Github user gatorsmile commented on a diff in the pull request:
https://github.com/apache/spark/pull/10393#discussion_r48197749
--- Diff: sql/core/src/test/scala/org/apache/spark/sql/DatasetSuite.scala
---
@@ -317,6 +319,7 @@ class DatasetSuite extends QueryTest with
SharedSQLContext {
val ds = Seq(("a", 10), ("a", 20), ("b", 1), ("b", 2), ("c", 1)).toDS()
val grouped = ds.groupBy($"_1").keyAs[String]
val agged = grouped.mapGroups { case (g, iter) => (g,
iter.map(_._2).sum) }
+ assert(agged.queryExecution.executedPlan.missingInput.isEmpty)
--- End diff --
Just did that, and then realized more nodes need a fix. : )
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