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From "Takeshi Yamamuro (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SPARK-12105) Add a DataFrame.show() with argument for output PrintStream
Date Thu, 12 Apr 2018 06:59:00 GMT

    [ https://issues.apache.org/jira/browse/SPARK-12105?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16435019#comment-16435019
] 

Takeshi Yamamuro commented on SPARK-12105:
------------------------------------------

I feel it is enough to use Console?
{code}
val outputStream = new java.io.ByteArrayOutputStream()
val out = new java.io.PrintStream(outputStream, true);
Console.withOut(out) { Seq(1, 2, 3, 4).toDS.show() }
scala> outputStream.toString
res1: String =
"+-----+
|value|
+-----+
|    1|
|    2|
|    3|
|    4|
+-----+

"
{code}

> 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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