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https://issues.apache.org/jira/browse/SPARK-56561?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18076128#comment-18076128
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Shrirang Mhalgi commented on SPARK-56561:
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I would like to work on this if no one is working :)
> document where array_distinct and similar functions preserve order
> ------------------------------------------------------------------
>
> Key: SPARK-56561
> URL: https://issues.apache.org/jira/browse/SPARK-56561
> Project: Spark
> Issue Type: Documentation
> Components: Documentation
> Affects Versions: 3.5.8, 4.1.1
> Reporter: Bill Schneider
> Priority: Major
>
> It would be good for reference documentation of SQL functions to explicitly
> say when functions like `array_distinct` will (and won't) preserve order.
> This would be useful to cite during code reviews, and may also help inform AI
> coding agents.
> This might also apply to `array_intersect`.
> I am thinking something like
> > Removes duplicate values from the array, preserving the ordering of the
> > first occurrence of each distinct value.
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