Github user liancheng commented on a diff in the pull request:
https://github.com/apache/spark/pull/11427#discussion_r57002001
--- Diff:
sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/optimizer/CollapseProjectSuite.scala
---
@@ -95,4 +95,17 @@ class CollapseProjectSuite extends PlanTest {
comparePlans(optimized, correctAnswer)
}
+
+ test("collapse project into aggregate") {
+ val query = testRelation
+ .groupBy('a, 'b)(('a + 1).as('a_plus_1), 'b)
+ .select('a_plus_1, ('b + 1).as('b_plus_1))
+
+ val optimized = Optimize.execute(query.analyze)
+
+ val correctAnswer = testRelation
+ .groupBy('a, 'b)(('a + 1).as('a_plus_1), ('b +
1).as('b_plus_1)).analyze
+
+ comparePlans(optimized, correctAnswer)
+ }
--- End diff --
Would be nice to add one more test case that contains common
non-deterministic fields.
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