[WIP] NO PRECOMMIT TESTS
This patch enables Hive to start writing int64 timestamps in Parquet.
With Parquet version 1.11, a new timestamp LogicalType with base INT64 and the following metadata is introduced:
boolean isAdjustedToUtc: marks whether the timestamp is converted to UTC (aka Instant semantics) or not (LocalDateTime semantics)
enum TimeUnit (NANOS, MICROS, MILLIS): granularity of timestamp
The timestamp will have LocalDateTime semantics (not converted to UTC).
Timestamps outside of range 1677-09-21 00:12:43.145224192 – 2262-04-11 23:47:16.854775807 cannot be written in nanos and will be recorded as NULL.
Time unit (granularity) will be determined by the user. Default is milliseconds.