You just know they're going to run custom code, fck up their database and then still complain.
I'm not tooo familiar with DBs, but I know customers. They're going to present custom views to your client SDK. They're going to mirror your read-only DB into their own and implement stuff there. They're going to depend on every kind of implementation detail of your DB's specific version ("It worked with last version and YOU broke it!"). They're going to run the slowest Joins you've ever seen just to get data that belongs together anyway and that you would have written a performant resolver for.
Oh, and of course, you will need 30 client libraries. Python, Java, Swift, C++, JavaScript and 6+ versions each. Compare that to "hit our CRUD REST API with a JSON object, simply send the Authorization Bearer ey token and you're fine."
I'm not tooo familiar with DBs, but I know customers. They're going to present custom views to your client SDK. They're going to mirror your read-only DB into their own and implement stuff there. They're going to depend on every kind of implementation detail of your DB's specific version ("It worked with last version and YOU broke it!"). They're going to run the slowest Joins you've ever seen just to get data that belongs together anyway and that you would have written a performant resolver for.
Oh, and of course, you will need 30 client libraries. Python, Java, Swift, C++, JavaScript and 6+ versions each. Compare that to "hit our CRUD REST API with a JSON object, simply send the Authorization Bearer ey token and you're fine."