Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/17562#discussion_r110335441
--- Diff:
sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/optimizer/FilterPushdownSuite.scala
---
@@ -134,15 +134,20 @@ class FilterPushdownSuite extends PlanTest {
comparePlans(optimized, correctAnswer)
}
- test("nondeterministic: can't push down filter with nondeterministic
condition through project") {
--- End diff --
This test was wrong, actually we can push down nondeterministic filter
through project, as long as the project list is all deterministic.
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