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From "Emmanuel Keller (JIRA)" <>
Subject [jira] Commented: (SOLR-237) Field collapsing
Date Sat, 12 May 2007 14:45:15 GMT


Emmanuel Keller commented on SOLR-237:

I provided two patch.

The first was made off current trunk (see solr-236). And this one (solr-237) for release 1.1.

Is that correct ? Or did I miss something ?

> Field collapsing
> ----------------
>                 Key: SOLR-237
>                 URL:
>             Project: Solr
>          Issue Type: New Feature
>          Components: search
>    Affects Versions: 1.1.0
>            Reporter: Emmanuel Keller
>         Attachments: field_collapsing-1.1.patch, field_collapsing_1.1.0.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."
> The implementation add 3 new query parameters (SolrParams):
> "collapse" set to true to enable collapsing.
> "collapse.field" to choose the field used to group results
> "collapse.max" to select how many continuous results are allowed before collapsing
> TODO (in progress):
> - More documentation (on source code)
> - Test cases 

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