DELIMITER $$
CREATE OR REPLACE DEFINER=`vn`@`localhost` PROCEDURE `vn`.`buy_checkGrouping`(vGrouping INT)
BEGIN
/**
 * Checks the buy grouping, throws an error if it's invalid.
 *
 * @param vGrouping The grouping
 */
	IF vGrouping = 0 THEN
		SIGNAL SQLSTATE '45000'
			SET MESSAGE_TEXT = 'Grouping cannot be zero';
	END IF;
END$$
DELIMITER ;