DELIMITER $$
CREATE OR REPLACE DEFINER=`vn`@`localhost` PROCEDURE `vn`.`workerCalendar_calculateYear`(vYear INT, vWorkerFk INT)
BEGIN

/**
 * Calcula los días y horas de vacaciones en función de un trabajador y año
 *
 * @param vYear 
 * @param vWorkerFk 
 * @return tmp.workerCalendarCalculateYear (days, hours, daysEnjoyed, hoursEnjoyed)
 */	
	DECLARE vDone BOOL;
	DECLARE vBusinessFk INT;

	DECLARE cur CURSOR FOR
		SELECT b.id 
			FROM business b
			WHERE vYear BETWEEN YEAR(b.started) AND IFNULL(YEAR(b.ended), vYear) 
				AND b.workerFk = vWorkerFk;

	DECLARE CONTINUE HANDLER FOR NOT FOUND
		SET vDone = TRUE;	
	
	DROP TEMPORARY TABLE IF EXISTS tmp.workerCalendarCalculateYear;

	CREATE TEMPORARY TABLE tmp.workerCalendarCalculateYear
			(days DEC(5,2), 
			 hours DEC(5,2),
			 daysEnjoyed DEC(5,2), 
			 hoursEnjoyed DEC(5,2)) 
		ENGINE = MEMORY;
	INSERT INTO tmp.workerCalendarCalculateYear VALUES(0, 0, 0, 0);
				
	OPEN cur;

	l: LOOP
		SET vDone = FALSE;
		FETCH cur INTO vBusinessFk;

		IF vDone THEN
			LEAVE l;
		END IF;

		CALL workerCalendar_calculateBusiness(vYear, vBusinessFk);
		UPDATE tmp.workerCalendarCalculateYear w
				JOIN tmp.workerCalendarCalculateBusiness wc 
			SET w.days = w.days + wc.days,
				w.hours = w.hours + wc.hours,
				w.daysEnjoyed = w.daysEnjoyed + wc.daysEnjoyed,
				w.hoursEnjoyed = w.hoursEnjoyed + wc.hoursEnjoyed;
			
		DROP TEMPORARY TABLE tmp.workerCalendarCalculateBusiness;

	END LOOP;

	CLOSE cur;

END$$
DELIMITER ;