I expect an error but I dont get what I would think

I create a view

SQL> create view DEPT20 AS
  2  select empno AS Employee_ID_ID,ename AS Employee, deptno as Department_ID from emp
  3  where deptno = 20
  4  with check option constraint emp_dept_20;

  View created.

I expect to get this error

ORA-01402: view WITH CHECK OPTION where-clause violation

开发者_Python百科But I dont get an error I get

SQL> update dept20
2  set    department_ID=30
3  where  Employee='Smith';

0 rows updated.

SQL>

Normally I like no errors but in this one I want the error when someone tries to go outside the allowed.

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What happens if you run this SQL?

update dept20
set    department_ID=30
where  Employee='SMITH'; 

If you're using the canonical EMP table, all the employees' names are in uppercase.