Re: multivariate statistics (v19)

On 08/05/2016 06:24 AM, Michael Paquier wrote:
> On Wed, Aug 3, 2016 at 10:58 AM, Tomas Vondra
> <tomas(dot)vondra(at)2ndquadrant(dot)com> wrote:
>> Attached is v19 of the "multivariate stats" patch series - essentially v18
>> rebased on top of current master. Aside from a few bug fixes, the main
>> improvement is addition of SGML docs demonstrating the statistics in a way
>> similar to the current "Row Estimation Examples" (and the docs are actually
>> in the same section). I've tried to keep the right amount of technical
>> detail (and pointing to the right README for additional details), but this
>> may need improvements. I have not written docs explaining how statistics may
>> be combined yet (more about this later).
>
> What we have here is quite something:
> $ git diff master --stat | tail -n1
> 77 files changed, 12809 insertions(+), 65 deletions(-)
> I will try to get familiar on the topic and added myself as a reviewer
> of this patch. Hopefully I'll get feedback soon.

Yes, it's a large patch. Although 25% of the insertions are SGML docs,
regression tests and READMEs, and large part of the remaining ~9k
insertions are comments. But it may still be overwhelming, no doubt
about that.

FWIW, if someone is interested in the patch but is unsure where to
start, I'm ready to help with that as much as possible. For example if
you happen to go to PostgresOpen, feel free to drag me to a corner and
ask me as many questions as you want ...

regards

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