Re: WIP: default values for function parameters

From: "Pavel Stehule" <pavel(dot)stehule(at)gmail(dot)com>
To: "David E(dot) Wheeler" <david(at)kineticode(dot)com>
Cc: "Tom Lane" <tgl(at)sss(dot)pgh(dot)pa(dot)us>, "Bruce Momjian" <bruce(at)momjian(dot)us>, "Gregory Stark" <stark(at)enterprisedb(dot)com>, "Grzegorz Jaskiewicz" <gj(at)pointblue(dot)com(dot)pl>, "PostgreSQL Hackers" <pgsql-hackers(at)postgresql(dot)org>, "Peter Eisentraut" <peter_e(at)gmx(dot)net>
Subject: Re: WIP: default values for function parameters
Date: 2008-12-12 13:47:42
Message-ID: 162867790812120547l5eaae852q75822c25e0ea4324@mail.gmail.com
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2008/12/12 David E. Wheeler <david(at)kineticode(dot)com>:
> On Dec 12, 2008, at 2:39 PM, Tom Lane wrote:
>
>> So I think that really this is never going to fly unless it uses a
>> keyword-looking reserved word. And we're not going to take some short
>> word that's not reserved now and suddenly make it so. So, despite
>> Pavel's objection that the AS syntax proposal might be confused with
>> other uses of AS, I seriously doubt that any proposal is going to get
>> accepted that doesn't recycle AS or some other existing reserved word.

when I should exactly identify param name, the we should to use any symbols.

>
> I'm okay with AS if that's the way it has to be, but what about a colon
> right at the end of the label? A cast is two colons, so no conflict there:
>
> SELECT foo(1, name: 'bar', quantity: 10);

it's look well, but I still prefer some combination with =

name: = ''
name: => '''
:name = ''
$name => ..
$name = ..

Maybe I am too conservative
Pavel

>
> No doubt I'm missing something…
>
> Best
>
> David

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