Github user liancheng commented on the issue:
https://github.com/apache/spark/pull/16030
My hunch is that we somehow passed a wrong requested schema containing the
partition column down to the vectorized Parquet reader. IIRC, we prune
partition columns from the data schema when generating the requested schema for
the underlying reader since partition values are directly available in the
directory path, there's no need to read and decode them from the physical file.
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