Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/19156#discussion_r149641764
--- Diff: mllib/src/main/scala/org/apache/spark/ml/stat/Summarizer.scala ---
@@ -527,27 +570,28 @@ private[ml] object SummaryBuilderImpl extends Logging
{
weightExpr: Expression,
mutableAggBufferOffset: Int,
inputAggBufferOffset: Int)
- extends TypedImperativeAggregate[SummarizerBuffer] {
+ extends TypedImperativeAggregate[SummarizerBuffer] with
ImplicitCastInputTypes {
- override def eval(state: SummarizerBuffer): InternalRow = {
+ override def eval(state: SummarizerBuffer): Any = {
--- End diff --
why change the return type?
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