DELIMITER $$
CREATE OR REPLACE DEFINER=`root`@`localhost` PROCEDURE `vn`.`supplierPackaging_ReportSource`(
	vFromDated DATE,
	vSupplierFk INT
)
BEGIN
/**
* Selecciona los embalajes de un proveedor a partir de una fecha
*
* @param vFromDated Fecha de la que partir
* @param vSupplierFk Id del proveedor
*/
	SET @vBalance = 0;
	SET @vItemFk = NULL;

	CREATE OR REPLACE TEMPORARY TABLE tSupplierPackaging
		SELECT supplierFk,
				itemFk,
				longName,
				supplier,
				entryFk,
				landed,
				`in`,
				`out`,
				warehouse,
				buyingValue,
				IF (
					NOT (@vItemFk <=> sub.itemFk),
					@vBalance := (`in` - `out`),
					@vBalance := (`in` - `out` + @vBalance)
				) balance,
				@vItemFk := sub.itemFk previousItemFk
			FROM (
				SELECT supplierFk,
						itemFk,
						longName,
						supplier,
						entryFk,
						landed,
						`in`,
						`out`,
						warehouse,
						buyingValue
					FROM supplierPackaging
					WHERE supplierFk = vSupplierFk
						AND landed >= vFromDated
				UNION ALL
				SELECT vSupplierFk,
						itemFk,
						longName,
						supplier,
						'previous',
						vFromDated,
						SUM(`in`),
						SUM(`out`),
						NULL,
						buyingValue
					FROM supplierPackaging
					WHERE supplierFk = vSupplierFk
						AND landed < vFromDated
					GROUP BY itemFk
					ORDER BY itemFk, landed, entryFk
				) sub
			WHERE `out` OR `in`;

	SELECT supplierFk,
			itemFk,
			longName,
			supplier,
			entryFk,
			landed,
			`in`,
			`out`,
			warehouse,
			buyingValue,
			balance
		FROM tSupplierPackaging
		WHERE NOT (NOT balance AND landed < CURDATE() - INTERVAL 1 YEAR);

	DROP TEMPORARY TABLE tSupplierPackaging;
END$$
DELIMITER ;