parthchandra commented on PR #1320:
URL: 
https://github.com/apache/datafusion-comet/pull/1320#issuecomment-2608471213

   > @parthchandra E.g. for the utils file fromArrowType is defined in both 
files
   
   Oh, I get it now. We did duplicate code in the feature branch 
(CometArrowUtils and Utils both duplicate code from Spark. Let me clean this up 
in a followup)
   The cast.rs and parquet_support.rs duplication is intentional. We used the 
former as the starting point for parquet type conversions. The parquet_support 
code will change as we address more data types.
   
   
   > Another potential issue 
spark/src/test/scala/org/apache/spark/sql/comet/CometPlanStabilitySuite.scala](https://github.com/apache/datafusion-comet/blob/main/spark/src/test/scala/org/apache/spark/sql/comet/CometPlanStabilitySuite.scala#L349
 is testing only when the mode is SCAN_NATIVE_COMET?
   
   Yes. The plans are different when the scans are different. We generated new 
plans for the different scan types but did not turn them on. The two new scan 
implementations do not yet pass all the unit tests so turning on plan stability 
for them is a little premature
   


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