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https://issues.apache.org/jira/browse/SOLR-3076?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13736417#comment-13736417
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Michael McCandless commented on SOLR-3076:
------------------------------------------
I don't understand all the design constraints here, but I really don't like
that the internal fork (full copy) of the ToParent/ChildBlockJoinQuery sources.
Why is this necessary? Is it to cutover to the top-level filter cache?
We should not fork our sources if we can help it ...
> Solr(Cloud) should support block joins
> --------------------------------------
>
> Key: SOLR-3076
> URL: https://issues.apache.org/jira/browse/SOLR-3076
> Project: Solr
> Issue Type: New Feature
> Reporter: Grant Ingersoll
> Assignee: Yonik Seeley
> Fix For: 4.5, 5.0
>
> Attachments: 27M-singlesegment-histogram.png, 27M-singlesegment.png,
> bjq-vs-filters-backward-disi.patch, bjq-vs-filters-illegal-state.patch,
> child-bjqparser.patch, dih-3076.patch, dih-config.xml,
> parent-bjq-qparser.patch, parent-bjq-qparser.patch, Screen Shot 2012-07-17 at
> 1.12.11 AM.png, SOLR-3076-childDocs.patch, SOLR-3076.patch, SOLR-3076.patch,
> SOLR-3076.patch, SOLR-3076.patch, SOLR-3076.patch, SOLR-3076.patch,
> SOLR-3076.patch, SOLR-3076.patch, SOLR-3076.patch, SOLR-3076.patch,
> SOLR-3076.patch, SOLR-3076.patch, SOLR-3076.patch,
> SOLR-7036-childDocs-solr-fork-trunk-patched,
> solrconf-bjq-erschema-snippet.xml, solrconfig.xml.patch,
> tochild-bjq-filtered-search-fix.patch
>
>
> Lucene has the ability to do block joins, we should add it to Solr.
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