DELIMITER $$
CREATE OR REPLACE DEFINER=`root`@`localhost` TRIGGER `vn`.`invoiceOut_beforeInsert`
	BEFORE INSERT ON `invoiceOut`
	FOR EACH ROW
BEGIN
	DECLARE vRef CHAR(10) ;

	IF YEAR(NEW.issued) <= 2021 THEN

		SELECT CONCAT(NEW.serial,
				IFNULL(RIGHT(MAX(i.ref), LENGTH(i.ref)-1) ,
					RPAD(CONCAT(c.sage200Company, RIGHT(YEAR(util.VN_CURDATE()), 2)), 7,'0')) + 1) INTO vRef
			FROM invoiceOut i
				LEFT JOIN company c ON c.id = i.companyFk
			WHERE i.serial = NEW.serial
				AND i.issued BETWEEN util.firstDayOfYear(NEW.issued) AND util.dayEnd(util.lastDayOfYear(NEW.issued))
				AND c.id = NEW.companyFk;
	ELSE

		SELECT CONCAT(NEW.serial,
				IFNULL(RIGHT(MAX(i.ref), LENGTH(i.ref)-1) ,
					RPAD(CONCAT(c.sage200Company, RIGHT(YEAR(util.VN_CURDATE()), 2)), 8,'0')) + 1) INTO vRef
			FROM invoiceOut i
				LEFT JOIN company c ON c.id = i.companyFk
			WHERE i.serial = NEW.serial
				AND i.issued BETWEEN util.firstDayOfYear(NEW.issued) AND util.dayEnd(util.lastDayOfYear(NEW.issued))
				AND c.id = NEW.companyFk;
	END IF;

	SET NEW.ref = vRef;
END$$
DELIMITER ;