Re: PoC/WIP: Extended statistics on expressions

From: Alvaro Herrera <alvherre(at)alvh(dot)no-ip(dot)org>
To: Justin Pryzby <pryzby(at)telsasoft(dot)com>
Cc: Dean Rasheed <dean(dot)a(dot)rasheed(at)gmail(dot)com>, Tomas Vondra <tomas(dot)vondra(at)enterprisedb(dot)com>, pgsql-hackers(at)postgresql(dot)org
Subject: Re: PoC/WIP: Extended statistics on expressions
Date: 2021-03-24 19:50:24
Message-ID: 20210324195024.GA22941@alvherre.pgsql
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On 2021-Mar-24, Justin Pryzby wrote:

> On Wed, Mar 24, 2021 at 05:15:46PM +0000, Dean Rasheed wrote:

> > Hmm, I think "univariate" and "multivariate" are pretty ubiquitous,
> > when used to describe statistics. You could use "single-column" and
> > "multi-column", but then "column" isn't really right anymore, since it
> > might be a column or an expression. I can't think of any other terms
> > that fit.

Agreed. If we need to define the term, we can spend a sentence or two
in that.

> We already use "multivariate", just not in create-statistics.sgml

> So I think the answer is for create-statistics to expose that word in a
> user-facing way in its reference to multivariate-statistics-examples.

+1

--
Álvaro Herrera Valdivia, Chile

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