Shekharrajak commented on PR #2994:
URL: 
https://github.com/apache/datafusion-comet/pull/2994#issuecomment-4160573420

   Below tests assert on Spark-internal AQE optimization behavior (empty 
relation propagation, partition coalescing) that legitimately doesn't work when 
Comet's native operators are in the plan. IgnoreCometNativeDataFusion 
annotations skip these tests only in native_datafusion mode.
   
   SPARK-35442: Support propagate empty relation through aggregate
   SPARK-35442: Support propagate empty relation through union
   SPARK-34980: Support coalesce partition through union


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