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https://issues.apache.org/jira/browse/HIVE-14305?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15388806#comment-15388806
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Ryan Blue commented on HIVE-14305:
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You can test this by setting the server time zone to UTC and doing the same
test. If it works, then HIVE-12192 is an easy fix!
> 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
>
> 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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