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Re: Best COPY Performance

From: "Craig A(dot) James" <cjames(at)modgraph-usa(dot)com>
To: "Jim C(dot) Nasby" <jim(at)nasby(dot)net>
Cc: Worky Workerson <worky(dot)workerson(at)gmail(dot)com>, Merlin Moncure <mmoncure(at)gmail(dot)com>, pgsql-performance(at)postgresql(dot)org
Subject: Re: Best COPY Performance
Date: 2006-10-25 16:52:14
Message-ID: 453F963E.4010206@modgraph-usa.com (view raw or flat)
Thread:
Lists: pgsql-performance
Jim C. Nasby wrote:
> Wait... so you're using perl to copy data between two tables? And using
> a cursor to boot? I can't think of any way that could be more
> inefficient...
> 
> What's wrong with a plain old INSERT INTO ... SELECT? Or if you really
> need to break it into multiple transaction blocks, at least don't
> shuffle the data from the database into perl and then back into the
> database; do an INSERT INTO ... SELECT with that same where clause.

The data are on two different computers, and I do processing of the data as it passes through the application.  Otherwise, the INSERT INTO ... SELECT is my first choice.

Craig

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