Re: multivariate statistics v14 - Mailing list pgsql-hackers

From Simon Riggs
Subject Re: multivariate statistics v14
Date
Msg-id CANP8+j+HZTnnBFxEVvi_qCOTs6a8x+HjjS=q+uy9cAQrLup5vw@mail.gmail.com
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In response to Re: multivariate statistics v14  (Tatsuo Ishii <ishii@postgresql.org>)
Responses Re: multivariate statistics v14  (Tomas Vondra <tomas.vondra@2ndquadrant.com>)
List pgsql-hackers
On 9 April 2016 at 18:37, Tatsuo Ishii <ishii@postgresql.org> wrote:
> But I still think it wouldn't move the patch any closer to committable
> state, because what it really needs is review whether the catalog
> definition makes sense, whether it should be more like pg_statistic,
> and so on. Only then it makes sense to describe the catalog structure
> in the SGML docs, I think. That's why I added some basic SGML docs for
> CREATE/DROP/ALTER STATISTICS, which I expect to be rather stable, and
> not the catalog and other low-level stuff (which is commented heavily
> in the code anyway).

Without "user-level docs" (now I understand that the term means all
SGML docs for you), it is very hard to find a visible
characteristics/behavior of the patch. CREATE/DROP/ALTER STATISTICS
just defines a user interface, and does not help how it affects to the
planning. The READMEs do not help either.

In this case reviewing your code is something like reviewing a program
which has no specification.

That's the reason why I said before below, but it was never seriously
considered.

I would likely have said this myself but didn't even get that far. 

Your contribution was useful and went further than anybody else's review, so thank you.

--
Simon Riggs                http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services

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