MySQL error code 1235

Question

In MySQL I tried to define a trigger like this:

DELIMITER $$  
CREATE TRIGGER vipInvite  
AFTER INSERT ON meetings  
         


        

Answer 1

This error means you already have an AFTER INSERT trigger on meetings table.

If it is the same trigger (meaning vipInvite) that you created earlier and now you want to replace it then you need to drop it first

DROP TRIGGER vipInvite;
DELIMITER $$  
CREATE TRIGGER vipInvite
...
END$$
DELIMITER ;

Now if you have some other trigger you have to merge code from both triggers into one, then drop existing trigger, and then create a new one.

To show the list of existing triggers use SHOW TRIGGERS.

SHOW TRIGGERS WHERE `table` = 'meetings';