From: sad <sad@bankir.ru>
To: pgsql-sql@postgresql.org
Subject: Re: perfomance question
Date: Fri, 19 Mar 2004 09:27:43 +0300
Message-ID: <200403190927.43971.sad@bankir.ru> (raw)
In-Reply-To: <200403181038.30116.josh@agliodbs.com>
References: <200403180941.45591.sad@bankir.ru>
<200403181038.30116.josh@agliodbs.com>
On Thursday 18 March 2004 21:38, you wrote:
> Sad,
>
> > what are perfomance difference bitween
> > a) update t1 set f1 = 'x', f2 = 'y';
> > b) update t1 set f1 = 'x', f2 = f2;
> > c) update t1 set f1 = 'x';
> > ?
>
> Not a lot. Why don't you try it?
Really ! why ? :-)
I forgot to ask the second question:
How these updates affect a data storage ?
(does (b) cause physical update of f2 ?)
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To: pgsql-sql@postgresql.org
Cc: sad@bankir.ru
Subject: Re: perfomance question
In-Reply-To: <200403190927.43971.sad@bankir.ru>
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