Github user cloud-fan commented on a diff in the pull request: https://github.com/apache/spark/pull/20545#discussion_r167764797 --- Diff: sql/catalyst/src/main/scala/org/apache/spark/sql/types/StructType.scala --- @@ -104,6 +104,13 @@ case class StructType(fields: Array[StructField]) extends DataType with Seq[Stru /** Returns all field names in an array. */ def fieldNames: Array[String] = fields.map(_.name) + /** + * Returns all field names in an array. This is an alias of `fieldNames`. + * + * @since 2.3.0 --- End diff -- +1
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