If you want to add some new function to postgresql, just check this ducument:
https://www.postgresql.org/docs/current/extend-how.html ------------------ Original ------------------ From: "jacktby" <jack...@gmail.com>; Date: Tue, Aug 1, 2023 05:27 PM To: "pgsql-general"<pgsql-general@lists.postgresql.org>; Subject: How to build a new grammer for pg? Hi, I??m trying to develop a new grammar for pg, can you give me a code example to reference?