Github user maropu commented on a diff in the pull request: https://github.com/apache/spark/pull/21442#discussion_r191232017 --- Diff: sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/optimizer/OptimizeInSuite.scala --- @@ -191,4 +206,21 @@ class OptimizeInSuite extends PlanTest { comparePlans(optimized, correctAnswer) } + + test("OptimizedIn test: In empty list gets transformed to " + + "If(IsNotNull(v), FalseLiteral, Literal(null, BooleanType)) when value is nullable") { --- End diff -- nit: could you make the title simpler?
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