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https://issues.apache.org/jira/browse/SPARK-12105?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16435308#comment-16435308
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Tomasz Gawęda commented on SPARK-12105:
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It can be used, but it should be so small change to the API, that it may be
done more user friendly in my opinion :)
> Add a DataFrame.show() with argument for output PrintStream
> -----------------------------------------------------------
>
> Key: SPARK-12105
> URL: https://issues.apache.org/jira/browse/SPARK-12105
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 1.5.2
> Reporter: Dean Wampler
> Priority: Minor
>
> It would be nice to send the output of DataFrame.show(...) to a different
> output stream than stdout, including just capturing the string itself. This
> is useful, e.g., for testing. Actually, it would be sufficient and perhaps
> better to just make DataFrame.showString a public method,
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