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From "Michael McCandless (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SOLR-2524) Adding grouping to Solr 3x
Date Thu, 19 May 2011 16:08:47 GMT

    [ https://issues.apache.org/jira/browse/SOLR-2524?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13036270#comment-13036270
] 

Michael McCandless commented on SOLR-2524:
------------------------------------------

{quote}
bq. Was this a simple TermQuery

No a MatchDocAllQuery (:)
{quote}

Ahh OK then that makes sense -- MatchAllDocsQuery is a might fast query to execute ;)  So
the work done to cache it is going to be slower.

> Adding grouping to Solr 3x
> --------------------------
>
>                 Key: SOLR-2524
>                 URL: https://issues.apache.org/jira/browse/SOLR-2524
>             Project: Solr
>          Issue Type: New Feature
>    Affects Versions: 3.2
>            Reporter: Martijn van Groningen
>            Assignee: Michael McCandless
>         Attachments: 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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