Multi-Data-Source Architecture: Stop Letting AI Lock Your Project to One Database

Thu, 13 Aug 2026 00:00:00 +0000

Many projects start with just one database. So AI naturally writes:

async def get_user(user_id: int):
    async with sqlite_session() as session:
        ...

Or even more directly:

conn = sqlite3.connect("app.db")

The feature certainly works, but problems will show up later.

Today it’s SQLite, tomorrow it might need to switch to PostgreSQL …

As the codebase grows, the project quickly becomes:

Business code tightly coupled to a specific storage technology.

This is exactly the problem that Multi-Data-Source Architecture aims to solve.

Database on Interesting AI