Postgres Roles and Privileges

AI summary

This article explores the PostgreSQL permission system, detailing the relationship between database objects, roles, and privileges. It provides a practical guide on managing access control, covering ownership, privilege inheritance, and the nuances of the public role and superuser permissions.

Key points

• Postgres uses a model based on roles (users/groups), database objects (tables/functions), and assigned privileges.
• Object ownership grants full control, and ownership must be transferred before a role can be deleted.
• Role inheritance allows users to assume the permissions of parent groups, simplifying access management.
• The 'public' role is implicitly assigned to all roles and should be managed carefully to avoid broad permission leaks.
• Default privileges are essential for controlling access to objects that will be created in the future.