Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/14648#discussion_r75123948
--- Diff: sql/core/src/test/scala/org/apache/spark/sql/DatasetSuite.scala
---
@@ -878,6 +878,21 @@ class DatasetSuite extends QueryTest with
SharedSQLContext {
val ds = spark.createDataset(data)(enc)
checkDataset(ds, (("a", "b"), "c"), (null, "d"))
}
+
+ test("SPARK-16995: flat mapping on Dataset containing a column created
with lit/expr") {
+ val df = Seq("1").toDF("a")
+
+ import df.sparkSession.implicits._
+
+ assertResult(Seq()) {
--- End diff --
why not use `checkDataset`?
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