CREATE TRIGGER update_lastupdate_trigger BEFORE UPDATE ON lease FOR EACH ROW EXECUTE PROCEDURE update_lastupdate_column();
CREATE TRIGGER update_lastupdate_trigger BEFORE UPDATE ON switch FOR EACH ROW EXECUTE PROCEDURE update_lastupdate_column();
CREATE TRIGGER update_lastupdate_trigger BEFORE UPDATE ON contact_conference FOR EACH ROW EXECUTE PROCEDURE update_lastupdate_column();

