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

DELIMITER $$
CREATE OR REPLACE DEFINER=`vn`@`localhost` FUNCTION `vn`.`ticketTotalVolume`(vTicketId INT)
	RETURNS decimal(10,3)
	NOT DETERMINISTIC
	READS SQL DATA
BEGIN
	-- Devuelte el volumen total del ticket sumado

	DECLARE vVolume DECIMAL(10,3);

        SELECT SUM(volume) INTO vVolume
			FROM saleVolume
			WHERE ticketFk = vTicketId;
    RETURN vVolume;

END$$
DELIMITER ;