[ 
https://issues.apache.org/jira/browse/SOLR-6234?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Mikhail Khludnev updated SOLR-6234:
-----------------------------------
    Attachment: SOLR-6234.patch

ok! here we are:
* qparser is called from the older one (JoinQParserPlugin) by specifying score 
local param \{join score=...}
* b= is removed in favor of SOLR-7814
* multiVals was just removed too, it seems docvalues hide multivalued when 
singlevalued is requested
[want to 
watch?|https://github.com/m-khl/lucene-solr/commit/468a60e7ef6ce420482910a7675d7948c8561ef2
 ]

> Scoring modes for query time join 
> ----------------------------------
>
>                 Key: SOLR-6234
>                 URL: https://issues.apache.org/jira/browse/SOLR-6234
>             Project: Solr
>          Issue Type: New Feature
>          Components: query parsers
>    Affects Versions: 5.3
>            Reporter: Mikhail Khludnev
>            Assignee: Timothy Potter
>              Labels: features, patch, test
>             Fix For: 5.3
>
>         Attachments: SOLR-6234.patch, SOLR-6234.patch, SOLR-6234.patch, 
> SOLR-6234.patch, otherHandler.patch
>
>
> it adds {{scorejoin}} query parser which calls Lucene's JoinUtil underneath. 
> It supports:
> - {{score=none|avg|max|total}} local param (passed as ScoreMode to JoinUtil)
>  - {{score=none}} is *default*, eg if you *omit* this localparam 
> - supports {{b=100}} param to pass {{Query.setBoost()}}.
> - {{multiVals=true|false}} is introduced 
> - there is a test coverage for cross core join case. 
> - so far it joins string and multivalue string fields (Sorted, SortedSet, 
> Binary), but not Numerics DVs. follow-up LUCENE-5868  
> -there was a bug in cross core join, however there is a workaround for it- 
> it's fixed in Dec'14 patch.
> Note: the development of this patch was sponsored by an anonymous contributor 
> and approved for release under Apache License.



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