Make a table readonly in Postgres

trigger.sql

create trigger trades_readonly_trigger before insert or update or delete or truncate on trades for each statement execute procedure readonly_trigger_function();

trigger_function.sql

create or replace function readonly_trigger_function() returns trigger as $$
begin
  raise exception 'The "%" table is read only!', TG_TABLE_NAME using hint = 'Look at tables that inherit from this table and write to them instead.';
  return null;
end;
$$ language 'plpgsql';

Thanks a lot!

thanks from me as well