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https://issues.apache.org/jira/browse/SPARK-34150?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17267137#comment-17267137
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Apache Spark commented on SPARK-34150:
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User 'ulysses-you' has created a pull request for this issue:
https://github.com/apache/spark/pull/31233
> Strip Null literal.sql in resolve alias
> ---------------------------------------
>
> Key: SPARK-34150
> URL: https://issues.apache.org/jira/browse/SPARK-34150
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 3.2.0
> Reporter: ulysses you
> Priority: Minor
>
> We will convert `Literal(null)` to target data type during analysis. Then the
> generated alias name will include something like `CAST(NULL AS String)`
> instead of `NULL`.
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