cloud-fan commented on code in PR #36530:
URL: https://github.com/apache/spark/pull/36530#discussion_r873577805
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sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/optimizer/OuterJoinEliminationSuite.scala:
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@@ -268,4 +268,59 @@ class OuterJoinEliminationSuite extends PlanTest {
comparePlans(optimized, originalQuery.analyze)
}
+
+ test("SPARK-39172: Remove left outer join if only left-side columns being
selected and " +
Review Comment:
Remove left outer join if only left-side columns are selected and the join
keys on the other side are unique.
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