在嘗試創建名為ghazal_current_bef_upd_row的觸發器時：

create trigger ghazal_current_bef_upd_row

before update on ghazal_current

for each row

when (new.Rating < old.Rating)

begin

insert into ghazal_current_audit

(GhazalName,Old_Rating,New_Rating)

values

(:old.GhazalName,:old.Rating,:new.Rating);

end;

我收到以下錯誤：

Error report:

ORA-04089: cannot create triggers on objects owned by SYS

04089. 00000 - "cannot create triggers on objects owned by SYS"

*Cause: An attempt was made to create a trigger on an object owned by SYS.

*Action: Do not create triggers on objects owned by SYS.

名為ghazals_current和ghazal_current_audit的表都是由SYS創建的.為什么我不能在SYS創建的表上創建觸發器.