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List:       solr-dev
Subject:    [jira] Commented: (SOLR-236) Field collapsing
From:       "Nuno Leitao (JIRA)" <jira () apache ! org>
Date:       2007-07-28 0:57:53
Message-ID: 12215642.1185584273387.JavaMail.jira () brutus
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    [ https://issues.apache.org/jira/browse/SOLR-236?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12516119 \
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Nuno Leitao commented on SOLR-236:
----------------------------------

It would be nice for this patch to also report on what documents were actually \
*collapsed* - for example, if the result list contained:

doc1
doc2
doc3

and doc2 and doc3 were collapsed, this would be reflected in the XML result as, so \
that one could determine that (forgive my crap visual representation):

doc1
 -> doc2
 -> doc3

Regards.

> 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
> Attachments: field_collapsing_1.1.0.patch, SOLR-236-FieldCollapsing.patch, \
> SOLR-236-FieldCollapsing.patch, SOLR-236-FieldCollapsing.patch 
> 
> This patch include a new feature called "Field collapsing".
> "Used in order to collapse a group of results with similar value for a given 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 documents from this site" link. See \
> also Duplicate detection." http://www.fastsearch.com/glossary.aspx?m=48&amid=299
> 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 collapsing
> 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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