Re: using custom scan nodes to prototype parallel sequential scan
| От | David Rowley |
|---|---|
| Тема | Re: using custom scan nodes to prototype parallel sequential scan |
| Дата | |
| Msg-id | CAApHDvrydD0Wp89Y_TF4mx0+pWSdzomat3wWTpE-i_oEZEPyaA@mail.gmail.com обсуждение исходный текст |
| Ответ на | Re: using custom scan nodes to prototype parallel sequential scan (Simon Riggs <simon@2ndQuadrant.com>) |
| Ответы |
Re: using custom scan nodes to prototype parallel
sequential scan
Re: using custom scan nodes to prototype parallel sequential scan Re: using custom scan nodes to prototype parallel sequential scan |
| Список | pgsql-hackers |
On Tue, Nov 11, 2014 at 9:29 PM, Simon Riggs <simon@2ndquadrant.com> wrote:
This plan type is widely used in reporting queries, so will hit the
mainline of BI applications and many Mat View creations.
This will allow SELECT count(*) FROM foo to go faster also.
We'd also need to add some infrastructure to merge aggregate states together for this to work properly. This means that could also work for avg() and stddev etc. For max() and min() the merge functions would likely just be the same as the transition functions.
Regards
David Rowley
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