diff --git a/child.c b/child.c
index dfd5b12..e71acb7 100644
--- a/child.c
+++ b/child.c
@@ -419,7 +419,7 @@ void do_child(int unix_fd, int inet_fd)
 						!strcmp(sp->database, "postgres") ||
 						!strcmp(sp->database, "regression"))
 					{
-						reset_variables();
+						reset_connection();
 						pool_close(frontend);
 						pool_send_frontend_exits(backend);
 						pool_discard_cp(sp->user, sp->database, sp->major);
diff --git a/pool.h b/pool.h
index 9ab724e..2cab04c 100644
--- a/pool.h
+++ b/pool.h
@@ -691,6 +691,7 @@ extern void check_stop_request(void);
 
 /* pool_process_query.c */
 extern void reset_variables(void);
+extern void reset_connection(void);
 extern void per_node_statement_log(POOL_CONNECTION_POOL *backend, int node_id, char *query);
 extern POOL_STATUS pool_extract_error_message(POOL_CONNECTION *backend, int major, bool unread, char **message);
 extern POOL_STATUS do_command(POOL_CONNECTION *frontend, POOL_CONNECTION *backend,
diff --git a/pool_process_query.c b/pool_process_query.c
index 017b241..a6802c4 100644
--- a/pool_process_query.c
+++ b/pool_process_query.c
@@ -1865,6 +1865,18 @@ void reset_variables(void)
 	receive_extended_begin = 0;
 }
 
+
+/*
+ * if connection_cache == 0, we don't need reset_query.
+ * but we need reset prepared list.
+ */
+void reset_connection(void)
+{
+	reset_variables();
+	reset_prepared_list(&prepared_list);
+}
+
+
 /*
  * Reset backend status. return values are:
  * 0: no query was issued 1: a query was issued 2: no more queries remain -1: error
-- 
1.6.6