jinhai-cloud commented on code in PR #29053:
URL: https://github.com/apache/spark/pull/29053#discussion_r1288502050
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sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/optimizer/PropagateEmptyRelationSuite.scala:
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@@ -67,6 +68,28 @@ class PropagateEmptyRelationSuite extends PlanTest {
comparePlans(optimized, correctAnswer)
}
+ test("SPARK-32241: remove empty relation children from Union") {
Review Comment:
This test case does not apply the UpdateAttributeNullability rules in
Optimizer. Do you need to add a test case?
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