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Posted to dev@lucene.apache.org by "Ere Maijala (JIRA)" <ji...@apache.org> on 2014/05/07 09:55:47 UTC
[jira] [Commented] (LUCENE-5648) Index/search multi-valued time
durations
[ https://issues.apache.org/jira/browse/LUCENE-5648?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13991652#comment-13991652 ]
Ere Maijala commented on LUCENE-5648:
-------------------------------------
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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