CREATE OR REPLACE FUNCTION seattleDelete RETURNS trigger AS DECLARE re

CREATE OR REPLACE FUNCTION seattleDelete()
RETURNS trigger AS $$
DECLARE
	result Boolean;
BEGIN

SELECT age(OLD.hire_date) < '21 years'::interval INTO result;

if result then
	DELETE FROM employees 
	where first_name = OLD.first_name AND 
	last_name = OLD.last_name AND 
	hire_date = OLD.hire_date;

	RETURN OLD;
END IF;
RETURN NULL;
END;
$$ LANGUAGE PLPGSQL SECURITY DEFINER;

DROP TRIGGER seattle_employees_delete ON seattle_employees;
CREATE TRIGGER seattle_employees_delete INSTEAD OF delete on
seattle_employees FOR EACH ROW EXECUTE
PROCEDURE seattleDelete();