如何实现特定列脱敏？这两种方法你都要会

-- 修改配置文件：   shared_preload_libraries = 'pg_stat_statements, anon'
-- 1. 创建并激活插件
CREATE   EXTENSION IF NOT EXISTS anon CASCADE;
SELECT   anon.mask_init();
-- 2.声明屏蔽的用户
CREATE ROLE   skynet;
COMMENT ON   ROLE skynet IS 'MASKED';
-- 3.声明屏蔽规则
COMMENT ON   COLUMN people.name IS 'MASKED WITH FUNCTION anon.random_last_name()';
COMMENT ON   COLUMN people.phone IS 'MASKED WITH FUNCTION   anon.partial(phone,2,$$******$$,2)';
-- 4. 查询屏蔽敏感信息的用户
\! psql test   -U skynet -c 'SELECT * FROM people;'
 id    |   name   |     phone
-----+----------+------------
T800 |   n3xtchen | 13******11

-- 1. 创建测试用户
create user   root;
create user   normal_user;
-- 2. 切换到root建表 & 视图
set role root;
create table   user_phone_number(id int, user_name name, phone_number name);
insert into   user_phone_number values(1, '张三', '12345678');
insert into   user_phone_number values(1, '李四', '56781234');
create or   replace view member_phone_number as
    SELECT
            S.id,
            S.user_name,
            substring(S.phone_number, 1,1) ||   '******' ||substring(S.phone_number, 8,8) as phone_number
    FROM user_phone_number AS S;
-- 3. 回收表的权限，授予普通用户view权限
revoke all on   user_phone_number from public;
grant all on   member_phone_number to normal_user;
-- 4. 使用普通用户测试
reset role;
set role   normal_user;
select * from   user_phone_number;
select * from   member_phone_number;