[SPARK-7274] [SQL] Create Column expression for array/struct creation.

Author: Reynold Xin <rxin@databricks.com>

Closes #5802 from rxin/SPARK-7274 and squashes the following commits:

19aecaa [Reynold Xin] Fixed unicode tests.
bfc1538 [Reynold Xin] Export all Python functions.
2517b8c [Reynold Xin] Code review.
23da335 [Reynold Xin] Fixed Python bug.
132002e [Reynold Xin] Fixed tests.
56fce26 [Reynold Xin] Added Python support.
b0d591a [Reynold Xin] Fixed debug error.
86926a6 [Reynold Xin] Added test suite.
7dbb9ab [Reynold Xin] Ok one more.
470e2f5 [Reynold Xin] One more MLlib ...
e2d14f0 [Reynold Xin] [SPARK-7274][SQL] Create Column expression for array/struct creation.

1 files changed, 9 insertions, 1 deletions

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/BoundAttribute.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/BoundAttribute.scala
index 2225621dba..c6217f07c4 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/BoundAttribute.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/BoundAttribute.scala
@@ -28,13 +28,21 @@ import org.apache.spark.sql.catalyst.trees
  * the layout of intermediate tuples, BindReferences should be run after all such transformations.
  */
 case class BoundReference(ordinal: Int, dataType: DataType, nullable: Boolean)
-  extends Expression with trees.LeafNode[Expression] {
+  extends NamedExpression with trees.LeafNode[Expression] {
 
   type EvaluatedType = Any
 
   override def toString: String = s"input[$ordinal]"
 
   override def eval(input: Row): Any = input(ordinal)
+
+  override def name: String = s"i[$ordinal]"
+
+  override def toAttribute: Attribute = throw new UnsupportedOperationException
+
+  override def qualifiers: Seq[String] = throw new UnsupportedOperationException
+
+  override def exprId: ExprId = throw new UnsupportedOperationException
 }
 
 object BindReferences extends Logging {