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From "Raghotham Murthy (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HIVE-313) add UDF date_add, date_sub, datediff
Date Thu, 12 Mar 2009 06:52:50 GMT

    [ https://issues.apache.org/jira/browse/HIVE-313?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12681185#action_12681185
] 

Raghotham Murthy commented on HIVE-313:
---------------------------------------

We should document the fact that we only do UTC now. Its probably not very intuitive to do
date arithmetic in UTC if people are thinking in their own timezones. I guess we should support
locales later (probably another jira).

Also, just checked the date_add spec in the URL specified above. It has a lot more functionality
than what you have implemented. Similar with date_sub. Maybe file jiras to make these functions
feature complete?

Btw, if you are confident that we dont have to add tests with table columns, I am fine by
having only constants.

+1 as long as you file those jiras and add documentation to the Hive Language Manual :)

> add UDF date_add, date_sub, datediff
> ------------------------------------
>
>                 Key: HIVE-313
>                 URL: https://issues.apache.org/jira/browse/HIVE-313
>             Project: Hadoop Hive
>          Issue Type: New Feature
>          Components: Query Processor
>            Reporter: Zheng Shao
>         Attachments: HIVE-313.1.patch, HIVE-313.2.patch
>
>
> See http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html#function_date-add
> See http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html#function_date-sub
> See http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html#function_datediff

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