tree e7519f8580832d2e139bd5cb4b761c8a043d4c36
parent ab435daa89e3f958e89ed13d20b4a67e76686578
author Antoine Pitrou <antoine@python.org> 1617249264 -0700
committer Micah Kornfield <emkornfield@gmail.com> 1617249264 -0700

PARQUET-1990: [C++] Refuse to write ConvertedType::NA

ConvertedType::NA corresponds to an invalid converted type that was once added to the Parquet spec:
https://github.com/apache/parquet-format/pull/45
but then quickly removed in favour of the Null logical type:
https://github.com/apache/parquet-format/pull/51

Unfortunately, Parquet C++ could still in some cases emit the unofficial converted type.

Also remove the confusingly-named LogicalType::Unknown, while "UNKNOWN" in the Thrift specification points to LogicalType::Null.

Closes #9863 from pitrou/PARQUET-1990-invalid-converted-type

Authored-by: Antoine Pitrou <antoine@python.org>
Signed-off-by: Micah Kornfield <emkornfield@gmail.com>