php - 三个mysql触发器

Question

       delimiter //
create trigger logsupdate before update on users
for each row 
begin
  if new.pJailed <> old.pJailed then
    set new.jailtime = now();
     if new.pVIP <> old.pVIP then
    set new.TM2 = now();
         if new.pAdminLevel <> old.pAdminLevel then
    set new.TM3 = now();
  end if;
end;//
delimiter ;

为什么这不起作用？我试图遵循上一个问题的答案，但它在这里给了我错误。

MYSQL 错误

create trigger logsupdate before update on users
for each row 
begin
  if new.pJailed <> old.pJailed then
    set new.jailtime = now();
     if new.pVIP <> old.pVIP then
    set new.TM2 = now();
         if new.pAdminLevel <> old.pAdminLevel then
    set new.TM3 = now();
  end if;
end;
MySQL says: DOCUMENTATION

#1064 - You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near '' at line 11

Answer 1

您错过了几个end if;。另外，end;// 中不需要分号。我还添加了一个 Drop Trigger If Exists 子句以避免错误，以防已存在具有该名称的重复触发器。

这是更正后的触发器(基于 OP's comments ):

delimiter //
DROP TRIGGER IF EXISTS logsupdate //
create trigger logsupdate before update on users
for each row 
begin

  if new.pJailed <> old.pJailed then
    set new.jailtime = now();
  end if;

  if new.pVIP <> old.pVIP then
    set new.TM2 = now();
  end if;

  if new.pAdminLevel <> old.pAdminLevel then
    set new.TM3 = now();
  end if;
end//
delimiter ;