ORA-01776: I can't insert on a view comprised by two tables

Question

Good morning:
I'm trying to do an insertion on a view comprised by the join of two tables (departments and employees) and it failed.
The view is this one:
CREATE OR REPLACE FORCE VIEW "EMPDPTO" ("EMPLOYEE_ID", "LAST_NAME", "EMAIL", "HIRE_DATE", "JOB_ID", "DEPARTMENT_ID", "DEPARTMENT_NAME") AS
SELECT employee_id, last_name, email, hire_date, job_id, d.department_id, department_name
FROM employees e, departments d
WHERE e.department_id = d.department_id
My insertion command
INSERT INTO empdpto
VALUES(743, 'Bermejo', '[email protected]', '12/12/09', 'IT_PROG', 10, 'Administration');
throws a ORA-01776: it's not possible to modify more than one base table through a join union.
On the other side I've seen in documentation that in certain circunstances is possible to do an insertion on a complex view.
Is it possible to do an insertion on a view comprised by two tables?. Under what circunstances?.
Thanks

Answer 1

From SQL Reference CREATE VIEW section Notes on Updatable Views http://download.oracle.com/docs/cd/B19306_01/server.102/b14200/statements_8004.htm#i2065510
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If you want a join view to be updatable, then all of the following conditions must be true:
The DML statement must affect only one table underlying the join.
For an INSERT statement, the view must not be created WITH CHECK OPTION, and all columns into which values are inserted must come from a key-preserved table. A key-preserved table is one for which every primary key or unique key value in the base table is also unique in the join view.
For an UPDATE statement, the view must not be created WITH CHECK OPTION, and all columns updated must be extracted from a key-preserved table.
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The first condition is not true for the view you have created.
Edited by: P. Forstmann on 26 janv. 2010 20:17