此触发器的MySQL语法正确吗？

Question

Trying to create a simple trigger that after a table update, it checks if a count (InvalidLogins) is over 4, and if so, sets the field 'LockedOut' to 1. Below is how I am attempting to create the trigger, this is my first trigger for MySQL though and I can't get it to work.

CREATE TRIGGER update_user_lockout after update ON members
FOR EACH ROW SET LockedOut = 1 where invalidLogins < 4

The error that MySQL returns is: Error Code: 1064. You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '.LockedOut = 1 where invalidLogins < 4' at line 2

Answer 1

delimiter |
CREATE TRIGGER update_user_lockout before update ON members
FOR EACH ROW 
    IF NEW.invalidLogins < 4 THEN
        SET NEW.LockedOut = 1;
    END IF;
END
|
delimiter ;

• The current record can be referenced with NEW
• Choose another delimiter than ; . Otherwise the trigger definition will end at the first ; which is too early
• Use a before trigger to change values before updating