Github user dilipbiswal commented on a diff in the pull request:
https://github.com/apache/spark/pull/13483#discussion_r65657150
--- Diff:
sql/core/src/test/scala/org/apache/spark/sql/DatasetAggregatorSuite.scala ---
@@ -224,6 +224,26 @@ class DatasetAggregatorSuite extends QueryTest with
SharedSQLContext {
checkAnswer(df.groupBy($"j").agg(RowAgg.toColumn), Row("a", 1) ::
Row("b", 5) :: Nil)
}
+ test("SPARK-15688: Remove redundant expressions from aggregate") {
+ val df = Seq(1 -> "a", 2 -> "b", 3 -> "b").toDF("col1", "col2")
--- End diff --
@gatorsmile Ah.. good idea. I will make the change. Thanks :-)
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