Github user gatorsmile commented on a diff in the pull request: https://github.com/apache/spark/pull/10630#discussion_r49048434 --- Diff: sql/core/src/test/scala/org/apache/spark/sql/DataFrameSuite.scala --- @@ -329,6 +329,14 @@ class DataFrameSuite extends QueryTest with SharedSQLContext { Row(3, "c") :: Row(4, "d") :: Nil) checkAnswer(lowerCaseData.intersect(upperCaseData), Nil) + + // check null equality --- End diff -- Thank you! Let me add the test case. It passes but we should still add this case!
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