2

A Postgres server is a lot of things, not just row-oriented access methods: (The image above is from the Postgres documentation.) Postgres source code is available for anyone to use under a very permissive license. To implement a DBMS that is "based on PostgreSQL" you don't have to rewrite it from scratch. Say, if you want to introduce a different ...


Only top voted, non community-wiki answers of a minimum length are eligible