From: Stephan Szabo <sszabo@megazone.bigpanda.com>
To: Eugene E. <sad@bankir.ru>
Cc: Peter Eisentraut <peter_e@gmx.net>
Cc: Achilleus Mantzios <achill@matrix.gatewaynet.com>
Cc: pgsql-sql@postgresql.org
Subject: Re: have you feel anything when you read this ?
Date: Wed, 5 Apr 2006 23:24:41 -0700 (PDT)
Message-ID: <20060405224337.Y83930@megazone.bigpanda.com> (raw)
In-Reply-To: <4434A207.6010600@bankir.ru>
References: <Pine.LNX.4.44.0603201522410.22894-100000@matrix.gatewaynet.com>
<441EA0A7.8030601@bankir.ru>
<200603201415.30719.peter_e@gmx.net>
<442CC95C.1030700@bankir.ru>
<20060331084503.W64402@megazone.bigpanda.com>
<44324AB6.2060104@bankir.ru>
<20060404071118.C19036@megazone.bigpanda.com>
<4433650E.1020508@bankir.ru>
<20060405071322.Y58168@megazone.bigpanda.com>
<4434A207.6010600@bankir.ru>
On Thu, 6 Apr 2006, Eugene E. wrote:
> Stephan Szabo wrote:
> > On Wed, 5 Apr 2006, Eugene E. wrote:
> >
> >
> >>Stephan Szabo wrote:
> >>
> >>>On Tue, 4 Apr 2006, Eugene E. wrote:
> >>>
> >>>
> >>>
> >>>>Stephan Szabo wrote:
> >>>>
> >>>>
> >>>>>On Fri, 31 Mar 2006, Eugene E. wrote:
> >>>>>
> >>>>>
> >>>>>
> >>>>>
> >>>>>>Peter Eisentraut wrote:
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>>>Eugene E. wrote:
> >>>>>>>
> >>>>>>>
> >>>>>>>
> >>>>>>>
> >>>>>>>>the problem is: you'll get this four byte sequence '\000' _instead_
> >>>>>>>>of NUL-byte anyway.
> >>>>>>>
> >>>>>>>
> >>>>>>>What you seem to be missing is that PostgreSQL data can be represented
> >>>>>>>in textual and in binary form. What you in psql is the textual form.
> >>>>>>>If you want the binary form you need to select it. Then you can pass
> >>>>>>>the exact bytes back and forth.
> >>>>>>
> >>>>>>your sentence is not true.
> >>>>>>I can not select exact bytes even if i use BYTEA type
> >>>>>
> >>>>>
> >>>>>No, that is still using the textual form. If you use PQexecParams and set
> >>>>>the last argument to show you want binary data, you should get binary
> >>>>>data.
> >>
> >>ok
> >>then i am using PQexecParams
> >>
> >>the following tiny program shows a wonderful lameness...
> >
> >
> > What lameness? The fact that you're trying to use a binary (network order
> > maybe) integer as a string? That's not the fault of PQexecParams but
> > of the code calling it.
>
> You're right !
> That's is not a fault of PQexecParams at all. That's the fault of its
> design.
No, I'd argue in this case that it was the fault of a programmer not
paying enough attention/not thinking through what the api doc says.
>(I pretty know why an integer has been not displayed, but why
> they designed this function that way ? i do not know)
What would you expect it to do given a single result format argument?
If you want to propose a new function (set of functions) that have
different behavior, make a coherent proposal. Statements like it should
do X because I want it to aren't coherent proposals. Expect to get asked
why bytea is special -- why should integer be passed as a string given
that you may often want to do operations on the value which expect it as
an actual number not the string representation of a number.
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To: pgsql-sql@postgresql.org
Cc: sszabo@megazone.bigpanda.com, sad@bankir.ru, peter_e@gmx.net, achill@matrix.gatewaynet.com
Subject: Re: have you feel anything when you read this ?
In-Reply-To: <20060405224337.Y83930@megazone.bigpanda.com>
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