Re: Hint for using a nested loop for an in subquery

If you want to execute the subquery first, the hint you want is UNNEST in the subquery.

Regards

Jonathan Lewis
http://jonathanlewis.wordpress.com

Author: Cost Based Oracle: Fundamentals
http://www.jlcomp.demon.co.uk/cbo_book/ind_book.html

The Co-operative Oracle Users' FAQ
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• Original Message ----- From: "Ken Naim" <kennaim_at_gmail.com> To: <oracle-l_at_freelists.org> Sent: Friday, November 03, 2006 8:10 PM Subject: Hint for using a nested loop for an in subquery

>I have used a hint in the past to force a query to use a nested loop join
> for a sub query however the name of the hint escapes me. I have googled for
> it unsuccessfully. Anyone remember it offhand?
>
> Query looks like
>
> Select something
> From table1
> Where somethingelse in (select somethingelse from table2 where
> somethingelse2 between x and y)
>
> The ideal plan would evaluate the subquery first then use nested loops
> against an index belonging to table1. I have tried using the no_unnest,
> various index and use_nl hints unsuccessfully.
>
> Thanks,
> Ken
>

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