Re: Multi-Dimensional Histograms - Mailing list pgsql-hackers

From Tom Lane
Subject Re: Multi-Dimensional Histograms
Date
Msg-id 1239.1246315415@sss.pgh.pa.us
Whole thread Raw
In response to Re: Multi-Dimensional Histograms  (David Fetter <david@fetter.org>)
Responses Re: Multi-Dimensional Histograms
Re: Multi-Dimensional Histograms
List pgsql-hackers
David Fetter <david@fetter.org> writes:
> On Mon, Jun 29, 2009 at 01:28:01PM -0700, Nathan Boley wrote:
>> ... They dismiss
>> singular value decomposition and the discrete wavelet transform as
>> being too parametric ( which is silly, IMHO )

> Should we have a separate discussion about eigenvalues?  Wavelets?

I think it'd be a short discussion: what will you do with non-numeric
datatypes?  We probably don't really want to assume anything stronger
than that the datatype has a total ordering.
        regards, tom lane


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