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https://issues.apache.org/jira/browse/HIVE-10399?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14505871#comment-14505871
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Aihua Xu commented on HIVE-10399:
---------------------------------

I don't think you need such UDF. You can just call "cast(123.123 as timestamp)" 
to convert a double to timestamp. Give it a try to see if it's what you want.

> from_unixtime_millis() Hive UDF
> -------------------------------
>
>                 Key: HIVE-10399
>                 URL: https://issues.apache.org/jira/browse/HIVE-10399
>             Project: Hive
>          Issue Type: New Feature
>          Components: UDF
>         Environment: HDP 2.2
>            Reporter: Hari Sekhon
>            Priority: Minor
>
> Feature request for a
> {code}from_unixtime_millis(){code}
> Hive UDF - from_unixtime() accepts only secs since epoch, and right now the 
> solution is to create a custom UDF, but this seems like quite a standard 
> thing to support millisecond precision dates in Hive natively.
> Hari Sekhon
> http://www.linkedin.com/in/harisekhon



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