1
我有一个函数,我想要创建一个用户,插入用户到表和IF提供添加用户到角色。我可以创建用户并将它们添加到使用第一个函数创建的表格中,但我无法有条件地将它们添加到组中。我想要选择不将用户添加到角色或包含角色并将该角色授予用户。这里是我的功能,以创建工作Postgres函数与嵌套IF
CREATE OR REPLACE FUNCTION create_user(
new_user character varying,
temp_password character varying,
grant_role text default NULL)
RETURNS text AS
$BODY$
BEGIN
IF NOT EXISTS (SELECT usename FROM pg_catalog.pg_user
Where usename not in ('postgres','repl','pgpool')
and usename = new_user) THEN
EXECUTE format('CREATE USER ' || new_user || ' with password ''' || temp_password || ''';');
EXECUTE format('insert into open_sesame (user_name, last_change_date, next_change_date) VALUES(''' || new_user || ''',
date(now()),
date(now() + interval ''1 days''));');
RETURN 'CREATED ROLE';
ELSE
RETURN format('ROLE ''%I'' ALREADY EXISTS', new_user);
END IF;
END;
$BODY$
LANGUAGE plpgsql VOLATILE SECURITY DEFINER
COST 100;
ALTER FUNCTION create_user(character varying, character varying)
OWNER TO postgres;
我想要做这样的事的伪代码
BEGIN
IF NOT EXISTS (SELECT usename FROM pg_catalog.pg_user
Where usename not in ('postgres','repl','pgpool')
and usename = new_user)
&& IF NOT EXISTS (SELECT rolname FROM pg_roles WHERE rolname = grant_role and rolname <> 'postgres')
&& grant_role IS NOT NULL THEN
EXECUTE format('CREATE USER ' || new_user || ' with password ''' || temp_password || ''';');
EXECUTE format('GRANT ' || grant_role || ' to ' || new_user ||';');
EXECUTE format('insert into open_sesame (user_name, last_change_date, next_change_date) VALUES(''' || new_user || ''', date(now()), date(now() + interval ''1 days''));');
RETURN 'CREATED USER WITH ROLE';
ELSE
IF NOT EXISTS (SELECT usename FROM pg_catalog.pg_user
Where usename not in ('postgres','repl','pgpool')
and usename = new_user)
EXECUTE format('CREATE USER ' || new_user || ' with password ''' || temp_password || ''';');
EXECUTE format('insert into open_sesame (user_name, last_change_date, next_change_date) VALUES(''' || new_user || ''', date(now()),date(now() + interval ''1 days''));');
RETURN 'CREATED USER ONLY';
ELSE
RETURN 'NO USER CREATED';
END IF;
END IF;
END;
任何帮助是非常赞赏的用户。