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https://issues.apache.org/jira/browse/LUCENE-4965?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13799938#comment-13799938
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ASF subversion and git services commented on LUCENE-4965:
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Commit 1533782 from [~rcmuir] in branch 'dev/branches/lucene4956'
[ https://svn.apache.org/r1533782 ]
LUCENE-4965: don't expose this as a large hashmap with thousands of arrays
> Add dynamic numeric range faceting
> ----------------------------------
>
> Key: LUCENE-4965
> URL: https://issues.apache.org/jira/browse/LUCENE-4965
> Project: Lucene - Core
> Issue Type: Improvement
> Components: modules/facet
> Reporter: Michael McCandless
> Assignee: Michael McCandless
> Fix For: 4.4, 5.0
>
> Attachments: LUCENE-4965.patch, LUCENE-4965.patch, LUCENE-4965.patch,
> LUCENE-4965.patch, LUCENE-4965.patch, LUCENE-4965.patch, LUCENE-4965.patch,
> LUCENE-4965.patch
>
>
> The facet module today requires the app to compute the hierarchy
> at index time, eg a timestamp field might use a year/month/day
> hierarchy.
> While this gives great performance, since it minimizes the search-time
> computation, sometimes it's unfortunately useful/necessary to do things
> entirely at
> search time, like Solr does.
> E.g. I'm playing with a prototype Lucene search for Jira issues
> and I'd like to add a drill down+sideways for "Updated in past day,
> 2 days, week, month" etc. But because time is constantly advancing,
> doing this at index time is a not easy ...
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