Github user marmbrus commented on a diff in the pull request:
https://github.com/apache/spark/pull/9591#discussion_r44732712
--- Diff: sql/core/src/main/scala/org/apache/spark/sql/GroupedDataset.scala
---
@@ -137,8 +137,19 @@ class GroupedDataset[K, T] private[sql](
}
// To ensure valid overloading.
- protected def agg(expr: Column, exprs: Column*): DataFrame =
- groupedData.agg(expr, exprs: _*)
+ @scala.annotation.varargs
+ def agg(expr: Column, exprs: Column*): DataFrame =
--- End diff --
@rxin I think we need to expose this for the java users to work, while
still getting nice inference for scala
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