After_tbox_tbox Before_tbox_tbox Left_tbox_tbox Overafter_tbox_tbox Overbefore_tbox_tbox Overleft_tbox_tbox Overright_tbox_tbox Right_tbox_tbox

Before_tbox_tbox() Datum Before_tbox_tbox ( PG_FUNCTION_ARGS  ) Return true if the first temporal box is before the second one @sqlfn tbox_before()