The ST_EqualsFilter method provides an efficient test to determine if a geometry might be equal to another.
ST_EqualsFilter returns 1 if geometry-expression might be equal to geo2; otherwise ST_EqualsFilter returns 0.
This test is cheaper than ST_Equals, but can return 1 in some cases where
the geometry-expression is not actually equal to geo2.
Therefore, This method can be useful as a primary filter when further processing will determine whether geometries
interact in the desired way.
The implementation of ST_EqualsFilter relies upon meta-data associated with the stored geometries.
Because the available meta-data may change between server versions, depending upon how the data is loaded, or
where ST_EqualsFilter is used within a query,
the expression geometry-expression.ST_EqualsFilter(geo2)
can return different results when geometry-expression does not equal
Whenever geometry-expression equals geo2,
ST_EqualsFilter will always return 1.