| From: | Andrei Lepikhov <lepihov(at)gmail(dot)com> |
|---|---|
| To: | David Rowley <dgrowleyml(at)gmail(dot)com> |
| Cc: | Ilia Evdokimov <ilya(dot)evdokimov(at)tantorlabs(dot)com>, Robert Haas <robertmhaas(at)gmail(dot)com>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Lukas Fittl <lukas(at)fittl(dot)com>, Daniel Gustafsson <daniel(at)yesql(dot)se>, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>, Nikolay Samokhvalov <samokhvalov(at)gmail(dot)com> |
| Subject: | Re: Add estimated hit ratio to Memoize in EXPLAIN to explain cost adjustment |
| Date: | 2025-07-23 07:00:44 |
| Message-ID: | CAMMNXX=AswuOW+5J3DKWPESUzLi_oor=cvG-px5Vprs88JoLDQ@mail.gmail.com |
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| Lists: | pgsql-hackers |
On 23/7/2025 02:11, David Rowley wrote:
> On Wed, 23 Jul 2025 at 02:35, Andrei Lepikhov <lepihov(at)gmail(dot)com> wrote:
>> However, at first, I'd consider how it could be added to the
>> IncrementalSort and HashJoin. The number of estimated groups/buckets may
>> also provide some insights into the planner's decision.
>
> Sounds like another patch for another thread.
Maybe, it is up to you
> Do you have an argument in mind to support adding the group?
I have not. I just thought that grouping would be helpful for an explain
parser.
--
regards, Andrei Lepikhov
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