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Statistical Lacunae in Interval type - Mailing list pgsql-hackers

From David Fetter
Subject Statistical Lacunae in Interval type
Date
Msg-id 20040712061152.GB23679@fetter.org
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Responses Re: Statistical Lacunae in Interval type
Re: Statistical Lacunae in Interval type
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Kind people,

I just ran across this, and was wondering whether it's worth a
back-patch.  The interval type has an aggregate for average (AVG), but
not one for standard deviation (STDDEV) or variance (VARIANCE).

Is this a bug?  Is there some problem with defining variance over
intervals?

TIA for any pointers in the right direction...

Cheers,
D
-- 
David Fetter david@fetter.org http://fetter.org/
phone: +1 510 893 6100   mobile: +1 415 235 3778

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