Question

为什么这个程序无法运行？它编译正确，但当我尝试插入某些内容时，它会向我显示此错误： ORA-04098：触发'SAMPLEDATA.BI_STUDENTS'无效且无法重新验证。

create or replace PROCEDURE insert_new_student (
  pName   NVARCHAR2, 
  pPhone NVARCHAR2,
  pReg DATE,      
  pBirth DATE
)
AS
  -- declare variables.
  v_student_id NUMBER;
BEGIN
  -- add a record.
  INSERT INTO STUDENTS (STUDENT_ID, NAME, PHONENUMBER, REGISTRATIONDATE, BIRTHDAY)
  VALUES (student_id_seq.nextval, pName, pPhone, pReg, pBirth)
  RETURNING STUDENT_ID INTO v_student_id;
END insert_new_student;

//

BEGIN
  insert_new_student( 'A', '012345', SYSDATE, '01/26/2017');
END

//

CREATE OR REPLACE EDITIONABLE TRIGGER  "BI_STUDENTS" 
  before insert on "STUDENTS"               
  for each row  
begin   
  if :NEW."STUDENT_ID" is null then 
    select "STUDENTS_SEQ".nextval into :NEW."STUDENT_ID" from sys.dual; 
  end if; 
end;

Answer 1

运行以下内容：
显示错误TRIGGER SAMPLEDATA.BI_STUDENTS;

输出是什么？

运行以下内容：
选择 * 来自user_errors 其中type =＆＃39; TRIGGER＆＃39; 和name =＆＃39; BI_STUDENTS＆＃39;;

结果是什么？

ORA-04098：触发器无效，重新验证失败

1 个答案: