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https://issues.apache.org/jira/browse/HIVE-2019?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13634176#comment-13634176
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Zhuoluo (Clark) Yang commented on HIVE-2019:
--------------------------------------------

Actually, NOW() is not a non-deterministic UDF like rand(), for every time you 
call it, it returns different answers. Is HIVE-746 a related JIRA issue?
                
> Implement NOW() UDF
> -------------------
>
>                 Key: HIVE-2019
>                 URL: https://issues.apache.org/jira/browse/HIVE-2019
>             Project: Hive
>          Issue Type: New Feature
>          Components: UDF
>            Reporter: Carl Steinbach
>            Assignee: Priyadarshini
>         Attachments: HIVE-2019.patch
>
>
> Reference: 
> http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html#function_now

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