Github user marmbrus commented on a diff in the pull request:
https://github.com/apache/spark/pull/10260#discussion_r47584808
--- Diff: sql/core/src/test/scala/org/apache/spark/sql/DatasetSuite.scala
---
@@ -481,10 +481,17 @@ class DatasetSuite extends QueryTest with
SharedSQLContext {
val ds = Seq(2 -> 2.toByte, 3 -> 3.toByte).toDF("a", "b").as[ClassData]
assert(ds.collect().toSeq == Seq(ClassData("2", 2), ClassData("3", 3)))
}
-}
+ test("verify mismatching field names fail with a good error") {
+ val ds = Seq(ClassData("a", 1)).toDS()
+ intercept[AnalysisException] {
--- End diff --
Check that the message has some key things in it? (variable names, types,
etc.)
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