| From: | Martijn van Oosterhout <kleptog(at)svana(dot)org> |
|---|---|
| To: | Tommy Gildseth <tommy(at)gildseth(dot)com> |
| Cc: | ocean(at)ocean(dot)fraknet(dot)org, pgsql-general(at)postgresql(dot)org |
| Subject: | Re: UPDATE on two large datasets is very slow |
| Date: | 2007-04-04 15:24:32 |
| Message-ID: | 20070404152432.GE22542@svana.org |
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| Thread: | |
| Lists: | pgsql-general |
On Wed, Apr 04, 2007 at 11:34:22AM +0200, Tommy Gildseth wrote:
> >For the record, this is what the SQL MERGE command is for... I don't
> >think anyone is working on implementing that though...
> >
> This will possibly provide a solution to this question:
> http://www.postgresql.org/docs/current/static/plpgsql-control-structures.html#PLPGSQL-UPSERT-EXAMPLE
Almost. Merge will allow you to combine the INSERT and UPDATE into a
single command. It doesn't avoid the race condition though, so you
still need the exception block and the loop.
Have a nice day,
--
Martijn van Oosterhout <kleptog(at)svana(dot)org> http://svana.org/kleptog/
> From each according to his ability. To each according to his ability to litigate.
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