ST_EQUALS(g1,g2)
Returns 1
or 0
to indicate whether geometry g1
is spatially equal to geometry g2
.
ST_EQUALS() uses object shapes, while EQUALS(), based on the original MySQL implementation, uses object bounding rectangles.
SET @g1 = ST_GEOMFROMTEXT('LINESTRING(174 149, 176 151)'); SET @g2 = ST_GEOMFROMTEXT('LINESTRING(176 151, 174 149)'); SELECT ST_EQUALS(@g1,@g2); +--------------------+ | ST_EQUALS(@g1,@g2) | +--------------------+ | 1 | +--------------------+
SET @g1 = ST_GEOMFROMTEXT('POINT(0 2)'); SET @g1 = ST_GEOMFROMTEXT('POINT(2 0)'); SELECT ST_EQUALS(@g1,@g2); +--------------------+ | ST_EQUALS(@g1,@g2) | +--------------------+ | 0 | +--------------------+
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https://mariadb.com/kb/en/st_equals/