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Sergey Shelukhin edited comment on HIVE-8746 at 3/13/15 5:59 PM: ----------------------------------------------------------------- +0, I think the reader should actually throw an exception if the file was written on a different machine. That will also elegantly solve all of our locality problems :) was (Author: sershe): +0, I think the reader should actually throw an exception if the file was written on a different machine. That will also elegantly solve all of our locality problems > ORC timestamp columns are sensitive to daylight savings time > ------------------------------------------------------------ > > Key: HIVE-8746 > URL: https://issues.apache.org/jira/browse/HIVE-8746 > Project: Hive > Issue Type: Bug > Reporter: Owen O'Malley > Assignee: Owen O'Malley > > Hive uses Java's Timestamp class to manipulate timestamp columns. > Unfortunately the textual parsing in Timestamp is done in local time and the > internal storage is in UTC. > ORC mostly side steps this issue by storing the difference between the time > and a base time also in local and storing that difference in the file. > Reading the file between timezones will mostly work correctly "2014-01-01 > 12:34:56" will read correctly in every timezone. > However, when moving between timezones with different daylight saving it > creates trouble. In particular, moving from a computer in PST to UTC will > read "2014-06-06 12:34:56" as "2014-06-06 11:34:56". -- This message was sent by Atlassian JIRA (v6.3.4#6332)