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https://issues.apache.org/jira/browse/HIVE-20012?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16532063#comment-16532063
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Bharathkrishna Guruvayoor Murali commented on HIVE-20012:
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Hi,
I can take a look at this. Do you mind me assigning this JIRA to myself?
> Implement SQL Standard Date and Timestamp Functions
> ---------------------------------------------------
>
> Key: HIVE-20012
> URL: https://issues.apache.org/jira/browse/HIVE-20012
> Project: Hive
> Issue Type: New Feature
> Reporter: Shawn Weeks
> Priority: Minor
>
> I've looked around and haven't seen an existing ticket on this. Many times
> you need to convert from arbitrary string formats to a date or a timestamp.
> The current method using the unix_timestamp function doesn't support
> milliseconds and is a bit clunky. I propose we implement a to_date and
> to_timestamp function that behave like the following. It may also be useful
> for the to_timestamp function to behave like the existing to_date function
> and convert Hive's default timestamp string into an actual timestamp.
> {code:java}
> select to_date('01-01-2000','dd-MM-yyyy');
> 2000-01-01
> select to_timestamp('01-01-2000 13:00:00.000','dd-MM-yyyy HH:mm:ss.SSS')
> 2000-01-01 13:00:00.000{code}
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