diff --git a/cpp/dbpool.cc b/cpp/dbpool.cc
index 844f69a..a7b2000 100644
--- a/cpp/dbpool.cc
+++ b/cpp/dbpool.cc
@@ -75,29 +75,6 @@ namespace f8
             work_thread_ = new std::thread(&DBThread::WorkThreadProc, this);
         }
 
-#if 0
-        void AddAsyncQuery(int sockhandle, int query_type, long long context_id, const std::string& sql)
-        {
-            AsyncQueryNode *p = new AsyncQueryNode();
-            p->query_type = query_type;
-            p->socket_handle = sockhandle;
-            p->context_id = context_id;
-            p->sql = sql;
-
-            std::unique_lock<std::mutex> lk(*loop_mutex_);
-            msg_mutex_->lock();
-            if (bot_node_) {
-                bot_node_->nextnode = p;
-                bot_node_ = p;
-            } else {
-                top_node_ = p;
-                bot_node_ = p;
-            }
-            msg_mutex_->unlock();
-            loop_cond_->notify_all();
-        }
-#endif
-
         void AddAsyncQuery(AsyncQueryNode* p)
         {
             std::unique_lock<std::mutex> lk(*loop_mutex_);