Github user mgaido91 commented on a diff in the pull request:
https://github.com/apache/spark/pull/20174#discussion_r160772523
--- Diff:
sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/optimizer/ReplaceOperatorSuite.scala
---
@@ -198,6 +198,20 @@ class ReplaceOperatorSuite extends PlanTest {
comparePlans(optimized, correctAnswer)
}
+ test("add one grouping key if necessary when replace Deduplicate with
Aggregate") {
+ val input = LocalRelation()
+ val query = Deduplicate(Seq.empty, input) // dropDuplicates()
+ val optimized = Optimize.execute(query.analyze)
+
+ val correctAnswer =
--- End diff --
nit: this can be all in one line
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