Github user rxin commented on a diff in the pull request:
https://github.com/apache/spark/pull/6686#discussion_r31871281
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/types/StructType.scala ---
@@ -104,6 +104,34 @@ case class StructType(fields: Array[StructField])
extends DataType with Seq[Stru
private lazy val nameToIndex: Map[String, Int] =
fieldNames.zipWithIndex.toMap
/**
+ * Support construction of StructType with addition rather than
providing a list.
+ */
+ def add(field: StructField): StructType = {
+ StructType(fields :+ field)
+ }
+
+ /**
+ * Support construction of StructType with addition rather than
providing a list.
+ */
+ def add(name: String,
+ dataType: DataType,
+ nullable: Boolean = true,
+ metadata: Metadata = Metadata.empty): StructType = {
+ StructType(fields :+ new StructField(name, dataType, nullable,
metadata))
+ }
+
+ /**
+ * Support construction of StructType with addition rather than
providing a list.
--- End diff --
```
Creates a new [[StructType]] by adding a new field.
{{{
// give an example of how to use this here
}}}
```
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