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sqlmw wrap a database/sql driver with middleware


sqlmw provides an absurdly simple API that allows a caller to wrap a database/sql driver with middleware.

This provides an abstraction similar to http middleware or GRPC interceptors but for the database/sql package. This allows a caller to implement observability like tracing and logging easily. More importantly, it also enables powerful possible behaviors like transparently modifying arguments, results or query execution strategy. This power allows programmers to implement functionality like automatic sharding, selective tracing, automatic caching, transparent query mirroring, retries, fail-over in a reuseable way, and more.