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https://issues.apache.org/jira/browse/SOLR-5536?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Joel Bernstein updated SOLR-5536:
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Attachment: SOLR-5536.patch
Added header to a class, so this patch passes precommit.
> Add ValueSource collapse criteria to CollapsingQParsingPlugin
> -------------------------------------------------------------
>
> Key: SOLR-5536
> URL: https://issues.apache.org/jira/browse/SOLR-5536
> Project: Solr
> Issue Type: Improvement
> Components: search
> Affects Versions: 4.6
> Reporter: Joel Bernstein
> Assignee: Joel Bernstein
> Priority: Minor
> Fix For: 5.0, 4.7
>
> Attachments: SOLR-5536.patch, SOLR-5536.patch, SOLR-5536.patch
>
>
> It would be useful for the CollapsingQParserPlugin to support ValueSource
> collapse criteria.
> Proposed syntax:
> {code}
> fq={!collapse field=collapse_field max=value_source}
> {code}
> This ticket will also introduce a function query called "cscore", which will
> return the score of the current document being collapsed. This will allow
> score to be incorporated into collapse criteria functions.
> A simple example of the cscore usage:
> {code}
> fq={!collapse field=collapse_field max=sum(cscore(), field(x))}
> {code}
>
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