Re: [PERFORM] psql -A (unaligned format) eats too much

From: "Jim C(dot) Nasby" <jnasby(at)pervasive(dot)com>
To: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: Hannu Krosing <hannu(at)skype(dot)net>, Neil Conway <neilc(at)samurai(dot)com>, Zoltan Boszormenyi <zboszor(at)dunaweb(dot)hu>, Andrew Dunstan <andrew(at)dunslane(dot)net>, Mark Woodward <pgsql(at)mohawksoft(dot)com>, pgsql-hackers(at)postgresql(dot)org
Subject: Re: [PERFORM] psql -A (unaligned format) eats too much
Date: 2006-06-06 14:39:19
Message-ID: 20060606143918.GA53487@pervasive.com
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On Tue, Jun 06, 2006 at 09:48:43AM -0400, Tom Lane wrote:
> Hannu Krosing <hannu(at)skype(dot)net> writes:
> > hel kenal peval, E, 2006-06-05 kell 14:10, kirjutas Tom Lane:
> >> Note of course that such a thing would push the incomplete-result
> >> problem further upstream. For instance in (hypothetical --cursor
> >> switch)
> >> psql --cursor -c "select ..." | myprogram
> >> there would be no very good way for myprogram to find out that it'd
> >> been sent an incomplete result due to error partway through the SELECT.
>
> > would it not learn about it at the point of error ?
>
> No, it would merely see EOF after some number of result rows. (I'm
> assuming you're also using -A -t so that the output is unadorned.)

So if an error occurs partway through reading a cursor, no error message
is generated? That certainly sounds like a bug to me...
--
Jim C. Nasby, Sr. Engineering Consultant jnasby(at)pervasive(dot)com
Pervasive Software http://pervasive.com work: 512-231-6117
vcard: http://jim.nasby.net/pervasive.vcf cell: 512-569-9461

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