[SPARK-5853][SQL] Schema support in Row.

Author: Reynold Xin <rxin@databricks.com>

Closes #4640 from rxin/SPARK-5853 and squashes the following commits:

9c6f569 [Reynold Xin] [SPARK-5853][SQL] Schema support in Row.

1 files changed, 6 insertions, 0 deletions

diff --git a/sql/core/src/test/scala/org/apache/spark/sql/DataFrameSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/DataFrameSuite.scala
index 524571d9cc..0da619def1 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/DataFrameSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/DataFrameSuite.scala
@@ -89,6 +89,12 @@ class DataFrameSuite extends QueryTest {
       testData.collect().toSeq)
   }
 
+  test("head and take") {
+    assert(testData.take(2) === testData.collect().take(2))
+    assert(testData.head(2) === testData.collect().take(2))
+    assert(testData.head(2).head.schema === testData.schema)
+  }
+
   test("self join") {
     val df1 = testData.select(testData("key")).as('df1)
     val df2 = testData.select(testData("key")).as('df2)