[camus2]

what sagichmal is basically saying without saying it is go cant do what you want, you just cant write a generic Active Record framework in go,nor a generic data mapper.

the right approach ,when a language cant do what you want, IS code generation with a third party dynamic language.

If you know ruby for instance, ruby excels at code generation,so you could generate go code from a SQL schema or any manifest,then augment it with custom code in another go file that import the generated code.