geometry-expression.ST_IntersectsFilter(geo2)

The ST_IntersectsFilter method provides an efficient test to determine if two geometries might intersect. Returns 1 if the geometry-expression might intersect with geo2, otherwise 0.

This test is less expensive than ST_Intersects, but may return 1 in some cases where the geometries do not actually intersect. Therefore, this method can be useful as a primary filter when further processing will determine if geometries truly intersect.

The implementation of ST_IntersectsFilter relies upon metadata associated with the stored geometries. Because the available metadata may change between server versions, depending upon how the data is loaded, or where ST_IntersectsFilter is used within a query, the expression geometry-expression.ST_IntersectsFilter(geo2) can return different results when geometry-expression does not intersect geo2. Whenever geometry-expression intersects geo2, ST_IntersectsFilter always returns 1.

• ST_Intersects method for type ST_Geometry
• ST_IntersectsRect method for type ST_Geometry