Re: proposal: tuplestore, tuplesort aggregate functions

On Wed, Aug 18, 2010 at 04:10:18PM +0200, Pavel Stehule wrote:
> 2010/8/18 David Fetter <david@fetter.org>:
> > Which median do you plan to implement?  Or do you plan to implement
> > several different medians, each with distinguishing names?
> 
> my proposal enabled implementation of any "median like" function. But
> if we implement median as special case of aggregate, then some basic
> "median" will be implemented.

Apart from the medians, which "median-like" aggregates do you have in
mind to start with?  If you can provide examples of "median-like"
aggregates that people might need to implement as user-defined
aggregates, or other places where people would use this machinery, it
will make your case stronger for this refactoring.

Otherwise, it seems like a more reasonable thing to make the medians
special case code.

Cheers,
David.
-- 
David Fetter <david@fetter.org> http://fetter.org/
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