DELIMITER $$
CREATE OR REPLACE DEFINER=`vn`@`localhost` PROCEDURE `vn`.`shelving_clean`()
BEGIN

	DELETE FROM shelving
		WHERE length(code) > 3
			AND parked < TIMESTAMPADD(WEEK,-1,util.VN_CURDATE());
	
	DELETE FROM itemShelving
		WHERE visible <= 0
		AND created < TIMESTAMPADD(MONTH,-1,util.VN_CURDATE());

	DELETE ish.* 
		FROM itemShelving ish
			JOIN vn.shelving sh ON sh.code = ish.shelvingFk
			WHERE sh.parkingFk IS NULL
			AND ish.created < TIMESTAMPADD(WEEK,-1,util.VN_CURDATE());

UPDATE shelving sh
	LEFT JOIN itemShelving its ON its.shelvingFk = sh.`code`
		SET isPrinted = 0,
		parkingFk = NULL
	WHERE its.id IS NULL
		AND sh.isRecyclable
		AND (
			sh.parked IS NULL
			OR
			sh.parked < TIMESTAMPADD(MONTH,-1,util.VN_CURDATE())
			)
		AND IF(code REGEXP '^[A-Za-z]{2}[0-9]', LEFT (code, 2) NOT IN (
				SELECT DISTINCT LEFT(its.shelvingFk, 2)
					FROM itemShelving its
					WHERE its.shelvingFk REGEXP '^[A-Za-z]{2}[0-9]'
				), TRUE);

END$$
DELIMITER ;