Github user marmbrus commented on a diff in the pull request:
https://github.com/apache/spark/pull/3348#discussion_r22003211
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregates.scala
---
@@ -360,11 +360,11 @@ case class Sum(child: Expression) extends
PartialAggregate with trees.UnaryNode[
override def newInstance() = new SumFunction(child, this)
}
-case class SumDistinct(child: Expression)
- extends AggregateExpression with trees.UnaryNode[Expression] {
+case class SumDistinct(child: Expression)
--- End diff --
avoid trailing whitespace.
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