| From: | Robert Haas <robertmhaas(at)gmail(dot)com> |
|---|---|
| To: | Tomas Vondra <tomas(dot)vondra(at)2ndquadrant(dot)com> |
| Cc: | David Fetter <david(at)fetter(dot)org>, Dean Rasheed <dean(dot)a(dot)rasheed(at)gmail(dot)com>, Alvaro Herrera <alvherre(at)2ndquadrant(dot)com>, PostgreSQL Hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: multivariate statistics (v24) |
| Date: | 2017-03-04 07:03:32 |
| Message-ID: | CA+TgmobCm3AjpoSfH1=U1r1e_bJ+mSrq3ZSXy1-RnPuaF9ZvvA@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Thu, Mar 2, 2017 at 8:35 AM, Tomas Vondra
<tomas(dot)vondra(at)2ndquadrant(dot)com> wrote:
> attached is v24 of the patch series, addressing most of the reported issues
> and comments (at least I believe so). The main changes are:
>
> 1) I've mostly abandoned the "multivariate" name in favor of "extended",
> particularly in places referring to stats stored in the pg_statistic_ext in
> general. "Multivariate" is now used only in places talking about particular
> types (e.g. multivariate histograms).
>
> The "extended" name is more widely used for this type of statistics, and the
> assumption is that we'll also add other (non-multivariate) types of
> statistics - e.g. statistics on custom expressions, or some for of join
> statistics.
Oh, I like that. I found it hard to wrap my head around what
"multivariate" was supposed to mean, exactly. I think "extended" will
be clearer.
--
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company
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