Hello,
I would like rename a column after aggregation. In the following code, the
column name is "SUM(_1#179)", is there a way to rename it to a more
friendly name?
scala> val d = sqlContext.createDataFrame(Seq((1, 2), (1, 3), (2, 10)))
scala> d.groupBy("_1").sum().printSchema
root
|-- _1: integer (nullable = false)
|-- SUM(_1#179): long (nullable = true)
|-- SUM(_2#180): long (nullable = true)
Thanks.
Justin
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