David Smiley created LUCENE-5735:
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Summary: Faceting for DateRangePrefixTree
Key: LUCENE-5735
URL: https://issues.apache.org/jira/browse/LUCENE-5735
Project: Lucene - Core
Issue Type: New Feature
Components: modules/spatial
Reporter: David Smiley
Assignee: David Smiley
The newly added DateRangePrefixTree (DRPT) encodes terms in a fashion amenable
to faceting by meaningful time buckets. The motivation for this feature is to
efficiently populate a calendar bar chart or
[heat-map|http://bl.ocks.org/mbostock/4063318]. It's not hard if you have date
instances like many do but it's challenging for date ranges.
Internally this is going to iterate over the terms using seek/next with
TermsEnum as appropriate. It should be quite efficient; it won't need any
special caches. I should be able to re-use SPT traversal code in
AbstractVisitingPrefixTreeFilter. If this goes especially well; the underlying
implementation will be re-usable for geospatial heat-map faceting.
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