Github user gatorsmile commented on a diff in the pull request:
https://github.com/apache/spark/pull/20832#discussion_r223164144
--- Diff: sql/core/src/main/scala/org/apache/spark/sql/Column.scala ---
@@ -1208,85 +1208,172 @@ class ColumnName(name: String) extends
Column(name) {
*/
def boolean: StructField = StructField(name, BooleanType)
+ /**
+ * Creates a new `StructField` of type boolean.
+ * @since 2.4.0
+ */
+ def boolean(nullable: Boolean): StructField = StructField(name,
BooleanType, nullable)
--- End diff --
The NULL hints are not enforced. Thus, it is kind of risky to expose this
to end users since it could generate a wrong result. We plan to ignore the
user-specified NULL hints in the upcoming release.
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