Ryan Booz divvies up ownership rights:
In the first security article, PostgreSQL Basics: Roles and Privileges, I discussed how roles (users and groups) are created and managed in PostgreSQL Depending on your background with permissions, particularly in other database products, some of those nuances in how permissions work may have been surprising.
Understanding how roles and privileges work in Postgres is key to understanding the next, and often more confusing part of security, object ownership. Although there are many privileges that can be assigned in Postgres, object ownership comes with a specific level of privilege that cannot be transferred to other roles. Understanding the implications of this is essential to the management of your database schema, and access to the objects it contains, over time.
Click through to learn more about how Postgres handles object ownership and defines who gets access to which objects.