https://corkboardconnections.blogspot.com/2014/07/take-procedural-writing-to-next-step.html
Corkboard Connections: Take Procedural Writing to the Next "Step"
Jul 10, 2014 - Corkboard Connections is a blog written by Laura Candler who enjoys connecting terrific teachers with amazing resources!
corkboard connectionsprocedural writingto thetakenext
https://www.postgresql.org/docs/9.1/plhandler.html
PostgreSQL: Documentation: 9.1: Writing A Procedural Language Handler
postgresqldocumentationwritingprocedurallanguage