Oracle DB触发器错误如何解决？

Question

我编写了一个数据库触发器来监视插入操作。插入一条新记录后，我想自动将 CREATION_DATE 设置为 sysdate。

我想插入一条新记录时出错：

error
ORA-04091: table REPORT is mutating, trigger/function may not see it
ORA-06512: at "CREATION_DATE_TEST", line 2
ORA-04088: error during execution of trigger 'CREATION_DATE_TEST'

我的代码：

 CREATE OR REPLACE TRIGGER creation_date_test 
 AFTER INSERT ON REPORT FOR EACH ROW 
 BEGIN  
   UPDATE REPORT set CREATION_DATE = sysdate
   WHERE ROWID = :new.ROWID;
 END;

我也试过用PROJECT_ID = new.PROJECT_ID替换ROWID = :new.ROWID。它抛出同样的错误。

Answer 1

听起来您只需要一个插入前触发器来设置 :new.creation_date

create or replace trigger creation_date_test
  before insert on report
  for each row
begin
  :new.creation_date := sysdate;
end;

Oracle DB触发器错误如何解决？

How to solve the Oracle DB trigger error?

oracle

triggers

plsql

database-trigger