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https://issues.apache.org/jira/browse/LUCENE-3602?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13186864#comment-13186864
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Martijn van Groningen commented on LUCENE-3602:
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I think that joining by docvalues would be great addition! I do think that
joining by indexed terms should be possible to.
To support joining by docvalues we can make a different TermsCollector
implementation, but I'm unsure how the TermsQuery can be used. Can A MTQ also
iterate over docvalues?
I think we should commit what we currently have first and then address joining
by docvalues in a new issue.
> Add join query to Lucene
> ------------------------
>
> Key: LUCENE-3602
> URL: https://issues.apache.org/jira/browse/LUCENE-3602
> Project: Lucene - Java
> Issue Type: New Feature
> Components: modules/join
> Reporter: Martijn van Groningen
> Fix For: 3.6, 4.0
>
> Attachments: LUCENE-3602.patch, LUCENE-3602.patch, LUCENE-3602.patch,
> LUCENE-3602.patch, LUCENE-3602.patch, LUCENE-3602.patch
>
>
> Solr has (psuedo) join query for a while now. I think this should also be
> available in Lucene.
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