gittihub-jpg commented on PR #4559:
URL:
https://github.com/apache/datafusion-comet/pull/4559#issuecomment-4616645455
Hi, thanks for feedback, somehow deleted the old tests?
added new test in CometCastSuite ("cast MapType to MapType").
To make sure the cast actually runs in Comet and isn't just done by Spark:
it writes a map<int,int> to Parquet, reads it back with
USE_V1_SOURCE_LIST=parquet so the map is read natively, then casts to
map<long,string> and checks with checkSparkAnswerAndOperator that the result
matches Spark and no fallback happens. Without this change the cast falls back,
so the test would fail.
Happy to add more key/value type combos if you want.
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