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https://issues.apache.org/jira/browse/DERBY-4627?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13748646#comment-13748646
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Kim Haase commented on DERBY-4627:
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Hi, Knut,
The blog posting that was moved to
https://blogs.oracle.com/kah/entry/user_defined_collation_in_apache links at
the end to a couple of additional files. One of them, the Java file, is visible
if I change the link in the blog from "sun" to "oracle":
https://blogs.oracle.com/kah/resource/200812/MyCollatorProvider.java. The
other, a build.xml file, isn't visible -- though if I do View Page Source in
the browser, I can see it and capture it.
You might consider editing the blog entry to provide the new URLs, and maybe to
warn people about the invisible file (though nobody has complained, so I guess
all the readers are smart enough to figure it out).
> 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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