在触发器内部，您不能更改触发器所属的表.
你也不能间接改变那张桌子.

Inside a trigger you cannot alter the table to which the trigger belongs.
Nor can you something which indirectly alters that table.

不过，您还可以做一些其他事情.如果您不删除一行，而是添加一个字段deleted，那么您可以像这样mark将其标记为已删除.

There are however a few other things you can do. If you don't delete a row, but add a field deleted then you can mark it as deleted like so.

delimiter $$
drop trigger w_leb_go $$

CREATE TRIGGER w_leb_go BEFORE UPDATE ON test FOR EACH ROW
BEGIN
  IF NEW.res=3 THEN
    SET NEW.deleted = 1;
  END IF;
END$$

delimiter ;

请注意，如果要更改行中的任何内容，触发器必须在 before 之前.

Note that the trigger must be before if you want to alter anything in the row.

或者，您可以向某个临时表添加删除提醒，并在更新语句之后测试该表.

Alternatively you can add a deletion reminder to some temporary table and test that table after your update statement.

CREATE TRIGGER au_test_each AFTER UPDATE ON test FOR EACH ROW
BEGIN
  IF NEW.res=3 THEN
    INSERT INTO deletion_list_for_table_test (test_id) VALUE (NEW.id);
  END IF;
END$$

现在您需要将更新语句更改为:

Now you need to change your update statement to:

START TRANSACTION;
UPDATE test SET whatever to whichever;
DELETE test FROM test
INNER JOIN deletion_list_for_table_test dt ON (test.id = dt.test_id);
DELETE FROM deletion_list_for_table_test WHERE test_id > 0 /*i.e. everything*/
COMMIT;

当然，如果您标记您的行，您可以将删除代码简化为:

Of course if you mark your rows you can simplify the deletion code to:

START TRANSACTION;
UPDATE test SET whatever to whichever;
DELETE FROM test WHERE deleted = 1;
COMMIT;