put the generated class into sql package

Author: Davies Liu

sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/CodeGenerator.scala

@@ -366,6 +366,7 @@ abstract class CodeGenerator[InType <: AnyRef, OutType <: AnyRef] extends Loggin
   private[this] def doCompile(code: String): GeneratedClass = {
     val evaluator = new ClassBodyEvaluator()
     evaluator.setParentClassLoader(getClass.getClassLoader)
+    evaluator.setClassName("org.apache.spark.sql.catalyst.expressions.codegen.GeneratedClass")
     evaluator.setDefaultImports(Array(
       classOf[PlatformDependent].getName,
       classOf[InternalRow].getName,

sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateMutableProjection.scala

@@ -69,17 +69,17 @@ object GenerateMutableProjection extends CodeGenerator[Seq[Expression], () => Mu
 
     val code = s"""
       public Object generate($exprType[] expr) {
-        return new SpecificProjection(expr);
+        return new SpecificMutableProjection(expr);
       }
 
-      class SpecificProjection extends ${classOf[BaseMutableProjection].getName} {
+      class SpecificMutableProjection extends ${classOf[BaseMutableProjection].getName} {
 
         private $exprType[] expressions;
         private $mutableRowType mutableRow;
         ${declareMutableStates(ctx)}
         ${declareAddedFunctions(ctx)}
 
-        public SpecificProjection($exprType[] expr) {
+        public SpecificMutableProjection($exprType[] expr) {
           expressions = expr;
           mutableRow = new $genericMutableRowType(${expressions.size});
           ${initMutableStates(ctx)}