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From "David (JIRA)" <>
Subject [jira] [Commented] (SOLR-2898) Support grouped faceting
Date Tue, 24 Apr 2012 18:03:33 GMT


David commented on SOLR-2898:

I just realized that computing stats on an ungrouped docset still wouldn't work since I still
need to do query facets on price ranges. I have created issue SOLR-3406 to address the problems
described with not having the ability to use facet.query over a grouped docset. 

Martijn: This functionality is critical to my implementation of Solr and I would like to help
develop a solution. You mention in a previous post

The idea I had in mind was to support grouped facets for all facet types and methods. However
this requires a lot of changes in the current code (SimpleFacets class) and I think the code
becomes even more complex then it already is. I was thinking about creating GroupedFacets
class and then step-by-step support more facet types with grouping. But this is just an idea.

Have you started on GroupedFacets? I don't see it in the trunk but wasn't sure if you had
started something locally. I do see a GroupedFacetHit.class commited to trunk but I'm not
sure if that is related.

At any rate I am new to Solr development. Do you think you could point me in the right direction
or give me your vision of how you see this implementation happening.
> Support grouped faceting
> ------------------------
>                 Key: SOLR-2898
>                 URL:
>             Project: Solr
>          Issue Type: New Feature
>            Reporter: Martijn van Groningen
>             Fix For: 4.0
>         Attachments: SOLR-2898.patch, SOLR-2898.patch, SOLR-2898.patch, SOLR-2898.patch
> Support grouped faceting. As described in LUCENE-3097 (matrix counts).

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