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https://issues.apache.org/jira/browse/SOLR-5027?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13705427#comment-13705427
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Otis Gospodnetic commented on SOLR-5027:
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Q: when you refer to collapsing and grouping, are you saying this is an
alternative implementation to the current impl for field collapsing/grouping?
query results cache is commented out in the patch, on purpose?
> CollapsingQParserPlugin
> -----------------------
>
> Key: SOLR-5027
> URL: https://issues.apache.org/jira/browse/SOLR-5027
> Project: Solr
> Issue Type: New Feature
> Components: search
> Affects Versions: 5.0
> Reporter: Joel Bernstein
> Priority: Minor
> Attachments: SOLR-5027.patch
>
>
> The CollapsingQParserPlugin is a PostFilter that performs field collapsing.
> This allows field collapsing to be done within the normal search flow.
> Initial syntax:
> fq=(!collapse field=<field_name>}
> All documents in a group will be collapsed to the highest ranking document in
> the group.
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