It's rumoured that Hiroshi Inoue once said:
>> -----Original Message-----
>> From: Dave Page
>>
>> > -----Original Message-----
>> > From: Hiroshi Inoue [mailto:Inoue(at)tpf(dot)co(dot)jp]
>> > Sent: 13 March 2003 10:04
>> > To: Dave Page
>> > Cc: tgl(at)sss(dot)pgh(dot)pa(dot)us; ZeugswetterA(at)spardat(dot)at;
>> > pgman(at)candle(dot)pha(dot)pa(dot)us; pgsql-hackers(at)postgresql(dot)org;
>> > pgsql-interfaces(at)postgresql(dot)org
>> > Subject: Re: [HACKERS] Roadmap for FE/BE protocol redesign
>> >
>> >
>> > Dave Page wrote:
>> > >
>> > > It's rumoured that Hiroshi Inoue once said:
>> > > >
>> > > > Does looking up by the catalog keys take no cost ?
>> > >
>> > > Obviously there is cost, but doing a lookup only on demand,
>> > has got to
>> > > be cheaper in the long run than including the entire column
>> > definition
>> > > in the message whether it's wanted or not?
>> >
>> > So if there are 100 fields, should we ask the backend
>> > the column name 100 times ?
>>
>> No, the column name is there already.
>
> The column name isn't there. If a field has its alias name the alias is
> there.
Ahh yes, you're right of course. The docs are a little sketchy on that
detail
(http://www.postgresql.org/docs/view.php?version=7.3&idoc=1&file=protocol-message-formats.html).
Regards, Dave