Re: [HACKERS] extension for sql update

From: "Florian G(dot) Pflug" <fgp(at)phlo(dot)org>
To: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: Susanne Ebrecht <miracee(at)miracee(dot)de>, pgsql-hackers(at)postgresql(dot)org, pgsql-patches(at)postgresql(dot)org
Subject: Re: [HACKERS] extension for sql update
Date: 2006-07-27 15:42:19
Message-ID: 44C8DEDB.9080408@phlo.org
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Tom Lane wrote:
> Susanne Ebrecht <miracee(at)miracee(dot)de> writes:
>> ... We could provide the mixed update syntax and leave the
>> typed row value expression for the next release. Do you agree?
>
> I don't really see the point --- the patch won't provide any new
> functionality in anything like its current form, because you can
> always just write the separate expressions in the simple one to
> one way. If we do offer the row-on-the-left syntax then people
> will try to put sub-selects on the right, and won't get anything
> beyond an unhelpful "syntax error" message. So my vote would be
> to leave it alone until we have a more complete implementation.

It has the advantage that inserts and updates look more "alike".
If your sql statements are generated by code, then that removes
the need of a special case for updates.

greetings, Florian Pflug

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