[GitHub] [spark] HyukjinKwon edited a comment on pull request #35229: [SPARK-27442][SQL] Remove check field name when reading data in Parquet

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HyukjinKwon edited a comment on pull request #35229:
URL: https://github.com/apache/spark/pull/35229#issuecomment-1015113084


   Hey, we should at least disallow `.`, and should have a proper error message for Parquet specifically per PARQUET-1809 because it doesn't work with reading.
   
   Also, I think we should at least know how the files can be generated before merging this. How were these files created if they did not use Parquet I/O library to write?


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