DELIMITER $$
CREATE OR REPLACE DEFINER=`vn`@`localhost` PROCEDURE `vn`.`worker_updateBalance`(vSelf INT(11), vCredit DECIMAL(10,2), vDebit DECIMAL(10,2))
BEGIN
/**
 * Actualiza la columna balance de worker.
 *
 * @param selfFk, credit, debit
 */
	UPDATE worker
		SET balance = IFNULL(balance, 0) + IFNULL(vCredit, 0) - IFNULL(vDebit, 0)
		WHERE id = vSelf;
END$$
DELIMITER ;