granted select works in psql but not via jdbc

I'm trying to set up a system where users will be limited based on their access. To do this I'm querying db_roles and if an exception is thrown, they're not a db admin. The problem is that I've done this:

grant select on pg_roles to db_mid_level_admin;

then any member of the role db_mid_level_admin can query db_roles using psql, but when I try it in jdbc it throws an exception (permission denied for relation pg_roles).

Same user, different behavior in psql vs jdbc. I can't make this admin level superuser because then they'd have access to some stuff they shouldn't. Thanks.

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J. wrote:

> I'm trying to set up a system where users will be limited based on their access. To do this I'm querying db_roles and if an exception is thrown, they're not a db admin. The problem is that I've done this:
>
> grant select on pg_roles to db_mid_level_admin;
^^^^^^^^^
Wouldn't it be db_roles?

--
Euler Taveira de Oliveira
http://www.timbira.com/

db_roles doesn't seem to exist as a table. A lot of tables seem to start with "pg_" if they deal with roles and privileges.

I was able to solve the problem by creating dummy tables that had very specific privileges and catching exceptions to determine what group the user belonged to so I could display the appropriate options. I got the grade on the assignment, but I still don't get why a user could select from pg_roles from the psql prompt, but not via jdbc statements.

Euler Taveira de Oliveira <euler(at)timbira(dot)com> wrote: J. wrote:

> I'm trying to set up a system where users will be limited based on their access. To do this I'm querying db_roles and if an exception is thrown, they're not a db admin. The problem is that I've done this:
>
> grant select on pg_roles to db_mid_level_admin;
^^^^^^^^^
Wouldn't it be db_roles?

--
Euler Taveira de Oliveira
http://www.timbira.com/

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