Re: dropdb --force

From: Amit Kapila <amit(dot)kapila16(at)gmail(dot)com>
To: Pavel Stehule <pavel(dot)stehule(at)gmail(dot)com>
Cc: Dilip Kumar <dilipbalaut(at)gmail(dot)com>, vignesh C <vignesh21(at)gmail(dot)com>, Ryan Lambert <ryan(at)rustprooflabs(dot)com>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Thomas Munro <thomas(dot)munro(at)gmail(dot)com>, Anthony Nowocien <anowocien(at)gmail(dot)com>, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>, Filip Rembiałkowski <filip(dot)rembialkowski(at)gmail(dot)com>
Subject: Re: dropdb --force
Date: 2019-09-25 02:13:58
Message-ID: CAA4eK1J2MK6BSQYTCqUC9LPMrcdmriicKdMVK0iLtcGPgjUiOg@mail.gmail.com
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On Tue, Sep 24, 2019 at 6:22 PM Amit Kapila <amit(dot)kapila16(at)gmail(dot)com> wrote:
> On Sat, Sep 21, 2019 at 10:09 PM Pavel Stehule <pavel(dot)stehule(at)gmail(dot)com> wrote:
> >
> > Thank you for check. I am sending updated patch
> >
>
> Alvaro has up thread suggested some alternative syntax [1] for this
> patch, but I don't see any good argument to not go with what he has
> proposed. In other words, why we should prefer the current syntax as
> in the patch over what Alvaro has proposed?
>
> IIUC, the current syntax implemented by the patch is:
> Drop Database [(options)] [If Exists] name
> Alvaro suggested using options at the end (and use optional keyword
> WITH) based on what other Drop commands does. I see some merits to
> that idea which are (a) if tomorrow we want to introduce new options
> like CASCADE, RESTRICT then it will be better to have all the options
> at the end as we have for other Drop commands, (b) It will resemble
> more with Create Database syntax.
>
> Now, I think the current syntax is also not bad and we already do
> something like that for other commands like Vaccum where options are
> provided before object_name, but I think in this case putting at the
> end is more appealing unless there are some arguments against that.
>
> One other minor comment:
> +
> + This will also fail, if the connections do not terminate in 5 seconds.
> + </para>
>
> Is there any implementation in the patch for the above note?
>

One more point I would like to add here is that I think it is worth
considering to split this patch by keeping the changes in dropdb
utility as a separate patch. Even though the code is not very much
but I think it can be a separate patch atop the main patch which
contains the core server changes.

--
With Regards,
Amit Kapila.
EnterpriseDB: http://www.enterprisedb.com

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