MySQL 触发器 AFTER INSERT ON 'table name' FOR EACH ROW WHEN (role_id = 3)

Question

I want to create trigger which is get specific role_id from table users and trigger insert into table get_roles_request and got some error. Here is the structure Table enter image description here

And Get Some error like this enter image description here

Answer 1

Where is only available to a select , when is only available to a case. An if would do

DELIMITER $ 
CREATE TRIGGER insert_role_request AFTER INSERT ON users 
FOR EACH ROW 
BEGIN 
if (new.role_id = 3) then 
INSERT INTO get_roles_requests (user_id) VALUES (new.id); 
end if;
END $ 
DELIMITER ;