--+\n\nmysql> SET @mpoly =\n       \'MultiPolygon(((0 0,0 3,3 3,3 0,0 0),(1 1,1 2,2 2,2 1,1 1)))\';\nmysql> SELECT ST_Area(ST_GeomFromText(@mpoly));\n+----------------------------------+\n| ST_Area(ST_GeomFromText(@mpoly)) |\n+----------------------------------+\n|                                8 |\n+----------------------------------+\n','https://dev.mysql.com/doc/refman/8.0/en/gis-polygon-property-functions.html');