[jira] [Commented] (SPARK-38347) Nullability propagation in transformUpWithNewOutput

["Apache Spark (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SPARK-38347?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17498815#comment-17498815 ] 

Apache Spark commented on SPARK-38347:
--------------------------------------

User 'sigmod' has created a pull request for this issue:
https://github.com/apache/spark/pull/35677

> Nullability propagation in transformUpWithNewOutput
> ---------------------------------------------------
>
>                 Key: SPARK-38347
>                 URL: https://issues.apache.org/jira/browse/SPARK-38347
>             Project: Spark
>          Issue Type: Bug
>          Components: SQL
>    Affects Versions: 3.2.0
>            Reporter: Yingyi Bu
>            Priority: Major
>
> The nullability of a replaced attribute should be `a.nullable` instead of `b.nullable`:
> https://github.com/apache/spark/blob/master/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/QueryPlan.scala#L357
> The scenario is a left outer join where the RHS attributes are replaced bottom up.



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