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Date: Mon, 20 Jun 2011 14:45:47 +0000 (UTC)
From: =?utf-8?Q?Jan_H=C3=B8ydahl_=28JIRA=29?= <jira@apache.org>
To: dev@lucene.apache.org
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 <1006482487.20780.1308581147571.JavaMail.tomcat@hel.zones.apache.org>
Subject: [jira] [Commented] (SOLR-236) Field collapsing
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    [ https://issues.apache.org/jira/browse/SOLR-236?page=3Dcom.atlassian.j=
ira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=3D130519=
95#comment-13051995 ]=20

Jan H=C3=B8ydahl commented on SOLR-236:
----------------------------------

I think you should consider the group by now included in 3_x branch (SOLR-2=
524 was recently committed)

> Field collapsing
> ----------------
>
>                 Key: SOLR-236
>                 URL: https://issues.apache.org/jira/browse/SOLR-236
>             Project: Solr
>          Issue Type: New Feature
>          Components: search
>    Affects Versions: 1.3
>            Reporter: Emmanuel Keller
>            Assignee: Shalin Shekhar Mangar
>             Fix For: 3.3
>
>         Attachments: DocSetScoreCollector.java, NonAdjacentDocumentCollap=
ser.java, NonAdjacentDocumentCollapserTest.java, SOLR-236-1_4_1-NPEfix.patc=
h, SOLR-236-1_4_1-paging-totals-working.patch, SOLR-236-1_4_1.patch, SOLR-2=
36-FieldCollapsing.patch, SOLR-236-FieldCollapsing.patch, SOLR-236-FieldCol=
lapsing.patch, SOLR-236-branch_3x.patch, SOLR-236-distinctFacet.patch, SOLR=
-236-trunk.patch, SOLR-236-trunk.patch, SOLR-236-trunk.patch, SOLR-236-trun=
k.patch, SOLR-236-trunk.patch, SOLR-236.patch, SOLR-236.patch, SOLR-236.pat=
ch, SOLR-236.patch, SOLR-236.patch, SOLR-236.patch, SOLR-236.patch, SOLR-23=
6.patch, SOLR-236_collapsing.patch, SOLR-236_collapsing.patch, collapsing-p=
atch-to-1.3.0-dieter.patch, collapsing-patch-to-1.3.0-ivan.patch, collapsin=
g-patch-to-1.3.0-ivan_2.patch, collapsing-patch-to-1.3.0-ivan_3.patch, fiel=
d-collapse-3.patch, field-collapse-4-with-solrj.patch, field-collapse-5.pat=
ch, field-collapse-5.patch, field-collapse-5.patch, field-collapse-5.patch,=
 field-collapse-5.patch, field-collapse-5.patch, field-collapse-5.patch, fi=
eld-collapse-5.patch, field-collapse-5.patch, field-collapse-5.patch, field=
-collapse-5.patch, field-collapse-5.patch, field-collapse-5.patch, field-co=
llapse-5.patch, field-collapse-5.patch, field-collapse-solr-236-2.patch, fi=
eld-collapse-solr-236.patch, field-collapsing-extended-592129.patch, field_=
collapsing_1.1.0.patch, field_collapsing_1.3.patch, field_collapsing_dsteig=
erwald.diff, field_collapsing_dsteigerwald.diff, field_collapsing_dsteigerw=
ald.diff, quasidistributed.additional.patch, solr-236.patch
>
>
> This patch include a new feature called "Field collapsing".
> "Used in order to collapse a group of results with similar value for a gi=
ven field to a single entry in the result set. Site collapsing is a special=
 case of this, where all results for a given web site is collapsed into one=
 or two entries in the result set, typically with an associated "more docum=
ents from this site" link. See also Duplicate detection."
> http://www.fastsearch.com/glossary.aspx?m=3D48&amid=3D299
> The implementation add 3 new query parameters (SolrParams):
> "collapse.field" to choose the field used to group results
> "collapse.type" normal (default value) or adjacent
> "collapse.max" to select how many continuous results are allowed before c=
ollapsing
> TODO (in progress):
> - More documentation (on source code)
> - Test cases
> Two patches:
> - "field_collapsing.patch" for current development version
> - "field_collapsing_1.1.0.patch" for Solr-1.1.0
> P.S.: Feedback and misspelling correction are welcome ;-)

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