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https://issues.apache.org/jira/browse/SPARK-28382?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17003457#comment-17003457
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Kent Yao commented on SPARK-28382:
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Ping [~hyukjin.kwon] I closed my pull PR, but I'm not the creator of this
ticket. I'd leave this to you. thanks. FYI, the unnest implementation is based
on Postgres but the unnest seems different from systems to systems.
> Array Functions: unnest
> -----------------------
>
> Key: SPARK-28382
> URL: https://issues.apache.org/jira/browse/SPARK-28382
> Project: Spark
> Issue Type: Sub-task
> Components: SQL
> Affects Versions: 3.0.0
> Reporter: Yuming Wang
> Priority: Major
>
> ||Function||Return Type||Description||Example||Result||
> |{{unnest}}({{anyarray}})|set of anyelement|expand an array to a set of
> rows|unnest(ARRAY[1,2])|1
> 2
> (2 rows)|
>
> https://www.postgresql.org/docs/11/functions-array.html
>
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