[jira] [Updated] (SPARK-38284) Add the TIMESTAMPDIFF() function

["Max Gekk (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SPARK-38284?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Max Gekk updated SPARK-38284:
-----------------------------
    Epic Link: SPARK-38783

> Add the TIMESTAMPDIFF() function
> --------------------------------
>
>                 Key: SPARK-38284
>                 URL: https://issues.apache.org/jira/browse/SPARK-38284
>             Project: Spark
>          Issue Type: New Feature
>          Components: SQL
>    Affects Versions: 3.3.0
>            Reporter: Max Gekk
>            Assignee: Max Gekk
>            Priority: Major
>             Fix For: 3.3.0
>
>
> Two functions that are part of the ODBC api and implemented virtually by ALL other databases are missing in Spark SQL.
> TIMESTAMPADD() and TIMESTAMPDIFF()
> See
> * [Time, Date, and Interval Functions|https://docs.microsoft.com/en-us/sql/odbc/reference/appendixes/time-date-and-interval-functions?view=sql-server-ver15]
> * [TIMESTAMPDIFF function (ODBC compatible)|https://docs.faircom.com/doc/sqlref/33477.htm]
> The TIMESTAMPDIFF() function is also VERY convenient and would be a great addition because getting the difference between two timestamps in seconds in spark today requires converting to unixtimestamp and back.
> {code:sql}
> SELECT TIMESTAMPDIFF(SECOND, '2021-12-30 01:02:00':timestamp,  '2021-12-30 01:00:00':timestamp)
> >120
> -- Current Support
> SELECT unix_timestamp('2021-12-30 01:00:00':timestamp) - unix_timestamp('2021-12-30 01:00:00':timestamp)
> > 120
> {code}



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