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Posted to issues@spark.apache.org by "Wenchen Fan (JIRA)" <ji...@apache.org> on 2015/12/01 07:20:11 UTC

[jira] [Created] (SPARK-12068) use a single column in Dataset.groupBy and count will fail

Wenchen Fan created SPARK-12068:
-----------------------------------

             Summary: use a single column in Dataset.groupBy and count will fail
                 Key: SPARK-12068
                 URL: https://issues.apache.org/jira/browse/SPARK-12068
             Project: Spark
          Issue Type: Bug
          Components: SQL
            Reporter: Wenchen Fan


{code}
val ds = Seq("a" -> 1, "b" -> 1, "a" -> 2).toDS()
val count = ds.groupBy($"_1").count()
count.collect() // will fail
{code}



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