[SQL] Construct the MutableRow from an Array

Author: Cheng Hao <hao.cheng@intel.com>

Closes #3217 from chenghao-intel/mutablerow and squashes the following commits:

e8a10bd [Cheng Hao] revert the change of Row object
4681aea [Cheng Hao] Add toMutableRow method in object Row
a751838 [Cheng Hao] Construct the MutableRow from an existed row

(cherry picked from commit 69e858cc7748b6babadd0cbe20e65f3982161cbf)
Signed-off-by: Michael Armbrust <michael@databricks.com>

1 files changed, 4 insertions, 2 deletions

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/Row.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/Row.scala
index d00ec39774..463f3667fc 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/Row.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/Row.scala
@@ -215,9 +215,11 @@ class GenericRow(protected[sql] val values: Array[Any]) extends Row {
   def copy() = this
 }
 
-class GenericMutableRow(size: Int) extends GenericRow(size) with MutableRow {
+class GenericMutableRow(v: Array[Any]) extends GenericRow(v) with MutableRow {
   /** No-arg constructor for serialization. */
-  def this() = this(0)
+  def this() = this(null)
+
+  def this(size: Int) = this(new Array[Any](size))
 
   override def setBoolean(ordinal: Int, value: Boolean): Unit = { values(ordinal) = value }
   override def setByte(ordinal: Int, value: Byte): Unit = { values(ordinal) = value }