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Posted to issues@hive.apache.org by "Ryan Blue (JIRA)" <ji...@apache.org> on 2017/10/27 16:27:00 UTC
[jira] [Commented] (HIVE-14305) To/From UTC timestamp may return
incorrect result because of DST
[ https://issues.apache.org/jira/browse/HIVE-14305?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16222633#comment-16222633 ]
Ryan Blue commented on HIVE-14305:
----------------------------------
[~lirui], the behavior for those functions is already well established and works fine with the {{timestamp without time zone}} / {{timestamp}} type. I would be interested to hear your thoughts on implementing {{timestamp with time zone}}, but I don't think that we need that type to fix bugs.
> To/From UTC timestamp may return incorrect result because of DST
> ----------------------------------------------------------------
>
> Key: HIVE-14305
> URL: https://issues.apache.org/jira/browse/HIVE-14305
> Project: Hive
> Issue Type: Sub-task
> Reporter: Rui Li
> Assignee: Rui Li
> Labels: timestamp
>
> If the machine's local timezone involves DST, the UDFs return incorrect results.
> For example:
> {code}
> select to_utc_timestamp('2005-04-03 02:01:00','UTC');
> {code}
> returns {{2005-04-03 03:01:00}}. Correct result should be {{2005-04-03 02:01:00}}.
> {code}
> select to_utc_timestamp('2005-04-03 10:01:00','Asia/Shanghai');
> {code}
> returns {{2005-04-03 03:01:00}}. Correct result should be {{2005-04-03 02:01:00}}.
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