Re: Fwd: [GENERAL] Question about Privileges

[Andreas Wenk]

Jack W schrieb:


On Thu, Mar 12, 2009 at 3:45 PM, John R Pierce > wrote:


Jack W wrote:


I also find that if I only grant privileges on database to
dbuser as below, without granting privileges on Schema and table
to dbuser, dbuser still can not do SELECT on the tables.
mydb=# grant all privileges on Database mydb to dbuser;

Is there any simple way to grant All privileges to dbuser on all
the 10 tables?


the simplest way is to make dbuser the OWNER of the database, and
have him create all the tables too, then he automatically has full
rights to it.



Thanks. In my application, one user will create the database, then other 
users can remotely access it through ODBC/JDBC to access the database. 
In this case, I have to grant the privileges to each user one by one, right?


 



SCHEMA privileges grant the rights to connect to a schema, and
create/modify schemas

table/view/etc privileges grant the rights to
select/insert/update/etc the mentioned tables.


In my test as below:

mydb=#select * from mydb_schema.mydb_table1;

If I only grant the privileges to the table:

mydb=# grant all privileges on mydb_schema.mydb_table1 to dbuser;

The SELECT will fail, the error is:

STATEMENT:  select * from mydb_schema.mydb_table1;
ERROR: permission denied for schema mydb_schema

So I have to grant the privileges to the schema mydb_schema in order to 
do SELECT on mydb_table1.


This is a common "mistake". You have to grant the privileges always also 
to the schema explicit and not just to the table in a schema. PostgreSQL 
is not going so far to warn you, that the user has now the privileges on 
the table but *not* to the schema.


As Adrian allready mentioned, you should use group roles and then grant 
the privileges for the schema to the group role if you have more 
different users ...


Cheers

Andy

--
St.Pauli - Hamburg - Germany

Andreas Wenk


Jack











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Re: Fwd: [GENERAL] Question about Privileges

[Adrian Klaver]

On Thursday 12 March 2009 5:00:39 pm Jack W wrote:
> On Thu, Mar 12, 2009 at 3:45 PM, John R Pierce  wrote:
> > Jack W wrote:
> >> I also find that if I only grant privileges on database to dbuser as
> >> below, without granting privileges on Schema and table to dbuser, dbuser
> >> still can not do SELECT on the tables.
> >> mydb=# grant all privileges on Database mydb to dbuser;
> >>
> >> Is there any simple way to grant All privileges to dbuser on all the 10
> >> tables?
> >
> > the simplest way is to make dbuser the OWNER of the database, and have
> > him create all the tables too, then he automatically has full rights to
> > it.
>
> Thanks. In my application, one user will create the database, then other
> users can remotely access it through ODBC/JDBC to access the database. In
> this case, I have to grant the privileges to each user one by one, right?

Easier to create a group role and assign it the privileges to the tables as you 
create them. Then as you create users assign them to the group.

>
> > SCHEMA privileges grant the rights to connect to a schema, and
> > create/modify schemas
> >
> > table/view/etc privileges grant the rights to select/insert/update/etc
> > the mentioned tables.
> >
> >
> > In my test as below:
>
> mydb=#select * from mydb_schema.mydb_table1;
>
> If I only grant the privileges to the table:
> mydb=# grant all privileges on mydb_schema.mydb_table1 to dbuser;
>
> The SELECT will fail, the error is:
>
> STATEMENT:  select * from mydb_schema.mydb_table1;
> ERROR: permission denied for schema mydb_schema
>
> So I have to grant the privileges to the schema mydb_schema in order to do
> SELECT on mydb_table1.
>
> Jack



-- 
Adrian Klaver
akla...@comcast.net

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