Re: PostgreSQL Security/Roles/Grants

On 2009-11-01, Andrew Hall <andrewah(at)hotmail(dot)com> wrote:

> 1. Default Roles -> a role which is activated at login time. Oracle imposes=
> a limit on the number of default roles which any given user can have.
>
> 2. Non-default role -> a role which has to be explicitly activated during t=
> he lifecycle of an application in order to gain access to database resource=
> s. There are no limits on the number of non-default roles. This type of rol=
> e helps us to only provide a user with the minimal set of privileges that t=
> hey require at any given time=2C and minimise their access to database reso=
> urces.

the only way I know of to provide anything like non-default roles is
via functions declared with "security definer"

> Secondly=2C is there a limit on the number of roles which can be assigned t=
> o a user (or more accurately a 'login role') in postgreSQL?

no (2^16 maybe??) IIRC you do hit an complexity limit, O(n^2) or worse.