grant select on all tables in schema public to username;
此句是有效的復制語句
PG中有schema的概念，
以下的語句就是不行
網上得來終覺淺，錯誤比較多，還是要自己試試才行。
補充：postgresql關于訪問視圖需要的權限
某個用戶訪問一個視圖，這個用戶需要具備這個視圖的schema的usage和這個視圖本身的select權限，如果視圖的基表來自其他schema，可能還需要其他schema的usage權限(根據postgresql改造的redshift發現了此問題)，但是這個用戶不需要視圖對應基表的select權限
如果基表被修改了或重建了，需要把基表重新賦權給視圖的owner，否則視圖無法生效，但是不需要把基表授權給需要訪問視圖的用戶，比如視圖view1的owner是viewowner，一個用戶user1有訪問view1的權限，一旦view1的基本table1被重建了，需要把基表table1的權限重新賦給viewowner，但是不需要把table1的權限重新賦給uers1
案例1：
用戶u2訪問s2.view1,用戶u2只需要s2的usage權限和s2.view1的select權限，而不需要s2.view1基表s1.table1的select權限和對應schema s1的usage權限
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數據庫，用戶lukes訪問cl_crm.v_account,用戶lukes不僅需要cl_crm的usage權限和cl_crm.v_account的select權限，還需要cl_crm.v_account基表對應schema的usage權限，但是不需要基表raw_wam.ibdwsurvey、raw_c3.ibdwsurveyinfo的select權限
創建用戶lukes,并授權用戶擁有視圖cl_crm.v_account對應schema的usage權限
create user lukes password ‘X123_x123'
grant usage on schema cl_crm to lukes
lukes用戶查詢cl_crm.v_account視圖報錯
select * from cl_crm.v_account limit 1
Amazon Invalid operation: permission denied for schema raw_wam;
1 statement failed.
對用戶lukes授權usage在視圖基表對應的schema上
grant usage on schema raw_wam to lukes
grant usage on schema raw_c3 to lukes
lukes用戶查詢cl_crm.v_account視圖繼續報錯
Amazon Invalid operation: permission denied for relation v_account;
對用戶lukes授權訪問視圖的select權限
grant select on table cl_crm.v_account to lukes
lukes用戶查詢cl_crm.v_account正常了
cl_crm.v_account視圖語句是
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 …)
以上為個人經驗，希望能給大家一個參考，也希望大家多多支持腳本之家。如有錯誤或未考慮完全的地方，望不吝賜教。
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