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https://issues.apache.org/jira/browse/LUCENE-5648?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13991652#comment-13991652
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Ere Maijala commented on LUCENE-5648:
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Since it will be date-based, can you make sure it also works with BC dates?
Last time looked at the date implementation, it didn't handle the minus sign
properly in ISO 8601 dates.
> Index/search multi-valued time durations
> ----------------------------------------
>
> Key: LUCENE-5648
> URL: https://issues.apache.org/jira/browse/LUCENE-5648
> Project: Lucene - Core
> Issue Type: New Feature
> Components: modules/spatial
> Reporter: David Smiley
> Assignee: David Smiley
>
> If you need to index a date/time duration, then the way to do that is to have
> a pair of date fields; one for the start and one for the end -- pretty
> straight-forward. But if you need to index a variable number of durations per
> document, then the options aren't pretty, ranging from denormalization, to
> joins, to using Lucene spatial with 2D as described
> [here|http://wiki.apache.org/solr/SpatialForTimeDurations]. Ideally it would
> be easier to index durations, and work in a more optimal way.
> This issue implements the aforementioned feature using Lucene-spatial with a
> new single-dimensional SpatialPrefixTree implementation. Unlike the other two
> SPT implementations, it's not based on floating point numbers. It will have a
> Date based customization that indexes levels at meaningful quantities like
> seconds, minutes, hours, etc. The point of that alignment is to make it
> faster to query across meaningful ranges (i.e. [2000 TO 2014]) and to enable
> a follow-on issue to facet on the data in a really fast way.
> I'll expect to have a working patch up this week.
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