Re: proposal - assign result of query to psql variable

From: David Fetter <david(at)fetter(dot)org>
To: Pavel Stehule <pavel(dot)stehule(at)gmail(dot)com>
Cc: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, PostgreSQL Hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: proposal - assign result of query to psql variable
Date: 2012-07-26 06:36:55
Message-ID: 20120726063655.GB16582@fetter.org
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On Thu, Jul 26, 2012 at 08:31:13AM +0200, Pavel Stehule wrote:
> 2012/7/26 David Fetter <david(at)fetter(dot)org>:
> > On Thu, Jul 26, 2012 at 01:36:17AM -0400, Tom Lane wrote:
> >> Pavel Stehule <pavel(dot)stehule(at)gmail(dot)com> writes:
> >> > \eset variable [, variable [..]] query -- it raise exception when
> >> > more than one row is returned or when no row is returned
> >>
> >> Better would be a variant on \g, that is you type in the query and
> >> then tell it where to put the result. We have learned the hard way
> >> that putting SQL commands into the arguments of backslash commands
> >> is a horrid idea. Maybe
> >>
> >> select x,y,... from ...
> >> \gset var1 var2 ...
> >
> > How about
> >
> > \gset var1,,,var2,var3...
> >
>
> I don't like this - you can use fake variable - and ignoring some
> variable has no big effect on client

Why assign to a variable you'll never use?

Cheers,
David.

P.S. The bike shed should be puce with blaze orange pin-striping.
--
David Fetter <david(at)fetter(dot)org> http://fetter.org/
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