Github user gatorsmile commented on a diff in the pull request:
https://github.com/apache/spark/pull/13860#discussion_r68491125
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/types/StructField.scala ---
@@ -51,4 +51,35 @@ case class StructField(
("nullable" -> nullable) ~
("metadata" -> metadata.jsonValue)
}
+
+ /**
+ * Updates the StructField with a new comment value.
+ */
+ def withComment(comment: String): StructField = {
+ val newMetadata = new MetadataBuilder()
+ .withMetadata(metadata)
+ .putString("comment", comment)
+ .build()
+ copy(metadata = newMetadata)
+ }
+
+ /**
+ * Return the comment of this StructField.
+ */
+ def getComment(): Option[String] = {
+ if (metadata.contains("comment"))
Option(metadata.getString("comment")) else None
+ }
+}
+
+object StructField {
+ def apply(
--- End diff --
uh, I see what you want. Let me change it.
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