mysql not terminating trigger - mysql

Question

I added a trigger to my mysql database, but when it is used it doesn't terminate. What am I doing wrong?
My query to add the trigger:
DROP TRIGGER IF EXISTS insertResVals;
DELIMITER $$
create trigger insertResVals
AFTER INSERT
ON lastAccess
for each row begin
DECLARE done INT;
DECLARE res varchar(50);
DECLARE val double;
DECLARE sig VARCHAR(140);
DECLARE cur1 CURSOR FOR SELECT resource, value FROM resourceDefault;
DECLARE CONTINUE HANDLER FOR SQLSTATE '02000' SET done = 1;
OPEN cur1;
SET done = 0;
read_loop: LOOP
FETCH cur1 INTO res, val;
IF NOT done THEN
LEAVE read_loop;
END IF;
insert into log
select concat(NEW.playerID, ", ", res, ", ", val);
if res<>null and val<>null THEN
INSERT INTO resourceValue VALUES(NEW.playerID, res, val);
ELSE
set done = 1;
END IF;
END LOOP;
CLOSE cur1;
END $$
DELIMITER ;
Thank you very much
I tried debugging, but the inserting into the log table did not work (I guess because the transaction is never finished).

Answer 1

The problem must be in the following line of code:
...
if res<>null and val<>null THEN
...
as this will always be NULL, and evaluates to FALSE.
Change the 12.3.2. Comparison Functions and Operators <> by IS NOT NULL:
...
IF res IS NOT NULL AND val IS NOT NULL THEN
...
UPDATE
The following trigger works without problem:
/* CODE FOR DEMONSTRATION PURPOSES */
/* Trigger structure for table `lastaccess` */
DROP TRIGGER IF EXISTS `insertResVals`;
DELIMITER $$
CREATE TRIGGER `insertResVals` AFTER INSERT ON `lastaccess`
FOR EACH ROW
BEGIN
DECLARE done INT default 0;
DECLARE res varchar(50);
DECLARE val double;
DECLARE sig VARCHAR(140);
DECLARE cur1 CURSOR FOR SELECT resource, value FROM resourcedefault;
DECLARE CONTINUE HANDLER FOR SQLSTATE '02000' SET done = 1;
OPEN cur1;
SET done = 0;
read_loop: LOOP
FETCH cur1 INTO res, val;
IF done THEN
LEAVE read_loop;
END IF;
insert into log
select concat(NEW.playerid, ", ", res, ", ", val);
if res IS NOT null and val IS NOT null THEN
INSERT INTO resourcevalue VALUES(NEW.playerid, res, val);
ELSE
set done = 1;
END IF;
END LOOP;
CLOSE cur1;
END$$
DELIMITER ;
SQL Fiddle demo