Github user liancheng commented on a diff in the pull request:
https://github.com/apache/spark/pull/6686#discussion_r32122236
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/types/StructType.scala ---
@@ -104,6 +104,67 @@ case class StructType(fields: Array[StructField])
extends DataType with Seq[Stru
private lazy val nameToIndex: Map[String, Int] =
fieldNames.zipWithIndex.toMap
/**
+ * Creates a new [[StructType]] by adding a new field.
+ * {{{
+ * val struct = (new StructType)
+ * .add(StructField("a", IntegerType, true))
+ * .add(StructField("b", LongType, false))
+ * .add(StructField("c", StringType, true))
+ *}}}
+ */
+ def add(field: StructField): StructType = {
+ StructType(fields :+ field)
+ }
+
+ /**
+ * Creates a new [[StructType]] by adding a new field.
+ *
+ * val struct = (new StructType)
+ * .add(StructField("a", IntegerType, true))
+ * .add(StructField("b", LongType, false))
+ * .add(StructField("c", StringType, true))
+ */
+ def add(name: String, dataType: DataType): StructType = {
+ StructType(fields :+ new StructField(name, dataType, true,
Metadata.empty))
+ }
+
+ def add(name: String, dataType: DataType, nullable: Boolean): StructType
= {
+ StructType(fields :+ new StructField(name, dataType, nullable,
Metadata.empty))
+ }
+
+ def add(name: String,
+ dataType: DataType,
+ nullable: Boolean,
+ metadata: Metadata): StructType = {
--- End diff --
BTW, are we intentionally avoiding default argument values for Java API
friendliness here?
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