阿里云rds postgres回收用户权限

1，提工单

由于当初设计都是用的public schema，而public schema对所有用户权限没有限制，所以需要回收部分用户的建表权限，

=> dn

list of schemas

name

owner

public

pg2490375

而public 默认owner是初始化实列的用户，所以提供单将public owner改成自己建的用户

将test,template1数据库public schema的owner给xhc_test 。

xhc_test

2，若为rds_superuser 则改为nords_superuser

xhc_dba=> alter user xhc_rw nords_superuser;

3，回收create 权限

xhc_dba=> revoke create on schema public from public;

xhc_dba=> c - xhc_rw;

you are now connected to database "xhc_dba" as user "xhc_rw”. —回收成功

xhc_dba=> create table t000(id serial,id2 bigint);

error: permission denied for schema public

xhc_dba=>

注1

单单回收某个用户的create权限是没有用的，必须回收public的create权限，

hc_dba=> revoke create on schema public from xhc_rw;

revoke

you are now connected to database "xhc_dba" as user "xhc_rw".

xhc_dba=> create t000(id bigint,id2 serial primary key);

xhc_dba=> create table t000(id bigint,id2 serial primary key);

create table

注2

xhc_dba=> c

psql (9.5.2, server 9.4.10)

xhc_dba=> d

schema

type

t000

table

xhc_rw

xhc_dba=> drop table t000;

虽然回收了xhc_rw的create权限，但是xhc_rw对以前建的表还是有ddl，权限的

注3

hc_dba=> c

you are now connected to database "xhc_dba" as user "xhc_test".

xhc_dba=> dn

t11

xhc_dba=> alter table t11 owner to xhc_test;

alter table

xhc_dba=> alter table t11 owner to xhc_rw;

因为回收了所有用户的create权限，所以表的所属权是不可逆的，原来属于xhc_rw的表改成xhc_test之后就不能再改回来了

要想以后xhc_rw对不属于自己的表也有读写权限需要执行以下4句

grant select,insert,update,delete on all tables in schema public to xhc_rw;

warning: no privileges were granted for “test” —因为test表本来就属于xhc_rw用户，所以会有警告，如果把test 表owner改成xhc_test就不会有警告了

xhc_dba=> grant select,usage on all sequences in schema public to xhc_rw;

grant

xhc_dba=> alter default privileges in schema public grant select,update,delete,insert on tables to xhc_rw;

alter default privileges

xhc_dba=> alter default privileges in schema public grant select,usage on sequences to xhc_rw;