import pymysql
import yaml
import os

# 切换到脚本所在目录
script_dir = os.path.dirname(os.path.abspath(__file__))
os.chdir(script_dir)

# 读取配置
with open('config.yaml', 'r', encoding='utf-8') as f:
    config = yaml.safe_load(f)

db_config = config['database']

# 连接数据库
connection = pymysql.connect(
    host=db_config['host'],
    port=db_config['port'],
    user=db_config['user'],
    password=db_config['password'],
    database=db_config['database']
)

try:
    with connection.cursor() as cursor:
        # 执行迁移
        sql = "ALTER TABLE tracking_record MODIFY user_id VARCHAR(50)"
        print(f"执行 SQL: {sql}")
        cursor.execute(sql)
        connection.commit()
        print("✓ 数据库迁移成功！tracking_record.user_id 字段已改为 VARCHAR(50)")
except Exception as e:
    print(f"✗ 迁移失败: {e}")
    connection.rollback()
finally:
    connection.close()