ST_INTERSECTS

Checks if two geometries intersect. Returns 1 if the geometries share any portion of space (interior or boundary), 0 otherwise.

Syntax

ST_INTERSECTS(g1,g2)

Description

Returns 1 or 0 to indicate whether geometry g1 spatially intersects geometry g2.

ST_INTERSECTS() uses object shapes, while INTERSECTS(), based on the original MySQL implementation, uses object bounding rectangles.

ST_INTERSECTS() tests the opposite relationship to ST_DISJOINT().

Examples

SET @g1 = ST_GEOMFROMTEXT('POINT(0 0)');

SET @g2 = ST_GEOMFROMTEXT('LINESTRING(0 0, 0 2)');

SELECT ST_INTERSECTS(@g1,@g2);
+------------------------+
| ST_INTERSECTS(@g1,@g2) |
+------------------------+
|                      1 |
+------------------------+

SET @g2 = ST_GEOMFROMTEXT('LINESTRING(2 0, 0 2)');

SELECT ST_INTERSECTS(@g1,@g2);
+------------------------+
| ST_INTERSECTS(@g1,@g2) |
+------------------------+
|                      0 |
+------------------------+

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