Typesafe SQL, typesafe template (or just useful template, not the ones in the stdlib which sucks tremendously), model metaprogramming, etc...
I did see a post the other day criticizing Go's standard template language and approach. Maybe someday someone will stand up and build an alternative, more advanced template engine - it can just be a library, after all.
Either it analyzes the given SQL to determine the in/out types of each SQL query, or it calls the database describe feature at compile-time.
Looking at the github there seems to a lot of "parsing problems" for the schema files :(