diff --git a/example/CMakeLists.txt b/example/CMakeLists.txt
index 4cb204c5..0a7e6c75 100644
--- a/example/CMakeLists.txt
+++ b/example/CMakeLists.txt
@@ -1,7 +1,7 @@
 add_executable(s3select_example s3select_example.cpp)
 target_include_directories(s3select_example PUBLIC ../include ../rapidjson/include)
 add_executable(s3select_scaleup s3select_scaleup.cpp)
-target_include_directories(s3select_scaleup PUBLIC ../include)
+target_include_directories(s3select_scaleup PUBLIC ../include ../rapidjson/include)
 
 find_package(Arrow QUIET)
 
diff --git a/example/s3select_example.cpp b/example/s3select_example.cpp
index 3733eaa0..1e0c4811 100644
--- a/example/s3select_example.cpp
+++ b/example/s3select_example.cpp
@@ -458,6 +458,7 @@ int run_on_localFile(char* input_query)
   s3select_result result;
   s3selectEngine::csv_object::csv_defintions csv;
   csv.use_header_info = false;
+  bool do_aggregate = false;
   //csv.column_delimiter='|';
   //csv.row_delimiter='\t';
 
diff --git a/include/s3select.h b/include/s3select.h
index fc1c3231..0015c2e2 100644
--- a/include/s3select.h
+++ b/include/s3select.h
@@ -2723,7 +2723,7 @@ class json_object : public base_s3object
   JsonParserHandler JsonHandler;
   size_t m_processed_bytes;
   bool m_end_of_stream;
-  std::string s3select_result;
+  s3select_result m_result;
   size_t m_row_count;
   bool star_operation_ind;
   std::string m_error_description;
@@ -2792,23 +2792,23 @@ class json_object : public base_s3object
       //execute statement on row 
       //create response (TODO callback)
 
-      size_t result_len = s3select_result.size();
+      size_t result_len = m_result.size();
       int status=0;
       try{
-	status = getMatchRow(s3select_result);
+	status = getMatchRow(m_result);
       }
       catch(s3selectEngine::base_s3select_exception& e)
       {
-	sql_error_handling(e,s3select_result);
+	sql_error_handling(e,m_result.str());
 	status = -1;
       }
 
       m_sa->clear_data(); 
-      if(star_operation_ind && (s3select_result.size() != result_len))
+      if(star_operation_ind && (m_result.size() != result_len))
       {//as explained above the star-operation is displayed differently
 	std::string end_of_row;
 	end_of_row = "#=== " + std::to_string(m_row_count++) + " ===#\n";
-	s3select_result.append(end_of_row);
+	m_result.append(end_of_row);
       }
       return status;
   }
@@ -2833,10 +2833,10 @@ class json_object : public base_s3object
     //the error-handling takes care of the error flow.
     m_error_description = e.what();
     m_error_count++;
-    s3select_result.append(std::to_string(m_error_count));
-    s3select_result += " : ";
-    s3select_result.append(m_error_description);
-    s3select_result += m_csv_defintion.output_row_delimiter;
+    m_result.append(std::to_string(m_error_count));
+    m_result.append(std::string(" : "));
+    m_result.append(m_error_description);
+    m_result.append(&m_csv_defintion.output_row_delimiter,1);
   }
 
 public:
@@ -2845,21 +2845,21 @@ class json_object : public base_s3object
   {
     int status=0;
     m_processed_bytes += stream_length;
-    s3select_result.clear();
+    m_result.clear();
 
     if(!stream_length || !json_stream)//TODO m_processed_bytes(?)
     {//last processing cycle
       JsonHandler.process_json_buffer(0, 0, true);//TODO end-of-stream = end-of-row
       m_end_of_stream = true;
       sql_execution_on_row_cb();
-      result = s3select_result;
+      result = m_result.str();
       return 0;
     }
 
     try{
     //the handler is processing any buffer size and return results per each buffer
       status = JsonHandler.process_json_buffer((char*)json_stream, stream_length);
-      result = s3select_result;//TODO remove this result copy
+      result = m_result.str();//TODO remove this result copy
     }
     catch(std::exception &e)
     {
@@ -2878,6 +2878,8 @@ class json_object : public base_s3object
 
   ~json_object() = default;
 
+};
+
 class merge_results : public base_s3object
 {//purpose: upon processing several stream on a single aggregate query, this object should merge results.
 
diff --git a/include/s3select_oper.h b/include/s3select_oper.h
index 62b4c1b0..53a4d8ce 100644
--- a/include/s3select_oper.h
+++ b/include/s3select_oper.h
@@ -1335,6 +1335,8 @@ class base_statement
   m_projection_alias(nullptr), m_eval_stack_depth(0), m_skip_non_aggregate_op(false),
   execution_phase(multiple_executions_en::NA){}
 
+  multiple_executions_en execution_phase;
+
   virtual value& eval()
   {
     //purpose: on aggregation flow to run only the correct subtree(aggregation subtree)
diff --git a/test/s3select_test.cpp b/test/s3select_test.cpp
index b4f93204..801cc2be 100644
--- a/test/s3select_test.cpp
+++ b/test/s3select_test.cpp
@@ -825,8 +825,7 @@ void test_single_column_single_row(const char* input_query,const char* expected_
 #ifdef _ARROW_EXIST
     parquet_csv_report_error(parquet_result.str(),csv_result.str());
 #endif
-    json_csv_report_error(json_result, s3select_result);
-    ASSERT_EQ(s3select_result, std::string(expected_result));
+    json_csv_report_error(json_result, csv_result.str());
     ASSERT_EQ(csv_result.str(), std::string(expected_result));
 }
 
@@ -2664,7 +2663,8 @@ void generate_csv_quote_and_escape(std::string& out, char quote = '"', char escp
 
 TEST(TestS3selectFunctions, csv_quote_string_and_escape_char)
 {
-  std::string input, s3select_result_1, s3select_result_2, s3select_result_3;
+  std::string input; 
+  s3select_result s3select_result_1, s3select_result_2, s3select_result_3;
   csv_object::csv_defintions csv;
   generate_csv_quote_and_escape(input);
   s3select s3select_syntax1, s3select_syntax2, s3select_syntax3;
@@ -2683,7 +2683,7 @@ TEST(TestS3selectFunctions, csv_quote_string_and_escape_char)
   s3selectEngine::csv_object s3_csv_object_second(&s3select_syntax2, csv);
   s3_csv_object_second.run_s3select_on_object(s3select_result_2, input.c_str(), input.size(), false, false, true);
 
-  EXPECT_EQ(s3select_result_1, s3select_result_2);
+  EXPECT_EQ(s3select_result_1.str(), s3select_result_2.str());
 
   csv.escape_char = '\0';
   csv.quot_char = '\0';
@@ -2695,13 +2695,13 @@ TEST(TestS3selectFunctions, csv_quote_string_and_escape_char)
   s3selectEngine::csv_object s3_csv_object_third(&s3select_syntax3, csv);
   s3_csv_object_third.run_s3select_on_object(s3select_result_3, input.c_str(), input.size(), false, false, true);
 
-  EXPECT_EQ(s3select_result_3, input);
+  EXPECT_EQ(s3select_result_3.str(), input);
 }
 
 TEST(TestS3selectFunctions, csv_comment_line_and_trim_char)
 {
   std::string input;
-  std::string s3select_result_1, s3select_result_2;
+  s3select_result s3select_result_1, s3select_result_2;
   generate_csv_quote_and_escape(input);
   s3select s3select_syntax;
 
@@ -2725,7 +2725,7 @@ TEST(TestS3selectFunctions, csv_comment_line_and_trim_char)
   s3selectEngine::csv_object s3_csv_object_second(&s3select_syntax, csv);
   s3_csv_object_second.run_s3select_on_object(s3select_result_2, input.c_str(), input.size(), false, false, true);
 
-  EXPECT_EQ(s3select_result_1, s3select_result_2);
+  EXPECT_EQ(s3select_result_1.str(), s3select_result_2.str());
 }
 
 TEST(TestS3selectFunctions, presto_syntax_alignments)
diff --git a/test/s3select_test.h b/test/s3select_test.h
index e5b8f94d..be0ad2f6 100644
--- a/test/s3select_test.h
+++ b/test/s3select_test.h
@@ -691,7 +691,7 @@ std::string run_s3select(std::string expression,std::string input, const char* j
   }
 
   run_json_query(json_query, js, json_result);
-  json_csv_report_error(json_result, s3select_result);
+  json_csv_report_error(json_result, csv_result.str());
 
   return csv_result.str();
 }