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https://issues.apache.org/jira/browse/HIVE-12194?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14961008#comment-14961008
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Ryan Blue commented on HIVE-12194:
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The main thing to fix is HIVE-12195 so that these operations don't appear to
work but return the wrong data. I think what we need to do for this one is
decide whether these common three-letter zone abbreviations should be supported
or left as-is.
> Daylight savings zones are not recognized (PDT, MDT)
> ----------------------------------------------------
>
> Key: HIVE-12194
> URL: https://issues.apache.org/jira/browse/HIVE-12194
> Project: Hive
> Issue Type: Sub-task
> Components: Hive
> Affects Versions: 1.1.1
> Reporter: Ryan Blue
>
> When I call the {{from_utc_timestamp}} function (or {{to_utc_timestamp}})
> using my current time zone, the result is incorrect:
> {code}
> // CURRENT SERVER TIME ZONE IS PDT
> hive> select to_utc_timestamp('2015-10-13 09:15:34.101', 'PDT');
> 2015-10-13 09:15:34.101 // NOT CHANGED!
> hive> select to_utc_timestamp('2015-10-13 09:15:34.101', 'PST');
> 2015-10-13 16:15:34.101 // CORRECT VALUE FOR PST
> {code}
> *UPDATE*: It appears that happens because the daylight savings zones are not
> recognized.
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