Github user liancheng commented on the pull request:
https://github.com/apache/spark/pull/7048#issuecomment-115984726
Thanks for fixing this! `ENUM` is not specified in the Parquet format spec,
but according to parquet-mr 1.7.0, it is only used for converting Avro,
ProtoBuf, and Thrift files. Double checked that in all cases `ENUM` is mapped
to UTF8 string. So I think it's OK to always map `ENUM` to `StringType`
regardless the value of `assumeBinaryIsString`.
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