From: | Jeff Davis <pgsql(at)j-davis(dot)com> |
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To: | Robert Haas <robertmhaas(at)gmail(dot)com> |
Cc: | Daniel Farina <drfarina(at)acm(dot)org>, Greg Smith <greg(at)2ndquadrant(dot)com>, Simon Riggs <simon(at)2ndquadrant(dot)com>, Hannu Krosing <hannu(at)krosing(dot)net>, Daniel Farina <dfarina(at)truviso(dot)com>, pgsql-hackers(at)postgresql(dot)org |
Subject: | Re: [PATCH 4/4] Add tests to dblink covering use of COPY TO FUNCTION |
Date: | 2009-12-30 03:21:13 |
Message-ID: | 1262143273.22866.3324.camel@jdavis |
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Lists: | pgsql-hackers |
On Tue, 2009-12-29 at 21:48 -0500, Robert Haas wrote:
> Anyway, my specific reaction to your suggestions in the email that I
> quoted is that it seems a bit baroque and that I'm not really sure
> what it's useful for in practice. I'm certainly not saying it ISN'T
> useful, because I can't believe that you would have gone to the
> trouble to work through all of this unless you had some ideas about
> nifty things that could be done with it, but I think maybe we need to
> back up and start by talking about the problems you're trying to
> solve, before we get too far down into a discussion of implementation
> details. It doesn't appear to me that's been discussed too much so
> far, although there's enough enthusiasm here to make me suspect that
> other people may understand it better than I do.
Dan made the use case fairly clear:
"I have extended COPY to support using a UDF as a target instead of the
normal 'file' or STDOUT targets. This dovetails nicely with a couple
of extensions I have also written for dblink for the purposes of
enabling direct cross-node bulk loading and replication."
http://archives.postgresql.org/pgsql-hackers/2009-11/msg01555.php
David Fetter had some ideas as well:
http://archives.postgresql.org/pgsql-hackers/2009-11/msg01826.php
Regards,
Jeff Davis
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