Github user liancheng commented on a diff in the pull request:
https://github.com/apache/spark/pull/10812#discussion_r50053202
--- Diff: sql/core/src/test/scala/org/apache/spark/sql/DataFrameSuite.scala
---
@@ -337,6 +337,27 @@ class DataFrameSuite extends QueryTest with
SharedSQLContext {
checkAnswer(lowerCaseData.intersect(upperCaseData), Nil)
}
+ test("intersect - nullability") {
--- End diff --
I think it's probably OK since we can also `checkAnswer` here to verify the
query result.
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