From: "hatman" <joel.winteregg@gmail.com>
Subject: Re: Insert performance
Date: 6 Mar 2007 07:38:25 -0800
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Cc: "Andreas Kostyrka" <andreas@kostyrka.org>,
	"Richard Huxton" <dev@archonet.com>
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To: pgsql-performance@postgresql.org

Hi Andreas,

Thanks for the info about COPY !!

On Mar 6, 1:23 pm, andr...@kostyrka.org (Andreas Kostyrka) wrote:
> * Richard Huxton <d...@archonet.com> [070306 12:22]:> >>2. You can do a C=
OPY from libpq - is it really not possible?
>
> > >Not really but i have been testing it and inserts are flying (about
> > >100000 inserts/sec) !!
>
> > What's the problem with the COPY? Could you COPY into one table then in=
sert from that to your target table?
>
> Well, there are some issues. First your client needs to support it.
> E.g. psycopg2 supports only some specific CSV formatting in it's
> methods. (plus I had sometimes random psycopg2 crashes, but guarding agai=
nst
> these is cheap compared to the speedup from COPY versus INSERT)
> Plus you need to be sure that your data will apply cleanly (which in
> my app was not the case), or you need to code a fallback that
> localizes the row that doesn't work.
>
> And the worst thing is, that it ignores RULES on the tables, which
> sucks if you use them ;) (e.g. table partitioning).

Ok, but what about constraints (foreign keys and SERIAL id) using a
copy statement ? do we need to handle auto-generated id (SERIAL)
manually ?

Thanks for your feedback.

Regards,

Jo=EBl