| From: | Robert Haas <robertmhaas(at)gmail(dot)com> |
|---|---|
| To: | Pavel Stehule <pavel(dot)stehule(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 20:18:10 |
| Message-ID: | CA+TgmoaU4i-nbiwqaZxte38odw1aA5M3GsVpZrbgfp5EozD84Q@mail.gmail.com |
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| Lists: | pgsql-hackers |
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.
--
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company
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