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Re: Idempotence and "Replication Insensitivity" are equivalent ?

From: Marshall <marshall.spight_at_gmail.com>
Date: 19 Sep 2006 08:14:31 -0700
Message-ID: <1158678871.496274.134890@d34g2000cwd.googlegroups.com> 





Chris Smith wrote:


>

> >  - median

> >  - Any quantile

> >  - standard deviation

> >  - variance

>

> These are not definable as aggregate functions.




They are if you use the accumulator approach. It's
not always clear if efficient implementations exist.




Marshall
Received on Tue Sep 19 2006 - 10:14:31 CDT












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