRID.

These functions handle their arguments as described in the introduction
to this section.

URL: https://dev.mysql.com/doc/refman/8.0/en/gis-wkt-functions.html