Github user maropu commented on the pull request:
https://github.com/apache/spark/pull/10896#issuecomment-179139867
Yes, it is. The input query is;
```
val fields = Seq(StringType, DoubleType, DoubleType)
.zipWithIndex.map { case (dataType, index) =>
StructField(s"col$index", dataType, true)
}
val df = sqlContext.createDataFrame(rdd, StructType(fields))
val df2 = df.repartition($"col0").cache
val df3 = df2.groupBy($"col0").agg(Map("col1"->"sum", "col2"->"avg"))
df3.explain(true)
```
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