Crosses
CROSSES(g1 Geometry, g2 Geometry)
Alias: ST_CROSSES
Returns 1 if g1 and g2 have only some points which they share and their intersection is of a lower dimension than either g1 or g2. Returns 0 if g1 and g2 do not have any points which they share (DISJOINT) or every point in one of them is shared with the other (CONTAINS).
Result type: integer
Examples:
g1 and g2 share some points but each has some unique points. They intersect at a single POINT, which has a lower dimension than LINESTRING:
SELECT CROSSES(LINEFROMTEXT('LINESTRING(0 0, 10 10)'), LINEFROMTEXT('LINESTRING(0 10, 10 0)'));
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col1
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1
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g1 shares every one of its points with g2:
SELECT CROSSES(POLYFROMTEXT('POLYGON((0 0, 0 10, 10 10, 10 0, 0 0))'), LINEFROMTEXT('LINESTRING(1 9, 9 1)'));
--------------
col1
--------------
0
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g1 and g2 share some points but also have some unique points. They intersect along a LINESTRING, which has the same dimension of both g1 and g2:
SELECT CROSSES(LINEFROMTEXT('LINESTRING(0 10, 6 4)'), LINEFROMTEXT('LINESTRING(4 6, 10 0)'));
--------------
col1
--------------
0
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