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Posted to derby-dev@db.apache.org by "Mamta A. Satoor (JIRA)" <de...@db.apache.org> on 2005/09/16 05:45:54 UTC

[jira] Updated: (DERBY-573) Provider support for optimizer overrides in Derby.

     [ http://issues.apache.org/jira/browse/DERBY-573?page=all ]

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

    Attachment: optimizeroverrides.html

> Provider 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: 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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