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https://issues.apache.org/jira/browse/SPARK-9392?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14875809#comment-14875809
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Apache Spark commented on SPARK-9392:
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User 'yanboliang' has created a pull request for this issue:
https://github.com/apache/spark/pull/8821
> Dataframe drop should work on unresolved columns
> ------------------------------------------------
>
> Key: SPARK-9392
> URL: https://issues.apache.org/jira/browse/SPARK-9392
> Project: Spark
> Issue Type: Sub-task
> Components: SQL
> Reporter: Michael Armbrust
> Priority: Critical
>
> i.e. I would expect `df.drop($"colName")` to work. Another example is the
> test case here:
> https://github.com/apache/spark/pull/6585/files#diff-5d2ebf4e9ca5a990136b276859769289R355
> which I would expect to not be a no-op.
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