[jira] [Commented] (HIVE-19354) from_utc_timestamp returns incorrect results for datetime values with timezone

["Bharathkrishna Guruvayoor Murali (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HIVE-19354?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16459399#comment-16459399 ] 

Bharathkrishna Guruvayoor Murali commented on HIVE-19354:
---------------------------------------------------------

Hi,

Can I take a look at this one? Are you working on it

> from_utc_timestamp returns incorrect results for datetime values with timezone
> ------------------------------------------------------------------------------
>
>                 Key: HIVE-19354
>                 URL: https://issues.apache.org/jira/browse/HIVE-19354
>             Project: Hive
>          Issue Type: Bug
>          Components: Hive
>    Affects Versions: 3.1.0
>            Reporter: Bruce Robbins
>            Priority: Major
>
> On the master branch, from_utc_timestamp returns incorrect results for datetime strings that contain a timezone:
> {noformat}
> hive> select from_utc_timestamp('2000-10-10 00:00:00+00:00', 'America/Los_Angeles');
> OK
> 2000-10-09 10:00:00
> Time taken: 0.294 seconds, Fetched: 1 row(s)
> hive> select from_utc_timestamp('2000-10-10 00:00:00', 'America/Los_Angeles');
> OK
> 2000-10-09 17:00:00
> Time taken: 0.121 seconds, Fetched: 1 row(s)
> hive> 
> {noformat}
> Both inputs are 2000-10-10 00:00:00 in UTC time, but I got two different results.
> In version 2.3.3, from_utc_timestamp doesn't accept timezones in its input strings, so it does not have this bug:
> {noformat}
> hive> select from_utc_timestamp('2000-10-10 00:00:00+00:00', 'America/Los_Angeles');
> OK
> NULL
> Time taken: 5.152 seconds, Fetched: 1 row(s)
> hive> select from_utc_timestamp('2000-10-10 00:00:00', 'America/Los_Angeles');
> OK
> 2000-10-09 17:00:00
> Time taken: 0.069 seconds, Fetched: 1 row(s)
> hive> 
> {noformat}
> Since the function is expecting a UTC datetime value, it probably should continue to reject input that contains a timezone component.



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