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Posted to issues@spark.apache.org by "Kent Yao (Jira)" <ji...@apache.org> on 2019/12/26 03:55:00 UTC

[jira] [Commented] (SPARK-28382) Array Functions: unnest

    [ https://issues.apache.org/jira/browse/SPARK-28382?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17003457#comment-17003457 ] 

Kent Yao commented on SPARK-28382:
----------------------------------

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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