Cannot create trigger in mysql because of #1193 error code

Question

I want to create a trigger:

CREATE TRIGGER before_insert_klienci
BEFORE INSERT ON `klienci`
FOR EACH ROW
SET `id` = uuid()

Unfortunately I got:

#1193 - Unknown system variable 'id' 

I am completely sure that a column id exists and I have no typo.

Any ideas?

Have a good day, Przemek

Answer 1

You want the new row updated with the UUID, so you just need to tell the trigger where to find the id value you want updated;

CREATE TRIGGER before_insert_klienci
BEFORE INSERT ON `klienci`
FOR EACH ROW
SET NEW.`id` = uuid();

An SQLfiddle to test with.