This page describes how Google Cloud SQL works with PostgreSQL users and roles. PostgreSQL roles enable you to control what kind of access and capabilities a user has then they access your PostgreSQL instance.
PostgreSQL roles and users
PostgreSQL roles can be a single role, or they can function as a group of roles.
A user is simply a role with the ability to login (the role has the
attribute). Because all roles created by Cloud SQL have the
attribute, Cloud SQL uses the terms "role" and "user" interchangeably.
However, if you create a role with the
psql client, it does not necessarily
All PostgreSQL users must have a password. You cannot login with a user that does not have a password.
Default PostgreSQL users
When you create a new Cloud SQL for PostgreSQL instance, the default
postgres user is already created for you, though you must set its password.
postgres user is part of the
cloudsqlsuperuser role, and
has the following attributes (privileges):
LOGIN. It does not have the
Other PostgreSQL users
You can create other PostgreSQL users, or roles. All users you create using
Cloud SQL are created as part of the
cloudsqlsuperuser role, and have the
same set of attributes as the
LOGIN. If you create a new user with the
psql client, you can choose
to associate it with a different role, or give it different attributes.