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From "Kim Haase (JIRA)" <j...@apache.org>
Subject [jira] Updated: (DERBY-3855) The Tuning guide should mention that LIKE transformations/optimizations are disabled when using territory-based collations
Date Wed, 27 Aug 2008 21:03:44 GMT

     [ https://issues.apache.org/jira/browse/DERBY-3855?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Kim Haase updated DERBY-3855:
-----------------------------

    Attachment: rtuntransform208.html
                DERBY-3855.diff

This seems like a fairly simple fix, Rick, with all the information you provided. Attaching
DERBY-3855.diff and rtuntransform208.html, which I hope are correct. I added a cross-reference
to the main information about territory-based collation in the Dev Guide.

> The Tuning guide should mention that LIKE transformations/optimizations are disabled
when using territory-based collations
> --------------------------------------------------------------------------------------------------------------------------
>
>                 Key: DERBY-3855
>                 URL: https://issues.apache.org/jira/browse/DERBY-3855
>             Project: Derby
>          Issue Type: Improvement
>    Affects Versions: 10.3.3.0, 10.4.1.3, 10.5.0.0
>            Reporter: Rick Hillegas
>            Assignee: Kim Haase
>         Attachments: DERBY-3855.diff, rtuntransform208.html
>
>
> The Tuning Guide section titled "LIKE transformations" describes transformations and
optimizations which Derby performs on LIKE expressions in order to avoid full table scans.
These transformations/optimizations are disabled when using territory-based collations. See
DERBY-3854. The Tuning Guide does not mention this fact but it is likely that this information
would be very useful to customers and tech support engineers. The "LIKE transformations" 
section in the Tuning Guide should be changed to mention that LIKE transformations/optimizations
are disabled when using territory-based collations.

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