salix/db/routines/vn/functions/ticketSplitCounter.sql

DELIMITER $$
CREATE OR REPLACE DEFINER=`root`@`localhost` FUNCTION `vn`.`ticketSplitCounter`(vTicketFk INT)
	RETURNS varchar(15) CHARSET utf8mb3 COLLATE utf8mb3_general_ci
	NOT DETERMINISTIC
	READS SQL DATA
BEGIN
	DECLARE vSplitCounter VARCHAR(15);

	SELECT CONCAT(printedStickers,'/',Total, IF(printedStickers = Total ,' LS','')) INTO vSplitCounter
		FROM
		(
			SELECT count(sl.saleFk) as printedStickers, COUNT(*) as Total
				FROM sale s
					LEFT JOIN saleLabel sl ON sl.saleFk = s.id
				WHERE ticketFk = vTicketFk
		) sub;
        
	RETURN IFNULL(vSplitCounter,'--');
    
END$$
DELIMITER ;