ACS3 Data Model

     1: function on_vacation_p (vacation_until IN date) return CHAR
     2: IS
     3: BEGIN
     4: 	IF (vacation_until is not null) AND (vacation_until >= sysdate) THEN
     5: 		RETURN 't';
     6: 	ELSE
     7: 		RETURN 'f';
     8: 	END IF;
     9: END;