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https://issues.apache.org/jira/browse/SPARK-3683?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14187757#comment-14187757
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Cheng Lian commented on SPARK-3683:
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[~davies] I removed this special case for "NULL" because in this way we have no
way to represent the literal string {{"NULL"}}. Maybe I was wrong here,
validating Hive behavior in this case.
> PySpark Hive query generates "NULL" instead of None
> ---------------------------------------------------
>
> Key: SPARK-3683
> URL: https://issues.apache.org/jira/browse/SPARK-3683
> Project: Spark
> Issue Type: Bug
> Components: PySpark, SQL
> Affects Versions: 1.1.0
> Reporter: Tamas Jambor
> Assignee: Davies Liu
>
> When I run a Hive query in Spark SQL, I get the new Row object, where it does
> not convert Hive NULL into Python None instead it keeps it string 'NULL'.
> It's only an issue with String type, works with other types.
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