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https://issues.apache.org/jira/browse/SPARK-22456?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16240269#comment-16240269
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Sean Owen commented on SPARK-22456:
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Does it exist in other SQL dialects? that's the reason most functions like this
exist in Spark. Beyond that, these sorts of things should be UDFs.
> Add new function dayofweek
> --------------------------
>
> Key: SPARK-22456
> URL: https://issues.apache.org/jira/browse/SPARK-22456
> Project: Spark
> Issue Type: New Feature
> Components: PySpark, SQL
> Affects Versions: 2.2.0
> Reporter: Michael Styles
>
> Add new function *dayofweek* to return the day of the week of the given
> argument as an integer value in the range 1-7, where 1 represents Sunday.
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