ORA-04091: 表 COMPANY 發(fā)生了變化, 觸發(fā)器/函數(shù)不能讀它。
create or replace trigger TR_U_ID_SYNCH
  before update on COMPANY

referencing old as old_value new as new_value
  for each row
declare
tId  company.id%type;
PRAGMA AUTONOMOUS_TRANSACTION;
begin
if :new_value.U_ID is not null and :new_value.U_ID!=ld_value.U_ID  then
   select t.t_id into tId from company t where t.id= :new_value.U_ID;
   :new_value.P_ID :=:new_value.U_ID;
   :new_value.T_ID :=tId;
end if;
COMMIT;
end TR_CO_GB_ID_SYNCH;