ERROR: permission denied for relation tablename on Postgres while trying a SELECT as a readonly user

Question

GRANT SELECT ON ALL TABLES IN SCHEMA public TO readonly;

The readonly user can connect, see the tables but when it tries to do a simple select it g

Answer 1

You should execute the next query:

GRANT ALL ON TABLE mytable TO myuser;

Or if your error is in a view then maybe the table does not have permission, so you should execute the next query:

GRANT ALL ON TABLE tbm_grupo TO myuser;