[jira] [Commented] (HIVE-5810) create a function ADDDATE as exists in mysql

["Anandha L Ranganathan (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HIVE-5810?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13820958#comment-13820958 ] 

Anandha L Ranganathan commented on HIVE-5810:
---------------------------------------------

The existing function    date_add  only able to add based on days.
 SELECTdae_add('2009-30-07', 1) FROM src LIMIT 1;\n"
    + "  '2009-31-07'")

Here is mysql example,
http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html#function_adddate.



> create a function ADDDATE   as exists in mysql 
> -----------------------------------------------
>
>                 Key: HIVE-5810
>                 URL: https://issues.apache.org/jira/browse/HIVE-5810
>             Project: Hive
>          Issue Type: Improvement
>            Reporter: Anandha L Ranganathan
>            Assignee: Anandha L Ranganathan
>   Original Estimate: 40h
>  Remaining Estimate: 40h
>
> MySQL has ADDDATE(date,INTERVAL expr unit).
> Similarly in Hive we can have  (date,unit,expr). 
> For example,
> ADDDATE('2013-11-09','DAY',2) will return 2013-11-11.
> ADDDATE('2013-11-09','Month',2) will return 2014-01-11.
> ADDDATE('2013-11-09','Year',2) will return 2014-11-11.
> Here Unit is DAY/Month/Year



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