-- Create a group
CREATE ROLE readaccess;

-- Grant access to existing tables
GRANT USAGE ON SCHEMA public TO readaccess;
GRANT SELECT ON ALL TABLES IN SCHEMA public TO readaccess;

-- Grant access to future tables
ALTER DEFAULT PRIVILEGES IN SCHEMA public GRANT SELECT ON TABLES TO readaccess;

-- Create a final user with password
CREATE USER masterread WITH PASSWORD 'masterread';
GRANT readaccess TO masterread;
-- Grant connect to db 
GRANT CONNECT ON DATABASE master TO masterread;