[jira] [Commented] (SOLR-2604) Backport Join support to Solr 3.x

["Thomas Champagne (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SOLR-2604?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13825222#comment-13825222 ] 

Thomas Champagne commented on SOLR-2604:
----------------------------------------

This issue is not in the good milestone. 
I think it can be closed because it is outdated. 

> Backport Join support to Solr 3.x
> ---------------------------------
>
>                 Key: SOLR-2604
>                 URL: https://issues.apache.org/jira/browse/SOLR-2604
>             Project: Solr
>          Issue Type: New Feature
>          Components: search
>            Reporter: Doug Mittendorf
>            Priority: Minor
>             Fix For: 4.6
>
>         Attachments: SOLR-2604.patch
>
>
> Join support was recently added to Solr trunk (4.0) via SOLR-2272.  We have a need for this functionality, but don't want to upgrade to trunk, so I spent some time back-porting the feature to work with the 3.x APIs.  Not all of the optimizations that Yonik implemented have been ported since the 3.x APIs don't allow the same low-level access to the index, but the basic functionality is in place and seems to work well when joining between an index with 1.2M docs and another with 300k docs.  
> I still have yet to back-port the unit tests as those are heavily dependent on other 4.0 code, but wanted to go ahead and post the initial code in case others can make use of it.



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