[ http://issues.apache.org/jira/browse/DERBY-573?page=all ]
Mamta A. Satoor updated DERBY-573:
----------------------------------
Attachment: derby572OptimizerOverridesAndUpgrade121205.txt
Submitting another patch to JIRA after doing a sync on the client (The
Grant/Revoke checkin touched quite a bit of the files that I have modified). I
have run the tests and no new failures with the patch.
> Provide support for optimizer overrides in Derby.
> -------------------------------------------------
>
> Key: DERBY-573
> URL: http://issues.apache.org/jira/browse/DERBY-573
> Project: Derby
> Type: New Feature
> Components: SQL
> Versions: 10.2.0.0
> Reporter: Mamta A. Satoor
> Assignee: Mamta A. Satoor
> Attachments: derby572OptimizerOverridesAndUpgrade120605.txt,
> derby572OptimizerOverridesAndUpgrade121105.txt,
> derby572OptimizerOverridesAndUpgrade121205.txt,
> derby573OptimierOverrides110805.txt, optimizeroverrides.html,
> optimizeroverrides.html
>
> Derby's query optimizer usually makes the best choice of join order and
> access path. The default join strategy ususally works the best too. However,
> there are some cases in which user may want to override the optimizer or the
> default values. Providing support for optimizer overrides will allow users to
> hand-tune the optimizer for queries.
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