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

["Yang Wang (JIRA)" <ji...@apache.org>]

Yang Wang created SPARK-17849:
---------------------------------

             Summary: 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: 2.0.1, 2.0.0
            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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