Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/20670#discussion_r171182439
--- Diff:
sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/optimizer/InferFiltersFromConstraintsSuite.scala
---
@@ -192,4 +192,17 @@ class InferFiltersFromConstraintsSuite extends
PlanTest {
comparePlans(Optimize.execute(original.analyze), correct.analyze)
}
+
+ test("SPARK-23405:single left-semi join, filter out nulls on either side
on equi-join keys") {
--- End diff --
nit: `SPARK-23405: left-semi equa-join should filter out null join keys on
both sides`
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