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https://issues.apache.org/jira/browse/SPARK-27152?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16792248#comment-16792248
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Hyukjin Kwon commented on SPARK-27152:
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What does this matter?
> Column equality does not work for aliased columns.
> --------------------------------------------------
>
> Key: SPARK-27152
> URL: https://issues.apache.org/jira/browse/SPARK-27152
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 2.4.0
> Reporter: Ryan Radtke
> Priority: Major
>
> assert($"zip".as("zip_code") equals $"zip".as("zip_code")) will return false
> assert($"zip" equals $"zip") will return true.
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