pg_auth_members
The catalog pg_auth_members shows the membership relations between roles. Any non-circular set of relationships is allowed.
Because user identities are cluster-wide, pg_auth_members is shared across all databases of a cluster: there is only one copy of pg_auth_members per cluster, not one per database.
pg_auth_members Columns
| Column Type | Description |
|---|---|
roleid oid (references pg_authid.oid) | ID of a role that has a member |
member oid (references pg_authid.oid) | ID of a role that is a member of roleid |
grantor oid (references pg_authid.oid) | ID of the role that granted this membership |
admin_option bool | True if member can grant membership in roleid to others |