Re: have you feel anything when you read this ?

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.