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https://issues.apache.org/jira/browse/FLINK-28929?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Xingbo Huang updated FLINK-28929:
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Fix Version/s: 1.17.0
(was: 1.16.0)
> Add built-in datediff function.
> -------------------------------
>
> Key: FLINK-28929
> URL: https://issues.apache.org/jira/browse/FLINK-28929
> Project: Flink
> Issue Type: Improvement
> Components: Table SQL / API
> Affects Versions: 1.16.0
> Reporter: jackylau
> Priority: Major
> Labels: pull-request-available
> Fix For: 1.17.0
>
>
> Syntax:
> {code:java}
> DATEDIFF(expr1,expr2){code}
> Returns:
> returns _{{expr1}}_ − _{{expr2}}_ expressed as a value in days from one date
> to the other. _{{expr1}}_ and _{{expr2}}_ are date or date-and-time
> expressions. Only the date parts of the values are used in the calculation.
> This function returns {{NULL}} if _{{expr1}}_ or _{{expr2}}_ is {{{}NULL{}}}.
> Examples:
> {code:java}
> > SELECT DATEDIFF('2007-12-31 23:59:59','2007-12-30');
> -> 1
> > SELECT DATEDIFF('2010-11-30 23:59:59','2010-12-31');
> -> -31{code}
> See more:
> * mysql:
> [https://dev.mysql.com/doc/refman/8.0/en/date-and-time-functions.html#function_datediff|https://dev.mysql.com/doc/refman/8.0/en/mathematical-functions.html#function_conv]
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