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From "Mikhail Khludnev (Jira)" <>
Subject [jira] [Commented] (SOLR-13892) Add postfilter support to {!join} queries
Date Tue, 05 Nov 2019 18:35:00 GMT


Mikhail Khludnev commented on SOLR-13892:

{!join score=none} switches execution to

as a result of these, complexity of operation is proportional to number of values under "from"-side
of join. As you remind, classic {!join} complexity is proportional of number of terms at "to"-side
despite of "from"-side selectivity. 

> Add postfilter support to {!join} queries
> -----------------------------------------
>                 Key: SOLR-13892
>                 URL:
>             Project: Solr
>          Issue Type: Improvement
>      Security Level: Public(Default Security Level. Issues are Public) 
>          Components: query parsers
>    Affects Versions: master (9.0)
>            Reporter: Jason Gerlowski
>            Priority: Major
>         Attachments: SOLR-13892.patch
> The JoinQParserPlugin would be a lot performant in many use-cases if it could operate
as a post-filter, especially when doc-values for the involved fields are available.
> With this issue, I'd like to propose a post-filter implementation for the {{join}} qparser.

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