How can I use SQLAlchemy for asynchronous queries?

How can I use SQLAlchemy for asynchronous queries?

You can use SQLAlchemy with async capabilities by utilizing the asyncio library and the asyncpg driver for PostgreSQL.

Can you show me a simple example of an async query?

Sure! Here's a basic example:

import asyncio
from sqlalchemy.ext.asyncio import create_async_engine, AsyncSession
from sqlalchemy.orm import sessionmaker

DATABASE_URL = 'postgresql+asyncpg://user:password@localhost/dbname'

engine = create_async_engine(DATABASE_URL, echo=True)
AsyncSessionLocal = sessionmaker(bind=engine, class_=AsyncSession)

async def get_data():
    async with AsyncSessionLocal() as session:
        result = await session.execute('SELECT * FROM my_table')
        return result.scalars().all()

asyncio.run(get_data())

What are the benefits of using async with SQLAlchemy?

Using async allows for non-blocking database operations, which can improve performance in I/O-bound applications, especially when handling multiple requests.

Are there any limitations I should be aware of?

Yes, some limitations include the need for an async-compatible database driver and potential complexity in managing async sessions.