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https://issues.apache.org/jira/browse/SPARK-23928?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16476108#comment-16476108
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Marek Novotny commented on SPARK-23928:
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[~hzlu] Cool. (Re: Testing) Sounds good to me. It would be difficult to try to
test the randomness. Instead of that, I would refer to some well-known
algorithm (e.g. Fisher–Yates).
> High-order function: shuffle(x) → array
> ---------------------------------------
>
> Key: SPARK-23928
> URL: https://issues.apache.org/jira/browse/SPARK-23928
> Project: Spark
> Issue Type: Sub-task
> Components: SQL
> Affects Versions: 2.3.0
> Reporter: Xiao Li
> Priority: Major
>
> Ref: https://prestodb.io/docs/current/functions/array.html
> Generate a random permutation of the given array x.
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