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From "Carl Steinbach (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-2803) utc_from_timestamp and utc_to_timestamp returns incorrect results.
Date Thu, 23 Feb 2012 02:31:48 GMT

    [ https://issues.apache.org/jira/browse/HIVE-2803?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13214221#comment-13214221
] 

Carl Steinbach commented on HIVE-2803:
--------------------------------------

@tamtam180: If this patch is ready for review can you please change the status to 'Patch Available'
and submit a review request using Phabricator? Instructions are located here:
https://cwiki.apache.org/confluence/display/Hive/HowToContribute#HowToContribute-ReviewProcess

Thanks!
                
> utc_from_timestamp and utc_to_timestamp returns incorrect results.
> ------------------------------------------------------------------
>
>                 Key: HIVE-2803
>                 URL: https://issues.apache.org/jira/browse/HIVE-2803
>             Project: Hive
>          Issue Type: Bug
>          Components: UDF
>    Affects Versions: 0.8.0
>            Reporter: tamtam180
>         Attachments: HIVE-2803.1.patch.txt
>
>
> How to reproduce:
> {noformat}
> $ echo "2011-12-25 09:00:00.123456" > /tmp/data5.txt
> hive> create table ts1(t1 timestamp);
> hive> load data local inpath '/tmp/data5.txt' overwrite into table ts1;
> hive> select t1, from_utc_timestamp(t1, 'JST'), from_utc_timestamp(t1, 'JST') from
ts1 limit 1;
> {noformat}
> The following result is expected:
> {noformat}
>  2011-12-25 09:00:00.123456      2011-12-25 18:00:00.123456      2011-12-25 18:00:00.123456
> {noformat}
> However, the above query return incorrect result like this:
> {noformat}
>  2011-12-26 03:00:00.492456      2011-12-26 03:00:00.492456      2011-12-26 03:00:00.492456
> {noformat}
> This is because GenericUDFFromUtcTimestamp.applyOffset() does setTime() improperly.
> On evaluating query, timestamp argument always returns the same instance.
> GenericUDFFromUtcTimestamp.applyOffset() does setTime() on the instance.
> That means it adds all offsets in the query.

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