Github user wgtmac commented on the issue:
https://github.com/apache/orc/pull/249
AFAIK, I don't think ORC has any issue in HIVE-12192. What ORC guarantees
is that we should always get same wall clock time representation w/o timezone.
Current Java implementation leverages java.sql.Timestamp which uses local
timezone and that's why writer and reader always use timestamp values in local
timezone. Unless we add a new TimestampColumnVector which enforces UTC timezone
to adopt your change here.---
