Re: pg_signal_backend() asymmetry

I'm marking this patch Ready for Committer.  I suggest backpatching it to 9.2;
the patch corrects an oversight in 9.2 changes.  There's more compatibility
value in backpatching than in retaining distinct behavior for 9.2 only.

On Thu, Jun 28, 2012 at 09:32:41AM -0700, Josh Kupershmidt wrote:
> !     if (!superuser())
>       {
>           /*
> !          * Since the user is not superuser, check for matching roles.
>            */
> !         if (proc->roleId != GetUserId())
> !             return SIGNAL_BACKEND_NOPERMISSION;
>       }

I would have collapsed the conditionals and deleted the obvious comment:
if (!(superuser() || proc->roleId == GetUserId()))    return SIGNAL_BACKEND_NOPERMISSION;

The committer can do that if desired; no need for another version.

Thanks,
nm