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https://issues.apache.org/jira/browse/SPARK-5040?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14262413#comment-14262413
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Apache Spark commented on SPARK-5040:
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User 'rxin' has created a pull request for this issue:
https://github.com/apache/spark/pull/3862
> Support expressing unresolved attributes using $"attribute name" notation in
> SQL DSL
> ------------------------------------------------------------------------------------
>
> Key: SPARK-5040
> URL: https://issues.apache.org/jira/browse/SPARK-5040
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Reporter: Reynold Xin
> Assignee: Reynold Xin
>
> The SQL DSL uses Scala symbols to represent attributes, e.g. 'attr. Symbols,
> however, cannot capture attributes with spaces or uncommon characters. Here
> we suggest supporting $"attribute name" as an alternative.
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