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From: Dominique Devienne <ddevienne@gmail.com>
Date: Mon, 23 Sep 2024 15:08:47 +0200
Message-ID: <CAFCRh-_BR4QKqTy4AnoTgGE+AiYjAsE1BJ9KPmxU-5vNQ0h+8Q@mail.gmail.com>
Subject: Re: Customize psql prompt to show current_role
To: Laurenz Albe <laurenz.albe@cybertec.at>
Cc: Erik Wienhold <ewie@ewie.name>, Asad Ali <asadalinagri@gmail.com>, pgsql-general@postgresql.org
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On Mon, Sep 23, 2024 at 3:05=E2=80=AFPM Laurenz Albe <laurenz.albe@cybertec=
.at> wrote:
> On Mon, 2024-09-23 at 14:59 +0200, Dominique Devienne wrote:
> > On Mon, Sep 23, 2024 at 2:51=E2=80=AFPM Erik Wienhold <ewie@ewie.name> =
wrote:
> > > You could instead use this:
> > >
> > >     SELECT current_role \gset
> > >     \set PROMPT1 '%n@%/ (%:current_role:)=3D%# '
> > >
> > > 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 prom=
pt.
>
> 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