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https://issues.apache.org/jira/browse/SPARK-12003?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15027968#comment-15027968
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Apache Spark commented on SPARK-12003:
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User 'davies' has created a pull request for this issue:
https://github.com/apache/spark/pull/9984
> Expanded star should use field name as column name
> ---------------------------------------------------
>
> Key: SPARK-12003
> URL: https://issues.apache.org/jira/browse/SPARK-12003
> Project: Spark
> Issue Type: Bug
> Reporter: Davies Liu
>
> Right now, the expended start will include the name of expression as prefix
> for column, that's not better than without expending, we should not have the
> prefix.
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