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https://issues.apache.org/jira/browse/LUCENE-4965?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Michael McCandless updated LUCENE-4965:
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Attachment: LUCENE-4965.patch
New patch, adds generics to make sure the Range instances are the same class,
and switches to simple ctors instead of .newXXXRange.
I also added RangeFRN ... I only use it for the "sub nodes" and not the root
node.
I don't think we should try to do the sorting here ... I think that's too
simplistic ... we should do an interval tree (but on a new issue).
Eg the simplistic sorting approach can easily fail to speed things up if, say,
most of my values are > max(range.max) (this will be the case with the Jira
search) and you had sorted "smallest to biggest".
> 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: 5.0, 4.4
>
> Attachments: 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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