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From "ASF subversion and git services (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (DERBY-4627) Document how to install your own custom collation for use in sorting and comparing string data values.
Date Thu, 29 Aug 2013 17:22:54 GMT

    [ https://issues.apache.org/jira/browse/DERBY-4627?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13753831#comment-13753831
] 

ASF subversion and git services commented on DERBY-4627:
--------------------------------------------------------

Commit 1518714 from [~chaase3] in branch 'docs/branches/10.10'
[ https://svn.apache.org/r1518714 ]

DERBY-4627  Document how to install your own custom collation for use in sorting and comparing
string data values.

Merged patch DERBY-4627-2.diff to 10.10 doc branch from trunk revision 1517667.
                
> Document how to install your own custom collation for use in sorting and comparing string
data values.
> ------------------------------------------------------------------------------------------------------
>
>                 Key: DERBY-4627
>                 URL: https://issues.apache.org/jira/browse/DERBY-4627
>             Project: Derby
>          Issue Type: Improvement
>          Components: Documentation
>    Affects Versions: 10.6.1.0
>            Reporter: Rick Hillegas
>            Assignee: Kim Haase
>             Fix For: 10.11.0.0
>
>         Attachments: cdevcollationattribs.html, DERBY-4627-2.diff, DERBY-4627.diff, DERBY-4627.stat,
DERBY-4627.zip
>
>
> The Developer's Guide suggests that you are limited to the collations shipped with the
JRE. Consider, for instance, this sentence in the section titled "Character-based collation
in Derby":
> "Derby currently supports only running those rules that can be loaded dynamically from
the running JVM based on the territory attribute. Overrides to these rules by the user are
not supported."
> This is misleading. A long time ago, Knut wrote a blog explaining how to write your own
custom collation, plug it into the JRE, and then use it on string data stored in Derby: http://blogs.sun.com/kah/entry/user_defined_collation_in_apache
> This is a very useful capability of Derby. We should document it.

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