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https://issues.apache.org/jira/browse/KYLIN-5691?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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liyang closed KYLIN-5691.
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> Kylin5 datediff function supports cases where the parameter is a string.
> ------------------------------------------------------------------------
>
> Key: KYLIN-5691
> URL: https://issues.apache.org/jira/browse/KYLIN-5691
> Project: Kylin
> Issue Type: Improvement
> Components: Query Engine
> Affects Versions: 5.0-beta
> Reporter: Yaguang Jia
> Assignee: Yaguang Jia
> Priority: Minor
> Fix For: 5.0.0
>
>
> h2. Design
> Previously datediff only supported calls where both parameters were of type
> date, such as select datediff(date'2023-05-01', date'2023-05-02')
> Now it has been extended to also support date strings where both arguments
> are in ''yyyy-MM-dd'' format, such as select datediff('2023-05-01',
> '2023-05-02' )
>
> ----
>
> 之前datediff只支持两个参数都为date类型的调用，如 select datediff(date'2023-05-01',
> date'2023-05-02')
> 现在做了扩展，也可以支持两个参数都为‘‘yyyy-MM-dd’’格式的日期字符串，如select datediff('2023-05-01',
> '2023-05-02')
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