Github user liancheng commented on the pull request:
https://github.com/apache/spark/pull/9646#issuecomment-156322187
@marmbrus That's also an option, but seems somewhat confusing to me.
Especially, in this way `UINT_64` has to be mapped to a fractional type.
Besides, I just checked and realized that none of those built-in data models in
parquet-mr implements any of these unsigned logical types.
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