| From: | Corey Huinker <corey(dot)huinker(at)gmail(dot)com> |
|---|---|
| To: | Fabien COELHO <coelho(at)cri(dot)ensmp(dot)fr> |
| Cc: | Pavel Stehule <pavel(dot)stehule(at)gmail(dot)com>, Greg Stark <stark(at)mit(dot)edu>, Daniel Verite <daniel(at)manitou-mail(dot)org>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, PostgreSQL Developers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Variable substitution in psql backtick expansion |
| Date: | 2017-04-11 13:50:34 |
| Message-ID: | CADkLM=fKTp39o1HXk9Or_0LWb=+zarKuF3ja08EZEbzcQJ_9yg@mail.gmail.com |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-hackers |
On Tue, Apr 11, 2017 at 2:56 AM, Fabien COELHO <coelho(at)cri(dot)ensmp(dot)fr> wrote:
>
> Hello Pavel,
>
> I think so some local expression evaluation could be - but it should not be
>> placed in \if statement
>>
>
> Why?
>
> \expr issupported :VERSION_NUM >= 10000
>>
>
> Hmmm. Although I do not buy this, it could work as a replacement for \set
> which it seems cannot be upgraded because some people may rely on it to
> just store whatever comes after it in a variable.
>
I have no strong opinion on how expressive expressions should be, but
having a separate \expr (or \setexpr, etc) gives us a green field to
develop them.
| From | Date | Subject | |
|---|---|---|---|
| Next Message | Tom Lane | 2017-04-11 13:53:21 | Re: Reversed sync check in pg_receivewal |
| Previous Message | Robert Haas | 2017-04-11 13:45:28 | Re: GSOC'17 project introduction: Parallel COPY execution with errors handling |