---------+\nmysql> SELECT ST_Distance(@g1, @g2, \'foot\');\n+-------------------------------+\n| ST_Distance(@g1, @g2, \'foot\') |\n+-------------------------------+\n|             514679.7439273146 |\n+-------------------------------+\n','https://dev.mysql.com/doc/refman/8.0/en/spatial-relation-functions-object-shapes.html');