我找不到这个问题的答案：为什么在授予权限后从表中选择会失败？
-- create new role
CREATE ROLE readonly;
-- grant access to all existing tables
GRANT CONNECT ON DATABASE shop TO readonly;
GRANT USAGE ON SCHEMA public TO readonly;
GRANT SELECT ON ALL TABLES IN SCHEMA public TO readonly;
GRANT SELECT ON ALL SEQUENCES IN SCHEMA public TO readonly;
GRANT EXECUTE ON ALL FUNCTIONS IN SCHEMA public TO readonly;
-- grant access to all table which will be created in the future
ALTER DEFAULT PRIVILEGES IN SCHEMA public GRANT SELECT …