How to use " WITH " clause in MySQL trigger? - mysql

Question

I am trying to write a Mysql query . I am getting some error on WITH clause of select function .
This is the sample query :
CREATE TRIGGER SAMPLE BEFORE INSERT ON SERVER
FOR EACH ROW
BEGIN
IF ((SELECT COUNT(S.ID) FROM SERVER S WITH UR) >= (SELECT L.SERVERS FROM SAMPLE L WHERE L.ID = 1 LIMIT 1)) THEN
SIGNAL SQLSTATE '73550' SET MESSAGE_TEXT='+ID';
END IF;
END;
and i am getting the error :
right syntax to use near 'UR) >= (SELECT L.SERVERS FROM SAMPLE L WHERE L.ID = 1 LIMIT 1))
Is WITH clause doesn't support in Mysql ? Or any other syntax should i use ? Any suggestion would helpful .
update :
Also i am using another query :
CREATE TRIGGER SAMPLE_TRIGGER NO CASCADE BEFORE INSERT ON TABLE_1
FOR EACH ROW
BEGIN
SET NEW.RID = (SELECT ID FROM TABLE_2 WHERE ACTIVE=0 FETCH FIRST 1 ROWS ONLY WITH RS USE AND KEEP EXCLUSIVE LOCKS);
IF (NEW.RID IS NULL) THEN
SIGNAL SQLSTATE '73550' SET MESSAGE_TEXT='+ID';
END IF;
END;
getting another error
right syntax to use near 'LIMIT 1 WITH RS USE AND KEEP EXCLUSIVE LOCKS);
IF (NEW.RID IS NULL) THEN'

Answer 1

In DB2, with ur means "with uncommitted read". This is a locking mechanism in the database, as explained here.
If you are porting code to MySQL, I would not worry about this. So, just remove it:
CREATE TRIGGER SAMPLE BEFORE INSERT ON SERVER
FOR EACH ROW
BEGIN
IF ((SELECT COUNT(S.ID) FROM SERVER S) >= (SELECT L.SERVERS FROM SAMPLE L WHERE L.ID = 1 LIMIT 1)) THEN
SIGNAL SQLSTATE '73550' SET MESSAGE_TEXT='+ID';
END IF;
END;