Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/10156#discussion_r46766481
--- Diff: sql/core/src/test/scala/org/apache/spark/sql/DataFrameSuite.scala
---
@@ -1143,4 +1143,10 @@ class DataFrameSuite extends QueryTest with
SharedSQLContext {
val primitiveUDF = udf((i: Int) => i * 2)
checkAnswer(df.select(primitiveUDF($"age")), Row(44) :: Row(null) ::
Nil)
}
+
+ test("SPARK-12102: Ignore nullablity when comparing two sides of case") {
+ val df = sqlContext.sql(
--- End diff --
we should put tests in `catalyst` if possible, as they don't need to launch
a spark job and can run faster.
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