如何更新数据库表列？FastAPI Python

from fastapi import FastAPI
from sqlalchemy import create_engine, Column, Integer, String
from sqlalchemy.orm import sessionmaker
from sqlalchemy.ext.declarative import declarative_base

# 连接数据库
DATABASE_URL = "sqlite:///./test.db"
engine = create_engine(DATABASE_URL)
SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)
Base = declarative_base()

# 定义数据模型
class User(Base):
    __tablename__ = "users"
    id = Column(Integer, primary_key=True, index=True)
    name = Column(String, index=True)

# 创建表
Base.metadata.create_all(bind=engine)

app = FastAPI()

@app.get("/update-column")
def update_column():
    # 更新表列名
    with SessionLocal() as session:
        session.execute("ALTER TABLE users RENAME COLUMN name TO full_name")
        session.commit()
    
    return {"message": "Column updated successfully"}