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https://issues.apache.org/jira/browse/SOLR-9217?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15852031#comment-15852031
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Mikhail Khludnev commented on SOLR-9217:
----------------------------------------

Hello, 
[~shanky_ty], you are welcome, just look at 
https://wiki.apache.org/solr/HowToContribute .
I've checked that the description is still valid and describes where to start 
well.   

> {!join score=..}.. should delay join to createWeight
> ----------------------------------------------------
>
>                 Key: SOLR-9217
>                 URL: https://issues.apache.org/jira/browse/SOLR-9217
>             Project: Solr
>          Issue Type: Improvement
>          Components: query parsers
>    Affects Versions: 6.1
>            Reporter: Mikhail Khludnev
>            Priority: Minor
>              Labels: newbie, newdev
>
> {{ScoreJoinQParserPlugin.XxxCoreJoinQuery}} executes 
> {{JoinUtil.createJoinQuery}} on {{rewrite()}}, but it makes less effective in 
> {{filter(...)}} syntax. It's better to do that in {{createWeigh()}} as it's 
> done in classic Solr {{JoinQuery}}.
> All existing tests is enough, we just need to assert rewrite behavior - it 
> should rewrite on enclosing range query or so, and doesn't on plain term 
> query.  



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