ST_DISJOINT(g1,g2)
Returns 1 or 0 to indicate whether geometry g1 is spatially disjoint from (does not intersect with) geometry g2.
ST_DISJOINT() uses object shapes, while DISJOINT(), based on the original MySQL implementation, uses object bounding rectangles.
ST_DISJOINT() tests the opposite relationship to ST_INTERSECTS().
SET @g1 = ST_GEOMFROMTEXT('POINT(0 0)');
SET @g2 = ST_GEOMFROMTEXT('LINESTRING(2 0, 0 2)');
SELECT ST_DISJOINT(@g1,@g2);
+----------------------+
| ST_DISJOINT(@g1,@g2) |
+----------------------+
| 1 |
+----------------------+
SET @g2 = ST_GEOMFROMTEXT('LINESTRING(0 0, 0 2)');
SELECT ST_DISJOINT(@g1,@g2);
+----------------------+
| ST_DISJOINT(@g1,@g2) |
+----------------------+
| 0 |
+----------------------+
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https://mariadb.com/kb/en/st_disjoint/