I am experimenting with postgres and am wondering if there is any tutorial on how to properly add a new command to postgres.
I want to add a new constraint on "CREATE ROLE" that requires an integer, it has an identifier that is not a known (reserved or unreserved keyword) in postgres, say we call it TestPatrick. In other words, I want to do this "CREATE ROLE X TestPatrick=10". I am having an issue with having postgres recognize my new syntax.
I have seen this video: https://www.youtube.com/watch?v=uSEXTcEiXGQ and was able to add have my postgres compile with my added word (modified gram.y, kwlist.h, gram.cpp etc based on the video). However, when I use my syntax on a client session, it still doesn't recognize my syntax... Are there any specific lexer changes I need to make? I followed the example of CONNECTION LIMIT and tried to mimic it for Create ROLE.
