Question

我有以下触发器：

create or replace trigger CHILD_DOB_TRIGGER
before insert on CHILDREN
for each row
  begin
  if :NEW.CHILD_DOB > sysdate then
  raise_application_error(-20001, 'CHILD_DOB must be greater than current date');
  end if;
  end;
/

但如果我尝试插入：

INSERT INTO CHILDREN 
VALUES ((TO_DATE('2020/05/03', 'yyyy/mm/dd')));

我收到以下错误：

SQL Error: ORA-20001: CHILD_DOB must be greater than current date
ORA-06512: at "USER.CHILD_DOB_TRIGGER", line 3
ORA-04088: error during execution of trigger 'USER.CHILD_DOB_TRIGGER'

Answer 1

您的触发器没有任何问题。由于调用了raise_application_error，它只是抛出异常ORA-20001。

在这种情况下，Oracle会在堆栈中引发更多异常：

您收到的信息是INSERT声明失败

ORA-04088: error during execution of trigger 'USER.CHILD_DOB_TRIGGER'

下一个消息是你的代码异常出现的地方

ORA-06512: at "USER.CHILD_DOB_TRIGGER", line 3

，最后一条消息显示主要问题

ORA-20001: CHILD_DOB must be greater than current date

Answer 2

if：NEW.CHILD_DOB＆gt; sysdate然后 raise_application_error（-20001，'CHILD_DOB必须大于当前日期'）;

如果新插入日期 更高而 SYSDATE ，则会引发用户定义的例外。

TO_DATE（'2020/05/03'，'yyyy / mm / dd'）

上述日期更大比SYSDATE更强大，因此您的触发器完全符合您的要求。

例如，

SQL> CREATE OR REPLACE TRIGGER CHILD_DOB_TRIGGER
  2  before insert on emp
  3  for each row
  4    BEGIN
  5    if :NEW.hiredate > sysdate then
  6    raise_application_error(-20001, 'CHILD_DOB must be greater than current date');
  7    end if;
  8    END;
  9  /

Trigger created.

SQL>
SQL> sho err
No errors.
SQL>
SQL> INSERT INTO emp(hiredate)
  2  VALUES ((TO_DATE('2020/05/03', 'yyyy/mm/dd')));
INSERT INTO emp(hiredate)
            *
ERROR at line 1:
ORA-20001: CHILD_DOB must be greater than current date
ORA-06512: at "LALIT.CHILD_DOB_TRIGGER", line 3
ORA-04088: error during execution of trigger 'LALIT.CHILD_DOB_TRIGGER'


SQL>

Oracle SQL触发器错误 - ORA-06512，ORA-04088

2 个答案: