| From: | Pavel Stehule <pavel(dot)stehule(at)gmail(dot)com> |
|---|---|
| To: | Robert Haas <robertmhaas(at)gmail(dot)com> |
| Cc: | "David G(dot) Johnston" <david(dot)g(dot)johnston(at)gmail(dot)com>, Fabien COELHO <coelho(at)cri(dot)ensmp(dot)fr>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Corey Huinker <corey(dot)huinker(at)gmail(dot)com>, Andrew Dunstan <andrew(at)dunslane(dot)net>, PostgreSQL <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: PSQL commands: \quit_if, \quit_unless |
| Date: | 2016-12-16 20:21:39 |
| Message-ID: | CAFj8pRC0LQCpVYDJDXU9V76Vd3rSKGCb0=Ytwv61iYrhPbn1Fg@mail.gmail.com |
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| Lists: | pgsql-hackers |
2016-12-16 21:18 GMT+01:00 Robert Haas <robertmhaas(at)gmail(dot)com>:
> On Fri, Dec 16, 2016 at 12:28 PM, Pavel Stehule <pavel(dot)stehule(at)gmail(dot)com>
> wrote:
> > why do you need special operator for negation? there is only one use
> case.
> > It can be solved by \if_not
>
> That's exactly the kind of thing I *don't* want to do. If you
> absolutely must have that and you can't wait until we get a full-blown
> expression evaluator, then just swap the \if side with the \else side
> and call it good. The whole point here is to avoid introducing weird
> hacks for lack of a full expression evaluator that will just become
> annoyances once we have one.
>
I don't need it. Because we don't expect expression there, then "not" or
"if_not" is not necessary.
Regards
Pavel
>
> --
> Robert Haas
> EnterpriseDB: http://www.enterprisedb.com
> The Enterprise PostgreSQL Company
>
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