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From "Jonathan Rochkind (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SOLR-2272) Join
Date Tue, 26 Apr 2011 22:21:03 GMT

    [ https://issues.apache.org/jira/browse/SOLR-2272?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13025479#comment-13025479
] 

Jonathan Rochkind commented on SOLR-2272:
-----------------------------------------

This is a feature that would be very useful to me, thus I've had a watch 
on the ticket.

I am not a solr committer and have never even contributed a patch, just 
a user. But this is a feature I've been wanting for a while, and would 
be excited to see it in Solr.  On the one hand I see the argument that 
it would ideally go at the lucene layer; on the other hand, if someone 
has working, tested, well-written code that is is ready at the Solr 
layer, as a user, I'd really like to see it go in there, to be 
refactored to lucene at a later date when/if someone else has 
time/interest -- rather than delaying working code indefinitely for 
hypothetical future (potentially time-consuming) refactoring at a 
different layer by yet-to-be-volunteered labor.

I put this in only to make clear that there are users in the general 
population who would like to see this feature get into Solr sooner 
rather than later, delaying it does matter to 'ordinary' users. (I am 
neither a Solr contractor nor a customer of a Solr contracter, I don't 
have any such 'business interests', I am just an in-house developer who 
writes (open source) software on top of Solr. Not that there's anything 
wrong with being a Solr contractor, it's a fine way to fund open source 
development and I think it's odd to imply there's something wrong with 
it; I'm just saying I'm not one.)

Hopefully you committers can work it out amongst yourself in a way that 
balances the codebase's architectural health with the need to get 
working code out there.


> Join
> ----
>
>                 Key: SOLR-2272
>                 URL: https://issues.apache.org/jira/browse/SOLR-2272
>             Project: Solr
>          Issue Type: New Feature
>          Components: search
>            Reporter: Yonik Seeley
>             Fix For: 4.0
>
>         Attachments: SOLR-2272.patch, SOLR-2272.patch, SOLR-2272.patch
>
>
> Limited join functionality for Solr, mapping one set of IDs matching a query to another
set of IDs, based on the indexed tokens of the fields.
> Example:
> fq={!join  from=parent_ptr to:parent_id}child_doc:query

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