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https://issues.apache.org/jira/browse/HIVE-12706?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16119452#comment-16119452
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Leela Krishna commented on HIVE-12706:
--------------------------------------

Will report this as new issue

> Incorrect output from from_utc_timestamp()/to_utc_timestamp when local 
> timezone has DST
> ---------------------------------------------------------------------------------------
>
>                 Key: HIVE-12706
>                 URL: https://issues.apache.org/jira/browse/HIVE-12706
>             Project: Hive
>          Issue Type: Bug
>          Components: UDF
>            Reporter: Jason Dere
>            Assignee: Jason Dere
>             Fix For: 2.0.0
>
>         Attachments: HIVE-12706.1.patch
>
>
> Getting wrong output with the local timezone set to PST (which has DST). I 
> don't think this happens when the local timezone does not observe DST.
> {noformat}
> select from_utc_timestamp('2015-03-28 17:00:00', 'Europe/London')
> 2015-03-28 17:00:00
> select from_utc_timestamp('2015-03-28 18:00:00', 'Europe/London')
> 2015-03-28 19:00:00  <= Wrong, should be 2015-03-28 18:00:00
> select from_utc_timestamp('2015-03-28 19:00:00', 'Europe/London')
> 2015-03-28 20:00:00 <= Wrong, should be 2015-03-28 19:00:00
> {noformat}
> Also to_utc_timestamp():
> {noformat}
> select to_utc_timestamp('2015-03-28 17:00:00', 'Europe/London')
> 2015-03-28 17:00:00
> select to_utc_timestamp('2015-03-28 18:00:00', 'Europe/London')
> 2015-03-28 17:00:00 <= Wrong
> select to_utc_timestamp('2015-03-28 19:00:00', 'Europe/London')
> 2015-03-28 18:00:00 <= Wrong
> select to_utc_timestamp('2015-03-28 20:00:00', 'Europe/London')
> 2015-03-28 19:00:00 <= Wrong
> {noformat}



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