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https://issues.apache.org/jira/browse/LUCENE-1279?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12595467#action_12595467
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Steven Rowe commented on LUCENE-1279:
-------------------------------------
bq. Hmmm... excellent point. you convinced me.
Okay. :) At your (previous) suggestion, I have redone the patch (will attach
shortly), moving the collating stuff into RangeQuery and RangeFilter, with
enabling bits in QueryParser and ConstantScoreRangeQuery. I put WARNING text
in the javadoc for each method that invokes the expensive index Term iteration,
so hopefully that will give pause to those who might otherwise unwittingly slow
things down.
bq. BTW: if hooks for CollatingRangeQuery are added to QueryParser, it
shouldn't use this class just because a Locale is specified - that would cause
some unexpected results for people who have been specifying a Locale for date
reasons. a new "setter" would need to indicate when to pay attention to
Collation.
I added a new setter to QueryParser for this purpose: {{
setRangeCollator(Collator) }}.
> RangeQuery and RangeFilter should use collation to check for range inclusion
> ----------------------------------------------------------------------------
>
> Key: LUCENE-1279
> URL: https://issues.apache.org/jira/browse/LUCENE-1279
> Project: Lucene - Java
> Issue Type: Improvement
> Components: Search
> Affects Versions: 2.3.1
> Reporter: Steven Rowe
> Priority: Minor
> Fix For: 2.4
>
> Attachments: LUCENE-1279.patch
>
>
> See [this java-user
> discussion|http://www.nabble.com/lucene-farsi-problem-td16977096.html] of
> problems caused by Unicode code-point comparison, instead of collation, in
> RangeQuery.
> RangeQuery could take in a Locale via a setter, which could be used with a
> java.text.Collator and/or CollationKey's, to handle ranges for languages
> which have alphabet orderings different from those in Unicode.
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