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https://issues.apache.org/jira/browse/HIVE-12706?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15068745#comment-15068745
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Ashutosh Chauhan commented on HIVE-12706:
-----------------------------------------
>From bug description, it seems problem is also for to_ts() but changes are
>only in from_ts() Do those changes cover both cases?
> 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
> 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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