DELIMITER $$
CREATE OR REPLACE DEFINER=`vn`@`localhost` TRIGGER `vn`.`sharingClient_beforeUpdate`
	BEFORE UPDATE ON `sharingClient`
	FOR EACH ROW
BEGIN
	SET NEW.ended = GREATEST(util.VN_CURDATE(),NEW.ended);
	SET NEW.started = GREATEST(util.VN_CURDATE(),NEW.started);
END$$
DELIMITER ;