From: | Martijn van Oosterhout <kleptog(at)svana(dot)org> |
---|---|
To: | Qingqing Zhou <zhouqq(at)cs(dot)toronto(dot)edu> |
Cc: | pgsql-hackers(at)postgresql(dot)org |
Subject: | Re: Support Parallel Query Execution in Executor |
Date: | 2006-04-06 10:41:13 |
Message-ID: | 20060406104112.GB2120@svana.org |
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Lists: | pgsql-hackers pgsql-patches |
On Thu, Apr 06, 2006 at 06:28:33PM +0800, Qingqing Zhou wrote:
> I have written some experimental code of doing master-slave seqscan in
> PostgreSQL. During the work, I feel we had enough infrastructure to support
> parallel query execution.
Good work. One question though, temporary tables. Currently there no
way to get a consistant view of a temporary table from another process.
You probably have to avoid shipping off non-immutable function calls.
Is it possible to deadlock (don't see how, but I may not be looking
hard enough).
Hardest work would be finding what can be safely farmed off.
Nice work though, I hadn't thought of this approach.
Have a nice day,
--
Martijn van Oosterhout <kleptog(at)svana(dot)org> http://svana.org/kleptog/
> Patent. n. Genius is 5% inspiration and 95% perspiration. A patent is a
> tool for doing 5% of the work and then sitting around waiting for someone
> else to do the other 95% so you can sue them.
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