| From: | Andy Fan <zhihuifan1213(at)163(dot)com> |
|---|---|
| To: | Richard Guo <guofenglinux(at)gmail(dot)com> |
| Cc: | PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>, pgsql-hackers(at)lists(dot)postgresql(dot)org |
| Subject: | Re: Eager aggregation, take 3 |
| Date: | 2024-03-04 11:45:43 |
| Message-ID: | 87il22cj51.fsf@163.com |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-hackers |
Richard Guo <guofenglinux(at)gmail(dot)com> writes:
> Hi All,
>
> Eager aggregation is a query optimization technique that partially
> pushes a group-by past a join, and finalizes it once all the relations
> are joined. Eager aggregation reduces the number of input rows to the
> join and thus may result in a better overall plan. This technique is
> thoroughly described in the 'Eager Aggregation and Lazy Aggregation'
> paper [1].
This is a really helpful and not easy task, even I am not sure when I
can spend time to study this, I want to say "Thanks for working on
this!" first and hope we can really progress on this topic. Good luck!
--
Best Regards
Andy Fan
| From | Date | Subject | |
|---|---|---|---|
| Next Message | Ranier Vilela | 2024-03-04 11:47:11 | Re: Tidy fill hstv array (src/backend/access/heap/pruneheap.c) |
| Previous Message | Andy Fan | 2024-03-04 11:37:54 | Re: a wrong index choose when statistics is out of date |