Github user HyukjinKwon commented on a diff in the pull request:
https://github.com/apache/spark/pull/14957#discussion_r77561307
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/types/StructType.scala ---
@@ -259,8 +259,23 @@ case class StructType(fields: Array[StructField])
extends DataType with Seq[Stru
* @throws IllegalArgumentException if a field with the given name does
not exist
*/
def apply(name: String): StructField = {
- nameToField.getOrElse(name,
- throw new IllegalArgumentException(s"""Field "$name" does not
exist."""))
+ if (name.contains('.')) {
--- End diff --
IIUU, this will drop the support to access the field name containing `.`
(e.g. `"a.b"`) which can be accessed via `` "`a.b`" ``.
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