Virtual column not allowed here

Question

I am trying to insert a row in a table using VIEW as

INSERT INTO FIELDI18N(LANGUAGE_ID) VALUES (1);

but it gives me following error:

Error starting at line 5 in command:
INSERT INTO FIELDI18N(LANGUAGE_ID) VALUES (1)
Error at Command Line:5 Column:22
Error report:
SQL Error: ORA-01733: virtual column not allowed here
01733. 00000 -  "virtual column not allowed here"
*Cause:    
*Action:

Any Clue ?

Added the View Definition:

CREATE OR REPLACE VIEW FIELDI18N("FIELDID", "NAME", "TYPE", "DESCRIPTION", "LANGUAGE_ID")
AS
  (SELECT field.fieldid,
    field.type,
    NVL(i18n.name, field.name) name,
    NVL(i18n.description, field.description) description,
    i18n.language_id
  FROM fields field
  JOIN i18n_fields i18n
  ON (field.fieldid    = i18n.fieldid)
  );

Answer 1

LANGUAGE_ID is probably a calculated field, or in any case the database cannot infer what change is to be made to the tables underlying the view based on the change you are requiring. Have to see the view definition code to know.

Answer 2

I believe that in order to do an insert or update using a view that all of the tables in the view must be joined via a primary key. This is to prevent duplicates caused by the view which cannot be updated.