Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/6874#discussion_r32804286
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/complexTypes.scala
---
@@ -79,3 +78,42 @@ case class CreateStruct(children: Seq[Expression])
extends Expression {
InternalRow(children.map(_.eval(input)): _*)
}
}
+
+/**
+ * Creates a struct with the given field names and values
+ *
+ * @param children Seq(name1, val1, name2, val2, ...)
+ */
+case class CreateNamedStruct(children: Seq[Expression]) extends Expression
{
+ assert(children.size % 2 == 0, "NamedStruct expects an even number of
arguments.")
--- End diff --
yes, please use `checkInputTypes` here to check `children.size % 2 == 0`
and all name expressions are non-null literal string.
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