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https://issues.apache.org/jira/browse/HIVE-19370?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16479141#comment-16479141
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Bharathkrishna Guruvayoor Murali commented on HIVE-19370:
---------------------------------------------------------

Changed the add_months udf to accept an optional dateformat String.
See the review board link for more details.

Attaching the patch for running precommit tests.

> Issue: ADD Months function on timestamp datatype fields in hive
> ---------------------------------------------------------------
>
>                 Key: HIVE-19370
>                 URL: https://issues.apache.org/jira/browse/HIVE-19370
>             Project: Hive
>          Issue Type: Bug
>            Reporter: Amit Chauhan
>            Assignee: Bharathkrishna Guruvayoor Murali
>            Priority: Major
>         Attachments: HIVE-19370.01.patch, HIVE-19370.02.patch, 
> HIVE-19370.03.patch
>
>
> *Issue:*
> while using ADD_Months function on a timestamp datatype column the output 
> omits the time part[HH:MM:SS] part from output.
> which should not be the case.
> *query:* EMAIL_FAILURE_DTMZ is of datatype timestamp in hive.
> hive> select CUSTOMER_ID,EMAIL_FAILURE_DTMZ,ADD_MONTHS (EMAIL_FAILURE_DTMZ , 
> 1) from TABLE1 where CUSTOMER_ID=125674937;
> OK
> 125674937   2015-12-09 12:25:53     2016-01-09
> *hiver version :*
> hive> !hive --version;
>  Hive 1.2.1000.2.5.6.0-40
>  
> can you please help if somehow I can get below as output:
>  
> 125674937   2015-12-09 12:25:53           2016-01-09 12:25:53



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