[jira] [Comment Edited] (HIVE-8746) ORC timestamp columns are sensitive to daylight savings time

["Sergey Shelukhin (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HIVE-8746?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14360814#comment-14360814 ] 

Sergey Shelukhin edited comment on HIVE-8746 at 3/13/15 5:59 PM:
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+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".



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