andygrove opened a new issue, #2509:
URL: https://github.com/apache/datafusion-comet/issues/2509

   ### Describe the bug
   
   #2492 re-enabled the plan stability checks. I had to work around an issue 
with the expected plan for q9 on Spark 3.5 by manually editing the approved 
plan.
   
   There is a difference between the explain plan for q9 depending on whether 
`SPARK_GENERATE_GOLDEN_FILES` is specified.
   
   Generating new golden files for Spark 3.5 after #2492 is merged will always 
generate a different approved plan for q9.
   
   The difference is related to a `CometHashAggregateExec` and the output 
contains one of the following, depending on the value of 
`regenerateGoldenFiles`:
   
   ```
   count#34, sum#35, count#36, sum#37, count#38
   ```
   or
   
   ```
   count#34, sum#35, count#36, sum#15, count#37
   ```
   
   
   ### Steps to reproduce
   
   _No response_
   
   ### Expected behavior
   
   _No response_
   
   ### Additional context
   
   _No response_


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