Re: Hint for using a nested loop for an in subquery
- From: "Jonathan Lewis" <jonathan@xxxxxxxxxxxxxxxxxx>
- To: <kennaim@xxxxxxxxx>, <oracle-l@xxxxxxxxxxxxx>
- Date: Fri, 3 Nov 2006 20:52:33 -0000
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
http://www.jlcomp.demon.co.uk/faq/ind_faq.html
----- Original Message -----
From: "Ken Naim" <kennaim@xxxxxxxxx>
To: <oracle-l@xxxxxxxxxxxxx>
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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