Re: inline views & unions & other schemas; ora 9.2.0.6 bug?

If you can associate the problem with particular views in certain cases, then you may be able to bypass the problem by referencing that view with a no_merge hint. This is likely to make the query run more slowly - but slow may be better than crashing.

select /*+ no_merge(viewx) */ ..
from

... , viewx, ....

where ...

You may even find that a global view will work in this context (though I haven't tried it) , e.g.

    viewQ includes viewA

select /*+ no_merge( viewQ.viewA) */ .. from

... , viewQ, ....

where ...

Regards

Jonathan Lewis
http://www.oracle.com/technology/community/oracle_ace/ace1.html#lewis

The Co-operative Oracle Users' FAQ
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• Original Message ----- From: "cosmin ioan" <cosmini_at_yahoo.com> To: <oracle-l_at_freelists.org> Sent: Friday, October 06, 2006 1:01 AM Subject: inline views & unions & other schemas; ora 9.2.0.6 bug?

hello all, I'm getting an ORA-03001 --"unimplemented feature" when I'm trying to select off a view based on other views (in turn based on other views... multiple levels, etc) containing UNIONS and INLINE VIEWS, in some pretty big ORA Apps modules.

  I am **only** getting this error when querying from a different schema, and even then, it happens intermittently, on some instances, on some particular selects in a long UNION set.

  I do not get the error when trying to select **from within** the owner's schema.
  I've tried to reduce the problem to the simplest tables/queries but still cannot put my finger on the issue other than the fact that..the problem seems to go away if I do not use UNION to pull in more sets data.... however this is needed... I traced this to a Metalink article:

  Subject: Ora-3001: "Unimplemented Feature" On Query Using "WITH" and FGAC   Doc ID: Note:361345.1 Type: PROBLEM
  Last Revision Date: 15-MAR-2006 Status: MODERATED

  Has anyone seen anything like this before, ...how can this typically be circumvented?
  (I have query_rewrite_enabled=true, etc)

  my initial thought would be to create/populate some adhoc global temporary tables, do this preloading of a pretty huge ora apps summary beforehand.... or...fix this somehow (the part I'm interested).... or basically to turn (simplistically speaking) a query such as   line1, 1,2,3,4,5,6 from dual (a horizontal layout) into a vertical one   line1
  1
  2
  3
  4
  5

  in effect eliminating the current UNIONS which are causing me this current headache?

  thx much,
  Cosmin

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