andygrove commented on issue #4199:
URL: 
https://github.com/apache/datafusion-comet/issues/4199#issuecomment-6218852488

   This no longer reproduces on `main`. apache/arrow-rs#9855 lets parquet-rs 
accept the `UNKNOWN` logical type on any physical type, and the parquet 59 
crate Comet uses includes it.
   
   I checked at c230bf4e98 on Spark 4.1.3. A read of a Spark-written file with 
a `NullType` column runs in the native scan when the query prunes that column, 
and falls back to Spark when the query reads it, and both match Spark. `issue 
#4136: struct with only NullType fields in file (SPARK-54220)` in 
`CometNativeReaderSuite` also passes with its `assume(false)` removed.
   
   #7052 drops the Spark 4.1 known-limitation entry for this from 
`spark-versions.md`. Two skips still point here and can go in a follow-up: that 
`assume(false)`, and the `IgnoreComet` on the SPARK-54220 test in 
`dev/diffs/4.1.3.diff` and `dev/diffs/4.2.0.diff`. Closing.
   


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