PostGIS_HasBBox — Returns TRUE if the bbox of this geometry is cached, FALSE otherwise.
boolean PostGIS_HasBBox(geometry  geomA);
Returns TRUE if the bbox of this geometry is cached, FALSE otherwise. Use PostGIS_AddBBox and PostGIS_DropBBox to control caching.
             This method supports Circular Strings and Curves.
            This method supports Circular Strings and Curves.