diff --git a/example/persistence/db_mysql.py b/example/persistence/db_mysql.py
index 4a9580c..18c5767 100644
--- a/example/persistence/db_mysql.py
+++ b/example/persistence/db_mysql.py
@@ -133,3 +133,7 @@ def fetch_many(self, size: int = None) -> list:
     def fetch_all(self) -> list:
         return self._cursor.fetchall()
 
+
+    def close_cursor(self) -> None:
+        self._cursor.close()
+