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https://issues.apache.org/jira/browse/DERBY-4627?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13747398#comment-13747398
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Knut Anders Hatlen commented on DERBY-4627:
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+1 to all of the above (skipping the now redundant material in the first part
of the blog entry, adding a new topic for user-defined ordering, and promoting
the section on case-insensitive databases to a separate topic). Thanks for
picking it up, Kim.
> 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
>
> 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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