| From: | Pavel Stehule <pavel(dot)stehule(at)gmail(dot)com> |
|---|---|
| To: | Fabien COELHO <coelho(at)cri(dot)ensmp(dot)fr> |
| Cc: | Daniel Verite <daniel(at)manitou-mail(dot)org>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Corey Huinker <corey(dot)huinker(at)gmail(dot)com>, Greg Stark <stark(at)mit(dot)edu>, Erik Rijkers <er(at)xs4all(dot)nl>, Robert Haas <robertmhaas(at)gmail(dot)com>, Jim Nasby <Jim(dot)Nasby(at)bluetreble(dot)com>, PostgreSQL <pgsql-hackers(at)postgresql(dot)org>, pgsql-hackers-owner(at)postgresql(dot)org |
| Subject: | Re: \if, \elseif, \else, \endif (was Re: PSQL commands: \quit_if, \quit_unless) |
| Date: | 2017-02-23 19:55:54 |
| Message-ID: | CAFj8pRBaYzijP13AZqXbPwC-9uwuCbzRt5H3moscNESsw0hTOw@mail.gmail.com |
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| Lists: | pgsql-hackers |
2017-02-23 18:52 GMT+01:00 Fabien COELHO <coelho(at)cri(dot)ensmp(dot)fr>:
>
> Hello Daniel,
>
> Ah, I see why *that* wants to know about it ... I think. I suppose you're
>>> arguing that variable expansion shouldn't be able to insert, say, an
>>> \else
>>> in a non-active branch? Maybe, but if it can insert an \else in an
>>> active
>>> branch, then why not non-active too? Seems a bit inconsistent.
>>>
>>
>> Are we sold on the idea that conditionals should be implemented
>> by meta-commands, rather than for example terminal symbols of
>> a new grammar on top of the existing?
>>
>
> I would say that this already exists server-side, and it is named
> PL/pgSQL:-)
>
> I think that once psql has started with \xxx commands, then client-side
> extensions must stick with it till the end of time.
+1
we don't need strong client side scripting language - it should be just
simple.
Pavel
>
>
> --
> Fabien.
>
>
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