删除后触发不起作用

Question

Here is my code

CREATE TRIGGER `agent_maintenance` AFTER DELETE ON `users`
FOR EACH ROW BEGIN
INSERT INTO deleted_agents (agent_id, fullname, email, mobile_no, deleted) 
SELECT user_id, fullname, email, mobile_no, NOW() FROM user_profiles WHERE user_id = OLD.id;
END
//
DELIMITER ;

Apparently nothing got inserted to table deleted_agents
But when i change the event to BEFORE DELETE it work just fine.
Anyone know what is wrong?

EDITED
Yes there is foreign key constraint inside table user_profiles.
Basically when a row from table user got deleted, it will delete a coresponding row on table user_profiles .

So i make a wrong assumption that a trigger would be executed first before any foreign key constraint action

The best way to do this is to use AFTER DELETE trigger on table user_profiles itself.
Unfortunately mysql dosent activate the trigger on foreign key constraint

Answer 1

难道是因为已删除该行，所以对user_profiles表执行了级联删除触发器，并且WHERE子句找不到user_id？