Pg数据库添加只读用户。

CREATE USER test2 WITH ENCRYPTED PASSWORD ‘test2‘;
alter user test2 set default_transaction_read_only=on;
GRANT USAGE ON SCHEMA public to test2;
ALTER DEFAULT PRIVILEGES IN SCHEMA public GRANT SELECT ON TABLES TO test2;

GRANT USAGE ON SCHEMA public to test2;
GRANT SELECT ON ALL SEQUENCES IN SCHEMA public TO test2;
GRANT SELECT ON ALL TABLES IN SCHEMA public TO test2;

创建用户及指定密码：

CREATE USER readonly WITH ENCRYPTED PASSWORD ‘ropass‘;
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 foo to readonly;
切换到指定数据库：

\c foo
赋予用户表、序列查看权限：

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;

postgresql创建只读用户
1.创建一个用户名为readonly密码为ropass的用户
CREATE USER readonly WITH ENCRYPTED PASSWORD ‘ropass‘;
 
2.用户只读事务
alter user readonly set default_transaction_read_only=on;
 
3.把所有库的语言的USAGE权限给到readonly
GRANT USAGE ON SCHEMA public to readonly;      
 
4.授予select权限(这句要进入具体数据库操作在哪个db环境执行就授予那个db的权)
 grant select on all tables in schema public to readonly;