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https://issues.apache.org/jira/browse/SPARK-51555?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17946648#comment-17946648
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Senthil Kumar commented on SPARK-51555:
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[~maxgekk] We do not have functions for MICROSECOND and MILLISECOND. So my
understanding is that we need to have separate functions for MILLISECOND and
MICROSECOND ,similar SPARK-51419, SPARK-51420, to before implementing
"timeDiff".
Please let me know if my understanding is correct
> Add the timediff() function
> ---------------------------
>
> Key: SPARK-51555
> URL: https://issues.apache.org/jira/browse/SPARK-51555
> Project: Spark
> Issue Type: Sub-task
> Components: SQL
> Affects Versions: 4.1.0
> Reporter: Max Gekk
> Priority: Major
>
> Add the timediff function which returns the difference between two times
> measured in units.
> h4. Syntax
> {code}
> timediff(unit, start, end)
> unit
> { MICROSECOND |
> MILLISECOND |
> SECOND |
> MINUTE |
> HOUR }
> {code}
> h4. Arguments
> * unit: A unit of measure.
> * start: A starting TIME expression.
> * end: An ending TIME expression.
> h4. Returns
> A INTEGER.
> If start is greater than end the result is negative.
> h4. Examples
> {code:sql}
> > SELECT timediff(HOUR, TIME'20:30:29', '21:30:28');
> 0
> > SELECT timediff(HOUR, TIME'20:30:29', '21:30:29');
> 1
> > SELECT timediff(HOUR, TIME'20:30:29', '12:00:00');
> -8
> {code}
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