Rebase updates.

Author: viirya

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

@@ -395,13 +395,10 @@ object ScalaReflection extends ScalaReflection {
       val externalDataType = dataTypeFor(elementType)
       val Schema(catalystType, nullable) = silentSchemaFor(elementType)
       if (isNativeType(externalDataType)) {
-        expressions.If(
-          IsNull(input),
-          expressions.Literal.create(null, ArrayType(catalystType, nullable)),
-          NewInstance(
-            classOf[GenericArrayData],
-            input :: Nil,
-            dataType = ArrayType(catalystType, nullable)))
+        NewInstance(
+          classOf[GenericArrayData],
+          input :: Nil,
+          dataType = ArrayType(catalystType, nullable))
       } else {
         val clsName = getClassNameFromType(elementType)
         val newPath = s"""- array element class: "$clsName"""" +: walkedTypePath

sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/RowEncoder.scala

@@ -92,7 +92,6 @@ object RowEncoder {
         NewInstance(
           classOf[GenericArrayData],
           inputObject :: Nil,
-          propagateNull = true,
           dataType = t)
       case _ => MapObjects(extractorsFor(_, et), inputObject, externalDataTypeFor(et))
     }
@@ -115,7 +114,6 @@ object RowEncoder {
       NewInstance(
         classOf[ArrayBasedMapData],
         convertedKeys :: convertedValues :: Nil,
-        propagateNull = true,
         dataType = t)
 
     case StructType(fields) =>