Question

In Oracle, I attempt to create a view like this

create view ddd as
  select * 
    from myschema1.t1 
         join myschema2.t2 
....

When I run this statement, I get an error ORA-01031 : insufficient privileges. If I just execute the query in Query Worksheet, however, it works.

Why does my CREATE VIEW statement fail and what privileges do I need in order to make the statement succeed?

Answer 1

In order to create a view that references myschema1.t1 and myschema2.t2, the user that owns the view has to be given access to those two tables directly, not via a role. My first guess is that you have been granted the privileges on the underlying table via a role. You can verify that in SQL*Plus by disabling roles and re-running the query. If you do

SQL> set role none;
SQL> select * 
       from myschema1.t1 
            join myschema2.t2 ...

does the query work? If not, then you only have the privileges granted via a role not directly. Note that if you want to be able to grant other users access to your view, you need to be granted privileges on the objects WITH GRANT OPTION.

GRANT SELECT ON myschema1.t1 TO <<user that will own the view>> WITH GRANT OPTION;
GRANT SELECT ON myschema2.t2 TO <<user that will own the view>> WITH GRANT OPTION;

If the problem is not with the privileges on the underlying objects, the problem is most likely that you have not been granted the CREATE VIEW privilege.