在python中连接失败后重试SQL连接的正确语法？

import pymysql
import time

def execute_sql(sql):
    try:
        # 连接数据库
        conn = pymysql.connect(host='数据库主机地址', port=3306, user='用户名', password='密码', db='数据库名', charset='utf8')
        # 创建游标对象
        cursor = conn.cursor()
        # 执行SQL语句
        cursor.execute(sql)
        # 提交事务
        conn.commit()
        # 关闭游标和连接
        cursor.close()
        conn.close()
        return True
    except Exception as e:
        print("连接数据库失败：", e)
        return False

def retry_connect(sql, max_retries=3, retry_interval=5):
    retries = 0
    while retries < max_retries:
        if execute_sql(sql):
            return True
        else:
            retries += 1
            print("正在重试连接数据库，第{}次重试".format(retries))
            time.sleep(retry_interval)
    return False

sql = "SELECT * FROM table_name"
retry_connect(sql)