thinkharderdev commented on issue #2292:
URL: 
https://github.com/apache/arrow-datafusion/issues/2292#issuecomment-1105155180

   > * The ParquetExec, etc... needs to provide a schema at plan time
   > * It needs to yield batches that match this schema
   > * Depending on the catalog, the individual files might not match this 
schema, but must be compatible with it
   
   Yeah, exactly


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