DELIMITER $$
CREATE OR REPLACE DEFINER=`vn`@`localhost` PROCEDURE `vn`.`itemMinimumQuantity_check`(
	vSelf INT,
	vItemFk INT,
	vStarted DATE,
	vEnded DATE,
	vWarehouseFk INT
)
BEGIN
	DECLARE vHasCollision BOOL;

	IF vStarted IS NULL THEN
		CALL util.throw('The field "started" cannot be null');
	END IF;

	SELECT COUNT(*) INTO vHasCollision 
		FROM itemMinimumQuantity 
		WHERE vItemFk = itemFk
			AND ((vStarted <= ended OR ended IS NULL)
				AND (vStarted >= `started` OR vEnded IS NULL))
			AND (vWarehouseFk <=> warehouseFk)
			AND vSelf <> id;

	IF vHasCollision THEN
		CALL util.throw('A line with the same configuration already exists');
	END IF;
END$$
DELIMITER ;