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https://issues.apache.org/jira/browse/SOLR-2898?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13260763#comment-13260763
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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
{quote}
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.
{quote}
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: https://issues.apache.org/jira/browse/SOLR-2898
> 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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