[jira] [Resolved] (SPARK-47786) Make DISTINCT(*) a synonym for DISTINCT *

["Wenchen Fan (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SPARK-47786?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Wenchen Fan resolved SPARK-47786.
---------------------------------
    Fix Version/s: 4.0.0
       Resolution: Fixed

Issue resolved by pull request 45970
[https://github.com/apache/spark/pull/45970]

> Make DISTINCT(*) a synonym for DISTINCT * 
> ------------------------------------------
>
>                 Key: SPARK-47786
>                 URL: https://issues.apache.org/jira/browse/SPARK-47786
>             Project: Spark
>          Issue Type: Bug
>          Components: Spark Core
>    Affects Versions: 4.0.0
>            Reporter: Serge Rielau
>            Assignee: Serge Rielau
>            Priority: Major
>              Labels: pull-request-available
>             Fix For: 4.0.0
>
>
> We overshot when we removed the rule that ignored parens around star to instead produce a named structs.
> It turns out that there is a substantial set of users abusing thsi property do do DISTINCT(*) to mean DISTINCT *.
> Instead of rolling back the entire improvement, let's special case DISTINCT ( *)



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