From: Jim C. Nasby <jnasby@pervasive.com>
To: Tom Lane <tgl@sss.pgh.pa.us>
Cc: Hannu Krosing <hannu@skype.net>
Cc: Neil Conway <neilc@samurai.com>
Cc: Zoltan Boszormenyi <zboszor@dunaweb.hu>
Cc: Andrew Dunstan <andrew@dunslane.net>
Cc: Mark Woodward <pgsql@mohawksoft.com>
Cc: pgsql-hackers@postgresql.org
Subject: Re: [PERFORM] psql -A (unaligned format) eats too much
Date: Tue, 6 Jun 2006 09:39:19 -0500
Message-ID: <20060606143918.GA53487@pervasive.com> (raw)
In-Reply-To: <15738.1149601723@sss.pgh.pa.us>
References: <20512.1149521250@sss.pgh.pa.us>
<20060605155349.GU53487@pervasive.com>
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<18006.24.91.171.78.1149526092.squirrel@mail.mohawksoft.com>
<44845E86.3080001@dunslane.net>
<4484672B.8080606@dunaweb.hu>
<1149529945.5577.5.camel@localhost>
<21820.1149531024@sss.pgh.pa.us>
<1149597013.3818.7.camel@localhost.localdomain>
<15738.1149601723@sss.pgh.pa.us>
On Tue, Jun 06, 2006 at 09:48:43AM -0400, Tom Lane wrote:
> Hannu Krosing <hannu@skype.net> writes:
> > Ãhel kenal päeval, 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@pervasive.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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To: pgsql-performance@postgresql.org
Cc: jnasby@pervasive.com, tgl@sss.pgh.pa.us, hannu@skype.net, neilc@samurai.com, zboszor@dunaweb.hu, andrew@dunslane.net, pgsql@mohawksoft.com, pgsql-hackers@postgresql.org
Subject: Re: [PERFORM] psql -A (unaligned format) eats too much
In-Reply-To: <20060606143918.GA53487@pervasive.com>
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