rename file and refresh getAs[T]

Author: adrian-wang

sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/SpecificRow.scala renamed to sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/SpecificMutableRow.scala

@@ -307,7 +307,14 @@ final class SpecificMutableRow(val values: Array[MutableValue]) extends MutableR
     values(i).asInstanceOf[MutableByte].value
   }
 
-  override def getAs[T](i: Int): T = {
-    values(i).asInstanceOf[MutableAny].value.asInstanceOf[T]
+  override def getAs[T](i: Int): T = values(i) match {
+    case r: MutableInt     => r.value.asInstanceOf[T]
+    case r: MutableByte    => r.value.asInstanceOf[T]
+    case r: MutableFloat   => r.value.asInstanceOf[T]
+    case r: MutableShort   => r.value.asInstanceOf[T]
+    case r: MutableDouble  => r.value.asInstanceOf[T]
+    case r: MutableBoolean => r.value.asInstanceOf[T]
+    case r: MutableLong    => r.value.asInstanceOf[T]
+    case r                 => r.asInstanceOf[MutableAny].value.asInstanceOf[T]
   }
 }