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https://issues.apache.org/jira/browse/HIVE-21576?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16833785#comment-16833785
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Shawn Weeks commented on HIVE-21576:
------------------------------------

Is there any plan to include fractional seconds. That seems to be consistently 
missing across all the time stamp functions. 

> Introduce CAST...FORMAT and limited list of SQL:2016 datetime formats
> ---------------------------------------------------------------------
>
>                 Key: HIVE-21576
>                 URL: https://issues.apache.org/jira/browse/HIVE-21576
>             Project: Hive
>          Issue Type: Improvement
>            Reporter: Karen Coppage
>            Assignee: Karen Coppage
>            Priority: Major
>         Attachments: HIVE-21576.01.patch
>
>
> Introduce FORMAT clause to CAST statements as well as the below limited list 
> of SQL:2016 datetime formats to Hive in general. These can be used if a 
> session-level feature flag is turned on.
>  * YYYY
>  * MM
>  * DD
>  * HH
>  * MI
>  * SS
> Definitions of these formats here: 
> [https://docs.google.com/document/d/1V7k6-lrPGW7_uhqM-FhKl3QsxwCRy69v2KIxPsGjc1k/|https://docs.google.com/document/d/1V7k6-lrPGW7_uhqM-FhKl3QsxwCRy69v2KIxPsGjc1k/edit]



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