'Polygon((3 3,3 6,6 6,6 3,3 3))');
SELECT mbrtouches(@g1,@g2);
+---------------------+
| mbrtouches(@g1,@g2) |
+---------------------+
|                   0 |
+---------------------+

URL: https://mariadb.com/kb/en/mbrtouches/https://mariadb.com/kb/en/mbrtouches/