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https://issues.apache.org/jira/browse/LUCENE-1435?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12644773#action_12644773
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Hoss Man commented on LUCENE-1435:
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bq. So, it seems to me, either the user of this functionality has to manage the
versioning external to the Lucene index, or they can't use the functionality .
bq. Would strong warnings in the javadocs be enough to allow people to take
appropriate precautions?
I agree with you on both points ... this is really just an extension of warning
people to use compatible analyzers when indexing/querying.
(I only brought it up in my first comment because i know very little about the
internals of *any* Collator Implementations out there, and i wasn't sure if
*all* Implementations produces keys that were only comparable between "same"
instances .. as long as there are *some* implementations of Collator that
products keys which can be compared between "equivalent" instances, then this
feature certainly seems useful.
> CollationKeyFilter: convert tokens into CollationKeys encoded using
> IndexableBinaryStringTools
> ----------------------------------------------------------------------------------------------
>
> Key: LUCENE-1435
> URL: https://issues.apache.org/jira/browse/LUCENE-1435
> Project: Lucene - Java
> Issue Type: New Feature
> Affects Versions: 2.4
> Reporter: Steven Rowe
> Priority: Minor
> Fix For: 2.9
>
> Attachments: LUCENE-1435.patch
>
>
> Converts each token into its CollationKey using the provided collator, and
> then encodes the CollationKey with IndexableBinaryStringTools, to allow it to
> be stored as an index term.
> This will allow for efficient range searches and Sorts over fields that need
> collation for proper ordering.
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