Github user clockfly commented on a diff in the pull request:
https://github.com/apache/spark/pull/14494#discussion_r73958911
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/typedaggregators.scala
---
@@ -27,7 +27,7 @@ import org.apache.spark.sql.expressions.Aggregator
////////////////////////////////////////////////////////////////////////////////////////////////////
-class TypedSumDouble[IN](f: IN => Double) extends Aggregator[IN, Double,
Double] {
+class TypedSumDouble[IN](val f: IN => Double) extends Aggregator[IN,
Double, Double] {
--- End diff --
TypedFilter and MapElements also exposes the function closure? With this,
we can apply the possible optimization describe in
https://issues.apache.org/jira/browse/SPARK-16898?
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