Re: Multi-column distinctness.
| От | Simon Riggs |
|---|---|
| Тема | Re: Multi-column distinctness. |
| Дата | |
| Msg-id | CANP8+j+F+DzrzCW1cjK1Up009TAytYN=P_DNsJ4OZEUJEXywjA@mail.gmail.com обсуждение исходный текст |
| Ответ на | Multi-column distinctness. (Kyotaro HORIGUCHI <horiguchi.kyotaro@lab.ntt.co.jp>) |
| Ответы |
Re: Multi-column distinctness.
Re: Multi-column distinctness. |
| Список | pgsql-hackers |
On 28 August 2015 at 09:33, Kyotaro HORIGUCHI <horiguchi.kyotaro@lab.ntt.co.jp> wrote:
--
Tomas Vondra is now working on heavily-equipped multivariate
statistics for OLAP usage. In contrast, this is a lightly
implemented solution which calculates only the ratio between a
rows estimated by current method and a actual row number. I think
this doesn't conflict with his work except the grammar part.
I think it very obviously does conflict, so I don't see this patch as appropriate.
If you think a cut version of Tomas' patch is appropriate, then the usual response is to give a review that says "Tomas, I think a cut down version is appropriate here, can we reduce the scope of this patch for now?". If you have done that and he refuses to listen, then a separate patch version is appropriate. Otherwise we should just reject this second patchset to avoid confusion and to avoid encouraging people to take this approach.
Simon Riggs http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services
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