- 创建用户及指定密码：
CREATE USER readonly WITH ENCRYPTED PASSWORD 'Test@1234';
- 设置用户默认事务只读：
alter user readonly set default_transaction_read_only=on;
- 赋予用户权限，查看public模式下所有表：
GRANT USAGE ON SCHEMA public to readonly;
ALTER DEFAULT PRIVILEGES IN SCHEMA public GRANT SELECT ON TABLES TO readonly;
- 赋予用户连接数据库权限：
GRANT CONNECT ON DATABASE demo to readonly;
- 切换到指定数据库：
\c demo
- 赋予用户表、序列查看权限（如果后续有新增的表或者序列则需要再次执行下面指令）：
GRANT USAGE ON SCHEMA public to readonly;
GRANT SELECT ON ALL SEQUENCES IN SCHEMA public TO readonly;
GRANT SELECT ON ALL TABLES IN SCHEMA public TO readonly;
转载自：博客园
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