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https://issues.apache.org/jira/browse/SPARK-29364?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Yuming Wang resolved SPARK-29364.
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Fix Version/s: 3.0.0
Resolution: Fixed
> Return intervals from date subtracts
> ------------------------------------
>
> Key: SPARK-29364
> URL: https://issues.apache.org/jira/browse/SPARK-29364
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 2.4.4
> Reporter: Maxim Gekk
> Assignee: Maxim Gekk
> Priority: Minor
> Fix For: 3.0.0
>
>
> According to the SQL standard, date1 - date2 is an interval. See
> http://www.contrib.andrew.cmu.edu/~shadow/sql/sql1992.txt at +_4.5.3
> Operations involving datetimes and intervals_+. The ticket aims to modify the
> DateDiff expression to produce another expression of the INTERVAL type When
> wspark.sql.ansi.enabled` is set to *true* and `spark.sql.dialect` is *Spark*.
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