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https://issues.apache.org/jira/browse/SOLR-2524?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13063284#comment-13063284
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Yuriy Akopov commented on SOLR-2524:
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I suppose I'm late with these questions, but could you please acknowledge if
the following is correct:
1) The functionality from this patch was included into Solr 3.3, so no need to
apply it to any version >= 3.3
2) This patch (as well as the collapsing functionality in 3.3) doesn't allow
calculation of facet numbers after collapsing. Faceting is still possible for
collapsed results but the numbers returned for facets are always calculated
before collapsing the results.
3) In order to calculate facets after collapsing, LUCENE-3097 must be applied
to Solr 3.3.
Thanks.
> Adding grouping to Solr 3x
> --------------------------
>
> Key: SOLR-2524
> URL: https://issues.apache.org/jira/browse/SOLR-2524
> Project: Solr
> Issue Type: New Feature
> Reporter: Martijn van Groningen
> Assignee: Martijn van Groningen
> Fix For: 3.3
>
> Attachments: SOLR-2524.patch, SOLR-2524.patch, SOLR-2524.patch,
> SOLR-2524.patch, SOLR-2524.patch, SOLR-2524.patch
>
>
> Grouping was recently added to Lucene 3x. See LUCENE-1421 for more
> information.
> I think it would be nice if we expose this functionality also to the Solr
> users that are bound to a 3.x version.
> The grouping feature added to Lucene is currently a subset of the
> functionality that Solr 4.0-trunk offers. Mainly it doesn't support grouping
> by function / query.
> The work involved getting the grouping contrib to work on Solr 3x is
> acceptable. I have it more or less running here. It supports the response
> format and request parameters (expect: group.query and group.func) described
> in the FieldCollapse page on the Solr wiki.
> I think it would be great if this is included in the Solr 3.2 release. Many
> people are using grouping as patch now and this would help them a lot. Any
> thoughts?
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