DELIMITER $$
CREATE OR REPLACE DEFINER=`vn`@`localhost` FUNCTION vn.sectorCollection_hasSalesReserved(vSelf INT)  RETURNS tinyint(1)
DETERMINISTIC
BEGIN
/**
 * Devuelve si sectorCollection tiene reservas 
 * @param vSelf Id de sectorCollection
 * 
 * returns BOOLEAN
 */
	DECLARE vHasSalesReserved BOOLEAN;

	SELECT DISTINCT COUNT(*)  INTO vHasSalesReserved 
		FROM sectorCollection sc
			JOIN sectorCollectionSaleGroup scsg ON sc.id = scsg.sectorCollectionFk 
			JOIN saleGroup sg ON sg.id = scsg.saleGroupFk 
			JOIN saleGroupDetail sgd ON sgd.saleGroupFk  = sg.id 
			JOIN sale s ON s.id = sgd.saleFk  
			JOIN itemShelvingSale iss ON iss.saleFk = s.id
			JOIN saleTracking st ON st.saleFk = s.id
		WHERE sc.id = vSelf;

	RETURN vHasSalesReserved;
END$$
DELIMITER ;