Hi, I've been exploring the pg_catalog tables and pointed a couple of tools at it to extract an ER diagram for a blog post. At first I thought it was a bug in the drawing tool but it appears that the relationships between the pg_catalog tables are implicit rather than enforced by the database, is that correct? For example, pg_class has relnamespace which according to the documentation refers to pg_namespace.oid (https://www.postgresql.org/docs/current/static/catalog-pg-class.html), yet there is no FK there as far as I can see. Maybe I am missing something or there is an interesting story as to why? Thanks, Neil -- Neil Anderson neil@xxxxxxxxxxxxxxxxxxx https://www.postgrescompare.com -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
