weiwang19 opened a new pull request, #2046:
URL: https://github.com/apache/solr/pull/2046

   https://issues.apache.org/jira/browse/SOLR-17058
   
   # Description
   
   When distributed IDF is enabled in solr cloud by adding one of the cache 
implementations in solrconfig.xml 
https://solr.apache.org/guide/solr/latest/deployment-guide/solrcloud-distributed-requests.html#distributedidf,
  each solr query will incur a distributed shard request to get term 
statistics.  For queries that does not use distributed IDF information for 
scoring, the stats request is not necessary.  
   
   # Solution
   Hence I propose to add a disableDistribStats request param so that the 
distributed stats request can be disabled at query time. 
   
   1. disableDistribStats defaults to false. When the param is not present, 
there is no change to current distributed IDF behavior. 
   2. When explicitly set disableDistribStats=true, distributed stats call is 
disabled for the current query.   
   
   # Tests
   
   Added unit tests related to distrib IDF  and query result key. 
   
   # Checklist
   
   Please review the following and check all that apply:
   
   - [ X] I have reviewed the guidelines for [How to 
Contribute](https://wiki.apache.org/solr/HowToContribute) and my code conforms 
to the standards described there to the best of my ability.
   - [X ] I have created a Jira issue and added the issue ID to my pull request 
title.
   - [  ] I have given Solr maintainers 
[access](https://help.github.com/en/articles/allowing-changes-to-a-pull-request-branch-created-from-a-fork)
 to contribute to my PR branch. (optional but recommended)
   - [X] I have developed this patch against the `main` branch.
   - [X] I have run `./gradlew check`.
   - [X] I have added tests for my changes.
   - [ ] I have added documentation for the [Reference 
Guide](https://github.com/apache/solr/tree/main/solr/solr-ref-guide)
   


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