[jira] [Commented] (SPARK-17849) grouping set throws NPE

["Apache Spark (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SPARK-17849?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15561546#comment-15561546 ] 

Apache Spark commented on SPARK-17849:
--------------------------------------

User 'yangw1234' has created a pull request for this issue:
https://github.com/apache/spark/pull/15416

> grouping set throws NPE
> -----------------------
>
>                 Key: SPARK-17849
>                 URL: https://issues.apache.org/jira/browse/SPARK-17849
>             Project: Spark
>          Issue Type: Bug
>          Components: SQL
>    Affects Versions: 2.0.0, 2.0.1
>            Reporter: Yang Wang
>
> spark sql grouping sets throws NullPointerException.
> This problem can be recreated using the following lines of code:
> case class point(a:String, b:String, c:String)
> val data = Seq(
>   point("1","2","3"),
>   point("4","5","6"),
>   point("7","8","9")
> )
> sc.parallelize(data).toDF().registerTempTable("table")
> spark.sql("select a, b, count(c) from table group by a, b GROUPING SETS (()) ").show()



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