grant select on all tables in schema public to username;

此句是有效的复制语句

PG中有schema的概念,

以下的语句就是不行

postgresql 赋权语句 grant的正确使用说明

网上得来终觉浅,错误比较多,还是要自己试试才行。

补充:postgresql关于访问视图需要的权限

某个用户访问一个视图,这个用户需要具备这个视图的schema的usage和这个视图本身的select权限,如果视图的基表来自其他schema,可能还需要其他schema的usage权限(根据postgresql改造的redshift发现了此问题),但是这个用户不需要视图对应基表的select权限

如果基表被修改了或重建了,需要把基表重新赋权给视图的owner,否则视图无法生效,但是不需要把基表授权给需要访问视图的用户,比如视图view1的owner是viewowner,一个用户user1有访问view1的权限,一旦view1的基本table1被重建了,需要把基表table1的权限重新赋给viewowner,但是不需要把table1的权限重新赋给uers1

案例1:

用户u2访问s2.view1,用户u2只需要s2的usage权限和s2.view1的select权限,而不需要s2.view1基表s1.table1的select权限和对应schema s1的usage权限

t1=# \c
You are now connected to database “t1” as user “postgres”
t1=# \dns
List of schemas
Name | Owner
--------±---------
public | postgres
s1 | postgres
s2 | postgres
(3 rows)
t1=# create user u1 password ‘123456';
CREATE ROLE
t1=# create user u2 password ‘123456';
CREATE ROLE
t1=# grant all privileges on schema s1 to u1;
GRANT
t1=# grant all privileges on schema s2 to u1;
GRANT
t1=# \c - u1
You are now connected to database “t1” as user “u1”.
t1=> create table s1.table1(hid int);
CREATE TABLE
t1=> create view s2.view1 as select * from s1.table1;
CREATE VIEW
t1=> \c - u2
You are now connected to database “t1” as user “u2”.
t1=> select * from s2.view1;
ERROR: permission denied for schema s2
LINE 1: select * from s2.view1;
t1=> \c - postgres
You are now connected to database “t1” as user “postgres”.
t1=# grant usage on schema s2 to u2;
GRANT
t1=# \c - u2
You are now connected to database “t1” as user “u2”.
t1=> select * from s2.view1;
ERROR: permission denied for view view1
t1=> \c - postgres
You are now connected to database “t1” as user “postgres”.
t1=# grant select on s2.view1 to u2;
t1=# \c - u2
You are now connected to database “t1” as user “u2”.
t1=> select * from s2.view1;
hid
(0 rows)

案例2:

redshift数据库,用户lukes访问cl_crm.v_account,用户lukes不仅需要cl_crm的usage权限和cl_crm.v_account的select权限,还需要cl_crm.v_account基表对应schema的usage权限,但是不需要基表raw_wam.ibdwsurvey、raw_c3.ibdwsurveyinfo的select权限

创建用户lukes,并授权用户拥有视图cl_crm.v_account对应schema的usage权限

create user lukes password ‘X123_x123'
grant usage on schema cl_crm to lukes

lukes用户查询cl_crm.v_account视图报错

select * from cl_crm.v_account limit 1
Amazon Invalid operation: permission denied for schema raw_wam;
1 statement failed.

对用户lukes授权usage在视图基表对应的schema上

grant usage on schema raw_wam to lukes
grant usage on schema raw_c3 to lukes

lukes用户查询cl_crm.v_account视图继续报错

Amazon Invalid operation: permission denied for relation v_account;

对用户lukes授权访问视图的select权限

grant select on table cl_crm.v_account to lukes

lukes用户查询cl_crm.v_account正常了

cl_crm.v_account视图语句是

CREATE or replace view cl_crm.v_account as with userids as (
select distinct su.ibsu_userid from raw_wam.ibdwsurvey su
left join raw_c3.ibdwsurveyinfo si …)

以上为个人经验,希望能给大家一个参考,也希望大家多多支持。如有错误或未考虑完全的地方,望不吝赐教。

广告合作:本站广告合作请联系QQ:858582 申请时备注:广告合作(否则不回)
免责声明:本站资源来自互联网收集,仅供用于学习和交流,请遵循相关法律法规,本站一切资源不代表本站立场,如有侵权、后门、不妥请联系本站删除!

RTX 5090要首发 性能要翻倍!三星展示GDDR7显存

三星在GTC上展示了专为下一代游戏GPU设计的GDDR7内存。

首次推出的GDDR7内存模块密度为16GB,每个模块容量为2GB。其速度预设为32 Gbps(PAM3),但也可以降至28 Gbps,以提高产量和初始阶段的整体性能和成本效益。

据三星表示,GDDR7内存的能效将提高20%,同时工作电压仅为1.1V,低于标准的1.2V。通过采用更新的封装材料和优化的电路设计,使得在高速运行时的发热量降低,GDDR7的热阻比GDDR6降低了70%。