pg_roles
   The view pg_roles provides access to
   information about database roles.  This is simply a publicly
   readable view of
   pg_authid
   that blanks out the password field.
  
Table 54.20. pg_roles Columns
Column Type Description  | 
|---|
        Role name  | 
        Role has superuser privileges  | 
        Role automatically inherits privileges of roles it is a member of  | 
        Role can create more roles  | 
        Role can create databases  | 
        Role can log in. That is, this role can be given as the initial session authorization identifier  | 
        Role is a replication role. A replication role can initiate replication connections and create and drop replication slots.  | 
        For roles that can log in, this sets maximum number of concurrent connections this role can make. -1 means no limit.  | 
        
       Not the password (always reads as   | 
        Password expiry time (only used for password authentication); null if no expiration  | 
        Role bypasses every row-level security policy, see Section 5.8 for more information.  | 
        Role-specific defaults for run-time configuration variables  | 
        ID of role  |