Re: Support Parallel Query Execution in Executor

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@svana.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.