fix new test failure

Author: Davies Liu

sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/CatalystTypeConverters.scala

@@ -321,9 +321,9 @@ object CatalystTypeConverters {
       row: Row,
       schema: StructType,
       converters: Array[Any => Any]): Row = {
-    val ar = new Array[Any](row.size)
+    val ar = new Array[Any](converters.size)
     var idx = 0
-    while (idx < row.size) {
+    while (idx < converters.size && idx < row.size) {
       ar(idx) = converters(idx)(row(idx))
       idx += 1
     }

sql/core/src/main/scala/org/apache/spark/sql/execution/commands.scala

@@ -63,8 +63,8 @@ case class ExecutedCommand(cmd: RunnableCommand) extends SparkPlan {
   override def executeTake(limit: Int): Array[Row] = sideEffectResult.take(limit).toArray
 
   override def execute(): RDD[Row] = {
-    val converted = sideEffectResult.map(r => CatalystTypeConverters.convertToCatalyst(r, schema)
-      .asInstanceOf[Row])
+    val converted = sideEffectResult.map(r =>
+      CatalystTypeConverters.convertToCatalyst(r, schema).asInstanceOf[Row])
     sqlContext.sparkContext.parallelize(converted, 1)
   }
 }