"fine grain access policy conflicts with materialized view"
*Cause: A fine grain access control procedure has applied a non-null policy
to the query for the materialized view.
*Action: In order for the materialized view to work correctly, any fine
grain access control procedure in effect for the query must
return a null policy when the materialized view is being
created or refreshed. This may be done by ensuring that the
usernames for the creator, owner, and invoker of refresh
procedures for the materialized view all receive a null policy
by the user-written fine grain access control procedures.