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https://issues.apache.org/jira/browse/DERBY-4627?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13750304#comment-13750304
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ASF subversion and git services commented on DERBY-4627:
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Commit 1517620 from [~chaase3] in branch 'docs/trunk'
[ https://svn.apache.org/r1517620 ]
DERBY-4627 Document how to install your own custom collation for use in
sorting and comparing string data values.
Modified 2 Developer's Guide topics and added 6, breaking the original topics
up to make the content more visible and adding another one on installing your
own custom collation.
Patch: DERBY-4627.diff
> 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
> Attachments: 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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