DELIMITER $$
CREATE OR REPLACE DEFINER=`vn`@`localhost` PROCEDURE `vn`.`machine_getWorkerPlate`(vWorkerFk INT)
BEGIN
/**
 * Selecciona la matrícula del vehículo del workerfk
 *
 * @param vWorkerFk el id del trabajador
 */
	SELECT m.plate
		FROM machine m
			JOIN machineWorker mw ON mw.machineFk = m.id
		WHERE mw.inTimed >= TIMESTAMPADD(HOUR , -12,util.VN_NOW())
			AND ISNULL(mw.outTimed)
			AND mw.workerFk = vWorkerFk;
END$$
DELIMITER ;