Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/20545#discussion_r167764844
--- Diff:
sql/catalyst/src/test/scala/org/apache/spark/sql/types/DataTypeSuite.scala ---
@@ -134,6 +134,15 @@ class DataTypeSuite extends SparkFunSuite {
assert(mapped === expected)
}
+ test("fieldNames and names returns field names") {
+ val struct = StructType(
+ StructField("a", LongType) :: StructField("b", FloatType) :: Nil)
+
+ assert(struct.fieldNames === Seq("a", "b"))
+ assert(struct.names === Seq("a", "b"))
+ assert(struct.fieldNames === struct.names)
--- End diff --
this line is redundant.
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