Re: [HACKERS] Partition-wise aggregation/grouping
| От | Jeevan Chalke |
|---|---|
| Тема | Re: [HACKERS] Partition-wise aggregation/grouping |
| Дата | |
| Msg-id | CAM2+6=UB5i5wtW-gFvLbJ1P7YUMO7NZdXUTK89EFaUH3sSqu-g@mail.gmail.com обсуждение исходный текст |
| Ответ на | Re: [HACKERS] Partition-wise aggregation/grouping (Dilip Kumar <dilipbalaut@gmail.com>) |
| Ответы |
Re: [HACKERS] Partition-wise aggregation/grouping
|
| Список | pgsql-hackers |
On Tue, Oct 17, 2017 at 7:13 PM, Dilip Kumar <dilipbalaut@gmail.com> wrote:
On Fri, Oct 13, 2017 at 12:06 PM, Jeevan Chalke
<jeevan.chalke@enterprisedb.com> wrote:
>
While playing around with the patch I have noticed one regression with
the partial partition-wise aggregate.
I am consistently able to reproduce this on my local machine.
Scenario: Group by on non-key column and only one tuple per group.
I didn't get what you mean by regression here. Can you please explain?
I see that PWA plan is selected over regular plan when enabled on the basis of costing.
Regular planning need a Result node due to which costing increases where as PWA don't need that and thus wins.
--
Jeevan Chalke
Technical Architect, Product Development
EnterpriseDB Corporation
The Enterprise PostgreSQL Company
Technical Architect, Product Development
EnterpriseDB Corporation
The Enterprise PostgreSQL Company
В списке pgsql-hackers по дате отправления: