sreemanamala opened a new pull request, #16231:
URL: https://github.com/apache/druid/pull/16231

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   ### Description
   
   This PR aims to handle the following cases in window frame selection
   
   `rows between unbounded preceding and x preceding
   rows between x following and unbounded following 
   rows between x preceding and y preceding
   rows between x following and y following`
   
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   <hr>
   
   ##### Key changed/added classes in this PR
    * `DefaultFramedOnHeapAggregatable.java`
    * `DruidSqlValidator.java`
    * `Windowing.java`
   
   <hr>
   
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   This PR has:
   
   - [ ] been self-reviewed.
      - [ ] using the [concurrency 
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   - [ ] added integration tests.
   - [ ] been tested in a test Druid cluster.
   


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