Github user liancheng commented on the issue:
https://github.com/apache/spark/pull/14272
This LGTM. Although it's a little bit hacky since technically the fields in
requested schema passed to the Parquet record reader may have different
original types (`INT_8` and `INT_16`) from the actual ones defined in the
physical file, fortunately Parquet record reader doesn't check for original
types.
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