Ruby and PostgreSQL, a love story

PostgreSQL 9.1 introduced Foreign Data Wrappers, as an implementation of SQL/MED foreign tables, to provide transparent access to external data. Restricted to being written in C, writing FDWs can be a hard task.

In this talk we will learn just enough of mruby's (the ISO-compliant version of Ruby) internals to understand how one can embed mruby in an external program (like PostgreSQL), and start writing Foreign Data Wrappers in Ruby.