[jira] [Created] (LUCENE-8359) Extend ToParentBlockJoinQuery with 'minimum matched children' functionality

["Andrey Kudryavtsev (JIRA)" <ji...@apache.org>]

Andrey Kudryavtsev created LUCENE-8359:
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             Summary: Extend ToParentBlockJoinQuery with 'minimum matched children' functionality 
                 Key: LUCENE-8359
                 URL: https://issues.apache.org/jira/browse/LUCENE-8359
             Project: Lucene - Core
          Issue Type: New Feature
            Reporter: Andrey Kudryavtsev


I have a hierarchal data in index and requirements like 'match parent only if at least {{n}} his children were matched'.  

I used to solve it by combination of some lucene / solr tricks like 'frange' filtration by sum of matched children score, so it's doable out of the box with some efforts right now. But also it could be solved by \{{ToParentBlockJoinQuery}} extension with new numeric parameter, tried to do it in attached patch. 

Not sure if this should be in main branch, just put it here, maybe someone would have similar problems.



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