Trying to fix Lost connection to MySQL server during query

bot.py

@@ -105,20 +105,25 @@ db_cursor = db_connection.cursor()
 def close_database_connection(connection):
     connection.close()
 
-def insert_user_data(user_id, guild_id, permission, points, ban, askmultus, filter_value, chat_history, nickname, profile_picture, join_date, xp=0, level=1):
+def insert_user_data(user_id, guild_id, permission, points, ban, askmultus, filter_value, chat_history, xp=0, level=1, nickname="", profile_picture="", join_date=None, leave_date=None):
     insert_query = """
-    INSERT INTO user_data (user_id, guild_id, permission, points, ban, askmultus, filter_value, rank, chat_history, nickname, profile_picture, join_date, xp, level, leave_date)
+    INSERT INTO user_data (user_id, guild_id, permission, points, ban, askmultus, filter_value, rank, chat_history, xp, level, nickname, profile_picture, join_date, leave_date)
     VALUES (%s, %s, %s, %s, %s, %s, %s, %s, %s, %s, %s, %s, %s, %s, %s)
     """
     serialized_chat_history = json.dumps(chat_history)
-    data = (user_id, guild_id, permission, points, ban, askmultus, filter_value, 0, serialized_chat_history, nickname, profile_picture, join_date, xp, level, None)
-    try:
-        db_cursor.execute(insert_query, data)
+    data = (user_id, guild_id, permission, points, ban, askmultus, filter_value, 0, serialized_chat_history, xp, level, nickname, profile_picture, join_date, leave_date)
+
+    def execute_insert():
+        cursor = get_database_cursor()
+        cursor.execute(insert_query, data)
         db_connection.commit()
+    
+    try:
+        retry_query(execute_insert)
         print("User data inserted successfully.")
     except Exception as e:
-        print(f"Error inserting user data: {e}")
-        db_connection.rollback()
+        print(f"Error inserting user data after retries: {e}")
+
 
 def update_user_data(user_id, guild_id, field, value):
     global db_connection, db_cursor  # global-Deklaration muss vor dem Zugriff erfolgen
@@ -149,13 +154,42 @@ def update_user_data(user_id, guild_id, field, value):
 
 
 def connect_to_database():
-    return mysql.connector.connect(
+    connection = mysql.connector.connect(
         host=DB_HOST,
         port=DB_PORT,
         user=DB_USER,
         password=DB_PASSWORD,
         database=DB_DATABASE
     )
+    connection.autocommit = True  # Automatisches Commit für stabilere Abfragen
+    return connection
+
+def retry_query(func, *args, retries=3, delay=5):
+    for _ in range(retries):
+        try:
+            return func(*args)
+        except mysql.connector.Error as err:
+            print(f"Retrying due to error: {err}")
+            time.sleep(delay)
+    raise RuntimeError("Max retries exceeded")
+
+def get_database_cursor():
+    if not db_connection.is_connected():
+        db_connection.reconnect(attempts=3, delay=5)
+    return db_connection.cursor()
+
+pool = mysql.connector.pooling.MySQLConnectionPool(
+    pool_name="mypool",
+    pool_size=10,
+    host=DB_HOST,
+    port=DB_PORT,
+    user=DB_USER,
+    password=DB_PASSWORD,
+    database=DB_DATABASE
+)
+
+def connect_to_database():
+    return pool.get_connection()
 
 def close_database_connection(connection):
     connection.close()