For the tl;dr: Docker FDW is a thing. Star it, hack it, try it out. File bugs, be happy. If you want to see what it’s like to read, there’s some example SQL down below. The question is first, what the heck is a PostgreSQL Foreign Data Wrapper? PostgreSQL Foreign Data Wrappers are plugins that allow C libraries to provide an adaptor for PostgreSQL to talk to an external database. Some folks have used this to wrap stuff like MongoDB, which I always found to be hilarous (and an epic hack). E...