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 less expensive 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 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_EqualsFilter is used within a query,
the expression geometry-expression.ST_EqualsFilter(geo2) can return different results when geometry-expression does not equal geo2. Whenever geometry-expression equals geo2, ST_EqualsFilter always returns 1.