[GitHub] [spark] cloud-fan commented on a change in pull request #30278: [SPARK-33302][SQL] Push down filters through Expand

[GitBox <gi...@apache.org>]

cloud-fan commented on a change in pull request #30278:
URL: https://github.com/apache/spark/pull/30278#discussion_r519625559



##########
File path: sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/optimizer/FilterPushdownSuite.scala
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@@ -1208,6 +1208,36 @@ class FilterPushdownSuite extends PlanTest {
       checkAnalysis = false)
   }
 
+
+  test("push down predicate through expand") {
+    val input = LocalRelation('a.int, 'b.string, 'c.double)
+    val query =
+      Aggregate(

Review comment:
       why does this test need an Aggregate?




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