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https://issues.apache.org/jira/browse/SOLR-6234?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14086577#comment-14086577
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Mikhail Khludnev commented on SOLR-6234:
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damn, the last patch doesn't use {{multiVals}} as a component at
equals/hashcode. It's not a big deal, because the param itself seems pretty
useless. Anyway, I can fixed it in a few mins, if you want to apply the patch.
> Scoring modes for query time join
> ----------------------------------
>
> Key: SOLR-6234
> URL: https://issues.apache.org/jira/browse/SOLR-6234
> Project: Solr
> Issue Type: New Feature
> Components: query parsers
> Affects Versions: 5.0, 4.10
> Reporter: Mikhail Khludnev
> Attachments: SOLR-6234.patch, lucene-join-solr-query-parser-0.0.2.zip
>
>
> it adds {{scorejoin}} query parser which calls Lucene's JoinUtil underneath.
> It supports:
> - {{score=none|avg|max|total}} local param (passed as ScoreMode to JoinUtil),
> also
> - supports {{b=100}} param to pass {{Query.setBoost()}}.
> So far
> - -it always passes {{multipleValuesPerDocument=true}}-
> {{multiVals=true|false}} is introduced
> - -it doesn't cover cross core join case,- it covers cross-core join but
> rather opportunistically.I just can't find the multicore testcase in Solr
> test, I appreciate if you point me on one.
> - -I attach standalone plugin project, let me know if somebody interested, I
> convert it into the proper Solr codebase patch. Also please mention the
> blockers!- done. thanks for your attitude!
> - so far it joins string and multivalue string fields (Sorted, SortedSet,
> Binary), but not Numerics DVs. follow-up LUCENE-5868
> Note: the development of this patch was sponsored by an anonymous contributor
> and approved for release under Apache License.
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