ALTER ROW LEVEL SECURITY POLICY

功能描述

对已存在的行访问控制策略（包括行访问控制策略的名称、行访问控制指定的用户、行访问控制的策略表达式）进行修改。

注意事项

表的所有者或管理员用户才能进行此操作。

语法格式

1. ALTER [ ROW LEVEL SECURITY ] POLICY [ IF EXISTS ] policy_name ON table_name RENAME TO new_policy_name;

3. ALTER [ ROW LEVEL SECURITY ] POLICY policy_name ON table_name
4. [ TO { role_name | PUBLIC } [, ...] ]
5. [ USING ( using_expression ) ];

参数说明

• policy_name

行访问控制策略名称。 - table_name

行访问控制策略的表名。 - new_policy_name

新的行访问控制策略名称。 - role_name

行访问控制策略应用的数据库用户，可以指定多个用户，PUBLIC表示应用到所有用户。 - using_expression

行访问控制的表达式，返回值为boolean类型。

示例

1. --创建数据表all_data
2. openGauss=# CREATE TABLE all_data(id int, role varchar(100), data varchar(100));

4. --创建行访问控制策略，当前用户只能查看用户自身的数据
5. openGauss=# CREATE ROW LEVEL SECURITY POLICY all_data_rls ON all_data USING(role = CURRENT_USER);
6. openGauss=# \d+ all_data
7. Table "public.all_data"
8. Column |          Type          | Modifiers | Storage  | Stats target | Description
9. --------+------------------------+-----------+----------+--------------+-------------
10. id     | integer                |           | plain    |              |
11. role   | character varying(100) |           | extended |              |
12. data   | character varying(100) |           | extended |              |
13. Row Level Security Policies:
14. POLICY "all_data_rls"
15. TO public
16. USING (((role)::name = "current_user"()))
17. Has OIDs: no
18. Options: orientation=row, compression=no

20. --修改行访问控制all_data_rls的名称
21. openGauss=# ALTER ROW LEVEL SECURITY POLICY all_data_rls ON all_data RENAME TO all_data_new_rls;

23. --修改行访问控制策略影响的用户
24. openGauss=# ALTER ROW LEVEL SECURITY POLICY all_data_new_rls ON all_data TO alice, bob;
25. openGauss=# \d+ all_data
26. Table "public.all_data"
27. Column |          Type          | Modifiers | Storage  | Stats target | Description
28. --------+------------------------+-----------+----------+--------------+-------------
29. id     | integer                |           | plain    |              |
30. role   | character varying(100) |           | extended |              |
31. data   | character varying(100) |           | extended |              |
32. Row Level Security Policies:
33. POLICY "all_data_new_rls" FOR ALL
34. TO alice,bob
35. USING (((role)::name = "current_user"()))
36. Has OIDs: no
37. Options: orientation=row, compression=no

39. --修改行访问控制策略表达式
40. openGauss=# ALTER ROW LEVEL SECURITY POLICY all_data_new_rls ON all_data USING (id > 100 AND role = current_user);
41. openGauss=# \d+ all_data
42. Table "public.all_data"
43. Column |          Type          | Modifiers | Storage  | Stats target | Description
44. --------+------------------------+-----------+----------+--------------+-------------
45. id     | integer                |           | plain    |              |
46. role   | character varying(100) |           | extended |              |
47. data   | character varying(100) |           | extended |              |
48. Row Level Security Policies:
49. POLICY "all_data_new_rls" FOR ALL
50. TO alice,bob
51. USING (((id > 100) AND ((role)::name = "current_user"())))
52. Has OIDs: no
53. Options: orientation=row, compression=no

相关链接

CREATE ROW LEVEL SECURITY POLICY，DROP ROW LEVEL SECURITY POLICY