POSTGRESQL 批量权限 管理方法
原博地址 https://yq.aliyun.com/articles/41512?spm=a2c4e.11153940.0.0.20b7640fcDiFQA
关于PostgreSQL的逻辑架构和权限体系，可以参考
https://yq.aliyun.com/articles/41210
本文将给大家介绍一下如何批量管理表，视图，物化视图的权限。
以及如何管理默认权限，批量赋予schema的权限。
对整个SCHEMA的对象进行权限管理
PostgreSQL 从9.0开始就提供了比较方便的对整个schema的指定对象赋权给目标用的语法。
http://www.postgresql.org/docs/9.5/static/sql-grant.html
例子
GRANT { { SELECT | INSERT | UPDATE | DELETE | TRUNCATE | REFERENCES | TRIGGER }
[, ...] | ALL [ PRIVILEGES ] } ON { [ TABLE ] table_name [, ...]
| ALL TABLES IN SCHEMA schema_name [, ...] } TO role_specification [, ...] [ WITH GRANT OPTION ]REVOKE [ GRANT OPTION FOR ]
{ { SELECT | INSERT | UPDATE | DELETE | TRUNCATE | REFERENCES | TRIGGER }
[, ...] | ALL [ PRIVILEGES ] } ON { [ TABLE ] table_name [, ...]
| ALL TABLES IN SCHEMA schema_name [, ...] } FROM { [ GROUP ] role_name | PUBLIC } [, ...]
[ CASCADE | RESTRICT ]
将schema digoal下的所有表的select,update权限赋予给test用户。
注意
如果digoal.*中包含了非当前用户的表，并且当前用户非超级用户，并且当前用户没有这些表的select,update的with grant option权限。将报错。
换句话说，如果要确保这个赋权操作万无一失，可以选择使用超级用户来执行。
grant select,update on all tables in schema digoal to test;
将schema digoal下的所有表的select,update权限从test用户回收。
revoke select,update on all tables in schema digoal from test;
在对整个schema下的所有对象的权限管理完后， 别忘记了在对象之上，还需要对schema、database、instance进行相应的赋权。
如何设置用户创建的对象的默认权限
另一个问题，如何设置用户新建的对象的默认权限?
在PostgreSQL 9.0以后新加的语法：
http://www.postgresql.org/docs/9.5/static/sql-alterdefaultprivileges.html
例如
ALTER DEFAULT PRIVILEGES
[ FOR { ROLE | USER } target_role [, ...] ]
[ IN SCHEMA schema_name [, ...] ]
abbreviated_grant_or_revokewhere abbreviated_grant_or_revoke is one of:GRANT { { SELECT | INSERT | UPDATE | DELETE | TRUNCATE | REFERENCES | TRIGGER }
[, ...] | ALL [ PRIVILEGES ] } ON TABLES
TO { [ GROUP ] role_name | PUBLIC } [, ...] [ WITH GRANT OPTION ]
例子：
将digoal用户未来在public下面创建的表的select,update权限默认赋予给test用户.
postgres=> alter default privileges for role digoal in schema public grant select,update on tables to test; ALTER DEFAULT PRIVILEGES
将test用户未来在public,digoal下面创建的表的select,update权限默认赋予给digoal用户.
postgres=# alter default privileges for role test in schema public,digoal grant select,update on tables to digoal; ALTER DEFAULT PRIVILEGES
查看已经赋予的默认权限
postgres=> \ddp+ Default access privileges Owner | Schema | Type | Access privileges ----------+--------+-------+--------------------------- digoal | public | table | test=rw/digoal test | digoal | table | digoal=rw/test test | public | table | digoal=rw/test
或
SELECT pg_catalog.pg_get_userbyid(d.defaclrole) AS "Owner", n.nspname AS "Schema", CASE d.defaclobjtype WHEN 'r' THEN 'table' WHEN 'S' THEN 'sequence' WHEN 'f' THEN 'function' WHEN 'T' THEN 'type' END AS "Type", pg_catalog.array_to_string(d.defaclacl, E'\n') AS "Access privileges"FROM pg_catalog.pg_default_acl d LEFT JOIN pg_catalog.pg_namespace n ON n.oid = d.defaclnamespaceORDER BY 1, 2, 3; Owner | Schema | Type | Access privileges ----------+--------+-------+--------------------------- digoal | public | table | test=rw/digoal postgres | | table | postgres=arwdDxt/postgres+ | | | digoal=arwdDxt/postgres test | digoal | table | digoal=rw/test test | public | table | digoal=rw/test (4 rows)
如何定制批量管理权限
将"指定用户" owne 的表、视图、物化视图的"指定权限"赋予给"指定用户"，并排除"指定对象"
这个需求需要写一个函数来完成，如下
create or replace function g_or_v ( g_or_v text, -- 输入 grant or revoke 表示赋予或回收 own name, -- 指定用户 owner target name, -- 赋予给哪个目标用户 grant privilege to who? objtyp text, -- 对象类别: 表, 物化视图, 视图 object type 'r', 'v' or 'm', means table,view,materialized view exp text[], -- 排除哪些对象, 用数组表示, excluded objects priv text -- 权限列表, privileges, ,splits, like 'select,insert,update') returns void as $$ declare nsp name; rel name; sql text; tmp_nsp name := '';begin for nsp,rel in select t2.nspname,t1.relname from pg_class t1,pg_namespace t2 where t1.relkind=objtyp and t1.relnamespace=t2.oid and t1.relowner=(select oid from pg_roles where rolname=own) loop if (tmp_nsp = '' or tmp_nsp <> nsp) and lower(g_or_v)='grant' then -- auto grant schema to target user sql := 'GRANT usage on schema "'||nsp||'" to '||target; execute sql; raise notice '%', sql; end if; tmp_nsp := nsp; if (exp is not null and nsp||'.'||rel = any (exp)) then raise notice '% excluded % .', g_or_v, nsp||'.'||rel; else if lower(g_or_v) = 'grant' then sql := g_or_v||' '||priv||' on "'||nsp||'"."'||rel||'" to '||target ; elsif lower(g_or_v) = 'revoke' then sql := g_or_v||' '||priv||' on "'||nsp||'"."'||rel||'" from '||target ; else raise notice 'you must enter grant or revoke'; end if; raise notice '%', sql; execute sql; end if; end loop;end; $$ language plpgsql;
例子
将digoal用户的所有表(除了'public.test'和'public.abc')的select, update权限赋予给test用户.
postgres=# select g_or_v('grant', 'digoal', 'test', 'r', array['public.test', 'public.abc'], 'select, update');NOTICE: GRANT usage on schema "public" to testNOTICE: grant select, update on "public"."tb1l" to testNOTICE: grant select, update on "public"."new" to test
g_or_v
--------
(1 row)
postgres=# \dp+ public.tb1l
Access privileges
Schema | Name | Type | Access privileges | Column privileges | Policies
--------+------+-------+-------------------+-------------------+----------
public | tb1l | table | test=rw/digoal | | (1 row)
postgres=# \dp+ public.new
Access privileges
Schema | Name | Type | Access privileges | Column privileges | Policies
--------+------+-------+-----------------------+-------------------+----------
| | | test=rw/digoal | | (1 row)
从 test 用户回收digoal用户的所有表(除了'public.test'和'public.abc')的update权限.
postgres=# select g_or_v('revoke', 'digoal', 'test', 'r', array['public.test', 'public.abc'], 'update');NOTICE: revoke update on "public"."tb1l" from testNOTICE: revoke update on "public"."new" from test
g_or_v
--------
(1 row)
postgres=# \dp+ public.tb1l
Access privileges
Schema | Name | Type | Access privileges | Column privileges | Policies
--------+------+-------+-------------------+-------------------+----------
public | tb1l | table | test=r/digoal | | (1 row)
postgres=# \dp+ public.new
Access privileges
Schema | Name | Type | Access privileges | Column privileges | Policies
--------+------+-------+-----------------------+-------------------+----------
| | | test=r/digoal | | (1 row)
