How to create read only user in PostgreSQL

read-access.sql

-- 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 tomek WITH PASSWORD 'secret';
GRANT readaccess TO tomek;

Hi there are four databases present in this server. When i create this user, that user can create tables in different databases. I want to restrict that too.

Thank you very much,

Thank you @tomek @slavafomin

tks man

CREATE ROLE readaccess;

GRANT USAGE ON SCHEMA public TO readaccess;
GRANT SELECT ON ALL TABLES IN SCHEMA public TO readaccess;
ALTER DEFAULT PRIVILEGES IN SCHEMA public GRANT SELECT ON TABLES TO readaccess;

GRANT CONNECT ON DATABASE 'database_name' to readaccess;

CREATE USER user_name WITH PASSWORD ‘password’;
GRANT readaccess TO user_name;

GRANT REFERENCES ON ALL TABLES IN SCHEMA public TO readaccess;
To be able to see PrimaryKey constraint

Thanks it's useful

This is golden

Getting permission denied error on viewing list of data from any tables