CREATE FUNCTION "URX_PUBLIC"."_drop_raster_constraint_blocksize"(rastschema name, rasttable name, rastcolumn name, axis text) 
 RETURNS boolean AS 
$BODY$
	BEGIN
		IF lower($4) != 'width' AND lower($4) != 'height' THEN
			RAISE EXCEPTION 'axis must be either "width" or "height"';
			RETURN FALSE;
		END IF;

		RETURN  "URX_PUBLIC"._drop_raster_constraint($1, $2, 'enforce_' || $4 || '_' || $3);
	END;
	$BODY$
 LANGUAGE 'plpgsql' VOLATILESTRICT ;