From: Bruce Momjian <pgman@candle.pha.pa.us>
Message-Id: <200303062021.h26KLof27347@candle.pha.pa.us>
Subject: Re: Copy from a SELECT
In-Reply-To: <NFBBILEJLCBGFCLICKKMMEMKCJAA.val@webtribe.net>
To: Valerie Goodman <val@webtribe.net>
Date: Thu, 6 Mar 2003 15:21:50 -0500 (EST)
Cc: Christoph Haller <ch@rodos.fzk.de>, pgsql-sql@postgresql.org
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I would suggest creating a view and copying that, but views can't be
copied.

The basic limitation is that COPY deals with data at the heap level,
rather than as a query result/source.  Of course, this is done to make
it fast.

---------------------------------------------------------------------------

Valerie Goodman wrote:
> That's exactly what I don't want to do.
> 
> I've got *very* limited HDD space for the amount of information I need to
> copy out.  The place to where the CSV file is would be output is NTFS and
> from the Postgres documentation, it states that I should not put the table
> oid files there and link in order to free up space in the default drive.
> 
> I've tried using \o to stream the output to a file on the NTFS area, but the
> machine ran out of memory (memory = 2G).
> 
> I was looking for a work around to copy out the section of data I wanted to
> a temporary table and then copy that table out .....
> 
> 
> 
> -----Original Message-----
> From: pgsql-sql-owner@postgresql.org
> [mailto:pgsql-sql-owner@postgresql.org]On Behalf Of Christoph Haller
> Sent: 27 February 2003 12:45
> To: pgsql-sql@postgresql.org
> Cc: val@webtribe.net
> Subject: Re: [SQL] Copy from a SELECT
> 
> 
> >
> > I know that the COPY command requires that you work with plain
> > tables.
> >
> > Is there any other way at all of export only part of a table
> >
> What about
> CREATE [ possibly TEMPORARY ]TABLE table_name AS <your-query>
> and then COPY ...
> 
> Regards, Christoph
> 
> 
> 
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