Github user marmbrus commented on a diff in the pull request:
https://github.com/apache/spark/pull/5838#discussion_r29964329
--- Diff:
sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/optimizer/FilterPushdownSuite.scala
---
@@ -541,4 +541,21 @@ class FilterPushdownSuite extends PlanTest {
comparePlans(optimized, originalQuery)
}
+
+ test("push down project") {
--- End diff --
This name is very generic. `push project past sort` perhaps. please also
add a test where the push down would be invalid.
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