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From "Mamta A. Satoor (JIRA)" <derby-...@db.apache.org>
Subject [jira] Updated: (DERBY-573) Provide support for optimizer overrides in Derby.
Date Wed, 09 Nov 2005 07:43:20 GMT
     [ http://issues.apache.org/jira/browse/DERBY-573?page=all ]

Mamta A. Satoor updated DERBY-573:
----------------------------------

    Summary: Provide support for optimizer overrides in Derby.  (was: Provider support for
optimizer overrides in Derby.)

> 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: 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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