Re: Customize psql prompt to show current_role

On Mon, Sep 23, 2024 at 3:05 PM Laurenz Albe <laurenz(dot)albe(at)cybertec(dot)at> wrote:
> On Mon, 2024-09-23 at 14:59 +0200, Dominique Devienne wrote:
> > On Mon, Sep 23, 2024 at 2:51 PM Erik Wienhold <ewie(at)ewie(dot)name> wrote:
> > > You could instead use this:
> > >
> > > SELECT current_role \gset
> > > \set PROMPT1 '%n(at)%/ (%:current_role:)=%# '
> > >
> > > But that won't work with subsequent SET ROLE commands.
> >
> > Bummer... That was kinda the point, that it updates automatically.
> >
> > Then I'd like to respectfully request a small enhancement to psql
> > to support a new \r (or some other letter) for current_role in the prompt.
>
> To get the current role, psql would have to query the database whenever
> it displays the prompt. That would be rather expensive...

Hi Laurenz. Sure, although expensive might be a bit strong a word.
But that would be opt-in anyway, so just a small warning in the doc
about that new option would suffice, no? --DD