> Sure, if you want to think of the thing that is formed by all combined requests from all clients over the lifetime of the database, as a program The thing th

> Sure, if you want to think of the thing that is formed by all combined requests from all clients over the lifetime of the database, as a program The thing that serves responses to requests is a program. And it's not just a "simple, dirty request handler script," it's often enormously complex. Entire companies exist with their product exposed via HTTP APIs. The reason you don't see exceptions in databases, operating systems, etc is because they're often written in C++, which has notoriously wonky semantics around exceptions, or C, which doesn't have exceptions at all.