[jira] [Updated] (SOLR-13720) Impossible to create effective ToParenBlockJoinQuery in custom QParser

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[jira] [Updated] (SOLR-13720) Impossible to create effective ToParenBlockJoinQuery in custom QParser

Hudson (Jira)

     [ https://issues.apache.org/jira/browse/SOLR-13720?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Stanislav Livotov updated SOLR-13720:
-------------------------------------
    Attachment: SOLR-13720.patch

> Impossible to create effective ToParenBlockJoinQuery in custom QParser
> ----------------------------------------------------------------------
>
>                 Key: SOLR-13720
>                 URL: https://issues.apache.org/jira/browse/SOLR-13720
>             Project: Solr
>          Issue Type: Bug
>      Security Level: Public(Default Security Level. Issues are Public)
>    Affects Versions: master (9.0)
>            Reporter: Stanislav Livotov
>            Priority: Major
>             Fix For: master (9.0)
>
>         Attachments: SOLR-13720.patch
>
>
> According to Solr [ducumentation|#SolrPlugins-QParserPlugin]  QParser is treated as a legal plugin.
>  
> However, it is impossible to create an effective ToParentBlockJoin query without copy-pasting(BitDocIdSetFilterWrapper class and getCachedFilter method from BlockJoinParentQParser) or dirty hacks(like creating org.apache.solr.search.join package with some accessor method to package-private methods in plugin code and adding it in WEB-INF/lib directory in order to be loaded by the same ClassLoader).
> I don't see a truly clean way how to fix it, but at least we can help custom plugin developers to create it a little bit easier by making BlockJoinParentQParser#getCachedFilter public and BlockJoinParentQParser#BitDocIdSetFilterWrapper and providing getter for BitDocIdSetFilterWrapper#filter. 
>  
>  
> In order to create 



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