Re: Added missing tab completion for alter subscription set option

On Tue, May 18, 2021 at 9:20 PM Alvaro Herrera <alvherre(at)alvh(dot)no-ip(dot)org> wrote:
>
> On 2021-May-14, vignesh C wrote:
>
> > While I was reviewing one of the logical decoding features, I found
> > Streaming and binary options were missing in tab completion for the
> > alter subscription set option, the attached patch has the changes for
> > the same.
> > Thoughts?
>
> I wish we didn't have to keep knowledge in the psql source on which
> option names are to be used for each command. If we had some function
> SELECT pg_completion_options('alter subscription set');
> that returned the list of options usable for each command, we wouldn't
> have to ... psql would just retrieve the list of options for the current
> command.
>
> Maintaining such a list does not seem hard -- for example we could just
> have a function alongside parse_subscription_option() that returns the
> names that are recognized by that one. If we drive the implementation
> of both off a single struct, it would never be outdated.
>

I like the idea of maintaining a common list, that will also prevent
options getting missed in the future. I will work on this and provide
a patch for it.

Regards,
Vignesh