bozhang2820 opened a new pull request, #53799:
URL: https://github.com/apache/spark/pull/53799

   ### What changes were proposed in this pull request?
   For queries with multiple layers of executions (e.g., CTAS), this change is 
to perform shuffle dependency cleanup in child executions.
   
   The shuffle cleanup mode for child executions are determined based on the 
following order:
   1. Input arg when constructing this QueryExecution
   2. The cleanup mode of the root execution
   3. SQLConf from SparkSession
   
   ### Why are the changes needed?
   To make shuffle cleanup more effective.
   
   ### Does this PR introduce _any_ user-facing change?
   No
   
   ### How was this patch tested?
   Added a new unit test.
   
   ### Was this patch authored or co-authored using generative AI tooling?
   No


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