PostgreSQL创建只读用户

创建用户及指定密码：

1	`create user zhangyou with encrypted password ' 123456 '` `;`

设置用户默认事务只读：

1	`alter user zhangyou set default_transaction_read_only=on;`

赋予用户权限，查看public模式下所有表：

1 2	`grant usage on schema public to zhangyou ;` `alter default privileges in` `schema public grant select on tables to` `zhangyou ;`

赋予用户连接数据库权限：

1	`grant connect on database test to zhangyou ;`

切换到指定数据库：

\c test

赋予用户表、序列查看权限：

GRANT USAGE ON SCHEMA public to zhangyou ;

GRANT SELECT ON ALL SEQUENCES IN SCHEMA public TO zhangyou ;

GRANT SELECT ON ALL TABLES IN SCHEMA public TO zhangyou ;