Github user dongjoon-hyun commented on the issue:
https://github.com/apache/spark/pull/19571
To be clear, for [ORC File
Versions](https://github.com/apache/orc/blob/master/proto/orc_proto.proto#L240-L248),
there exists some ORC test case against version 0.11, but it's not our scope
because Spark (and Hive 1.2) uses `0.12 with HIVE_8732`.
There are 6 versions with 0.12.
0 = original
**1 = HIVE-8732 fixed (fixed stripe/file maximum statistics & string
statistics use utf8 for min/max)**
2 = HIVE-4243 fixed (use real column names from Hive tables)
3 = HIVE-12055 fixed (vectorized writer implementation)
4 = HIVE-13083 fixed (decimals write present stream correctly)
5 = ORC-101 fixed (bloom filters use utf8 consistently)
6 = ORC-135 fixed (timestamp statistics use utc)
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