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From "Mikhail Khludnev (JIRA)" <>
Subject [jira] [Commented] (SOLR-3076) Solr should support block joins
Date Mon, 03 Sep 2012 21:42:07 GMT


Mikhail Khludnev commented on SOLR-3076:


I can't check it right now, can't remember how deep I covered it, but I remember that there
was a test or even level of certainty that nested docs are passed through DisttributedUpdateProcessor
by using a top level doc primary key. Therefore whole block should land into particular shard.
 If this necessary condition is met query side should work out of the box. 
Also you can find about performance benefits
> Solr should support block joins
> -------------------------------
>                 Key: SOLR-3076
>                 URL:
>             Project: Solr
>          Issue Type: New Feature
>            Reporter: Grant Ingersoll
>         Attachments: 27M-singlesegment-histogram.png, 27M-singlesegment.png, bjq-vs-filters-backward-disi.patch,
bjq-vs-filters-illegal-state.patch, child-bjqparser.patch, parent-bjq-qparser.patch, parent-bjq-qparser.patch,
Screen Shot 2012-07-17 at 1.12.11 AM.png, SOLR-3076.patch, SOLR-3076.patch, SOLR-3076.patch,
SOLR-3076.patch, SOLR-3076.patch, SOLR-3076.patch, solrconf-bjq-erschema-snippet.xml, solrconfig.xml.patch,
> Lucene has the ability to do block joins, we should add it to Solr.

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