The ST_CoveredByFilter method provides an efficient test to determine if one geometry might be covered by the other.
This test is less expensive than ST_CoveredBy, but may return 1 in some cases where the geometry-expression is not actually covered by 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_CoveredByFilter 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_CoveredByFilter is used within
a query, the expression geometry-expression.ST_CoveredByFilter(geo2) can return different results when geometry-expression is not covered by geo2. Whenever geometry-expression is covered by geo2, ST_CoveredByFilter always returns 1.