diff --git a/cpp/src/sdk/examples/simple/src/ClientTest.cpp b/cpp/src/sdk/examples/simple/src/ClientTest.cpp
index d6547079c3..01669680fc 100644
--- a/cpp/src/sdk/examples/simple/src/ClientTest.cpp
+++ b/cpp/src/sdk/examples/simple/src/ClientTest.cpp
@@ -7,11 +7,12 @@
 #include "MegaSearch.h"
 
 #include <iostream>
+#include <time.h>
+#include <unistd.h>
+
+using namespace megasearch;
 
 namespace {
-    static const std::string TABLE_NAME = "human face";
-    static const int64_t TABLE_DIMENSION = 512;
-
     void PrintTableSchema(const megasearch::TableSchema& tb_schema) {
         std::cout << "===========================================" << std::endl;
         std::cout << "Table name: " << tb_schema.table_name << std::endl;
@@ -20,52 +21,124 @@ namespace {
         std::cout << "Table partitions: " << tb_schema.partition_column_name_array.size() << std::endl;
         std::cout << "===========================================" << std::endl;
     }
+
+    std::string CurrentTime() {
+        time_t tt;
+        time( &tt );
+        tt = tt + 8*3600;
+        tm* t= gmtime( &tt );
+
+        std::string str = std::to_string(t->tm_year + 1900) + "_" + std::to_string(t->tm_mon + 1)
+                          + "_" + std::to_string(t->tm_mday) + "_" + std::to_string(t->tm_hour)
+                          + "_" + std::to_string(t->tm_min) + "_" + std::to_string(t->tm_sec);
+
+        return str;
+    }
+
+    std::string GetTableName() {
+        static std::string s_id(CurrentTime());
+        return s_id;
+    }
+
+    static const std::string TABLE_NAME = GetTableName();
+    static const std::string VECTOR_COLUMN_NAME = "face_vector";
+    static const int64_t TABLE_DIMENSION = 512;
+
+    void BuildVectors(int64_t from, int64_t to,
+                      std::vector<RowRecord>* vector_record_array,
+                      std::vector<QueryRecord>* query_record_array) {
+        if(to <= from){
+            return;
+        }
+
+        if(vector_record_array) {
+            vector_record_array->clear();
+        }
+        if(query_record_array) {
+            query_record_array->clear();
+        }
+
+        for (int64_t k = from; k < to; k++) {
+
+            std::vector<float> f_p;
+            f_p.resize(TABLE_DIMENSION);
+            for(int64_t i = 0; i < TABLE_DIMENSION; i++) {
+                f_p[i] = (float)(i + k);
+            }
+
+            if(vector_record_array) {
+                RowRecord record;
+                record.vector_map.insert(std::make_pair(VECTOR_COLUMN_NAME, f_p));
+                vector_record_array->emplace_back(record);
+            }
+
+            if(query_record_array) {
+                QueryRecord record;
+                record.vector_map.insert(std::make_pair(VECTOR_COLUMN_NAME, f_p));
+                query_record_array->emplace_back(record);
+            }
+        }
+    }
 }
 
 void
 ClientTest::Test(const std::string& address, const std::string& port) {
-    std::shared_ptr<megasearch::Connection> conn = megasearch::Connection::Create();
-    megasearch::ConnectParam param = { address, port };
+    std::shared_ptr<Connection> conn = Connection::Create();
+    ConnectParam param = { address, port };
     conn->Connect(param);
 
     {//create table
-        megasearch::TableSchema tb_schema;
-        megasearch::VectorColumn col1;
-        col1.name = "face";
+        TableSchema tb_schema;
+        VectorColumn col1;
+        col1.name = VECTOR_COLUMN_NAME;
         col1.dimension = TABLE_DIMENSION;
         col1.store_raw_vector = true;
         tb_schema.vector_column_array.emplace_back(col1);
 
-        megasearch::Column col2;
+        Column col2;
         col2.name = "age";
         tb_schema.attribute_column_array.emplace_back(col2);
 
         tb_schema.table_name = TABLE_NAME;
 
         PrintTableSchema(tb_schema);
-        megasearch::Status stat = conn->CreateTable(tb_schema);
+        Status stat = conn->CreateTable(tb_schema);
         std::cout << "Create table result: " << stat.ToString() << std::endl;
     }
 
     {//describe table
-        megasearch::TableSchema tb_schema;
-        megasearch::Status stat = conn->DescribeTable(TABLE_NAME, tb_schema);
+        TableSchema tb_schema;
+        Status stat = conn->DescribeTable(TABLE_NAME, tb_schema);
         std::cout << "Describe table result: " << stat.ToString() << std::endl;
         PrintTableSchema(tb_schema);
     }
 
     {//add vectors
-
+        std::vector<RowRecord> record_array;
+        BuildVectors(0, 10000, &record_array, nullptr);
+        std::vector<int64_t> record_ids;
+        std::cout << "Begin add vectors" << std::endl;
+        Status stat = conn->AddVector(TABLE_NAME, record_array, record_ids);
+        std::cout << "Add vector result: " << stat.ToString() << std::endl;
+        std::cout << "Returned vector ids: " << record_ids.size() << std::endl;
     }
 
     {//search vectors
+        sleep(10);
+        std::vector<QueryRecord> record_array;
+        BuildVectors(500, 510, nullptr, &record_array);
 
+        std::vector<TopKQueryResult> topk_query_result_array;
+        std::cout << "Begin search vectors" << std::endl;
+        Status stat = conn->SearchVector(TABLE_NAME, record_array, topk_query_result_array, 10);
+        std::cout << "Search vector result: " << stat.ToString() << std::endl;
+        std::cout << "Returned result count: " << topk_query_result_array.size() << std::endl;
     }
 
-    {//delete table
-        megasearch::Status stat = conn->DeleteTable(TABLE_NAME);
-        std::cout << "Delete table result: " << stat.ToString() << std::endl;
-    }
+//    {//delete table
+//        Status stat = conn->DeleteTable(TABLE_NAME);
+//        std::cout << "Delete table result: " << stat.ToString() << std::endl;
+//    }
 
-    megasearch::Connection::Destroy(conn);
+    Connection::Destroy(conn);
 }
\ No newline at end of file
diff --git a/cpp/src/server/MegasearchTask.cpp b/cpp/src/server/MegasearchTask.cpp
index 077f217d68..884557ffa4 100644
--- a/cpp/src/server/MegasearchTask.cpp
+++ b/cpp/src/server/MegasearchTask.cpp
@@ -163,7 +163,7 @@ ServerError DeleteTableTask::OnExecute() {
     error_msg_ = "delete table not implemented";
     SERVER_LOG_ERROR << error_msg_;
 
-    //IVecIdMapper::GetInstance()->DeleteGroup(table_name_);
+    IVecIdMapper::GetInstance()->DeleteGroup(table_name_);
 
     return SERVER_NOT_IMPLEMENT;
 }
@@ -349,7 +349,7 @@ ServerError SearchVectorTask::OnExecute() {
                     thrift_topk_result.query_result_arrays.emplace_back(thrift_result);
                 }
 
-                result_array_.push_back(thrift_topk_result);
+                result_array_.emplace_back(thrift_topk_result);
             }
             rc.Record("construct result");
         }