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https://issues.apache.org/jira/browse/SPARK-32258?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17156939#comment-17156939
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Apache Spark commented on SPARK-32258:
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User 'viirya' has created a pull request for this issue:
https://github.com/apache/spark/pull/29091

> NormalizeFloatingNumbers directly normalizes IF/CaseWhen/Coalesce child 
> expressions
> -----------------------------------------------------------------------------------
>
>                 Key: SPARK-32258
>                 URL: https://issues.apache.org/jira/browse/SPARK-32258
>             Project: Spark
>          Issue Type: Improvement
>          Components: SQL
>    Affects Versions: 3.1.0
>            Reporter: L. C. Hsieh
>            Assignee: L. C. Hsieh
>            Priority: Minor
>             Fix For: 3.1.0
>
>
> Currently NormalizeFloatingNumbers rule treats some expressions as black box 
> but we can optimize it a bit by normalizing directly the inner children 
> expressions.



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