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help / color / mirror / Atom feedFrom: David Rowley <[email protected]>
To: Renan Alves Fonseca <[email protected]>
Cc: Evgeny Morozov <[email protected]>
Cc: pgsql-general <[email protected]>
Subject: Re: Querying one partition in a function takes locks on all partitions
Date: Mon, 31 Mar 2025 16:10:21 +1300
Message-ID: <CAApHDvp3EDrVhGjmb21bceJ5-Y7iXKOn2UGG3-ngp_9ob_mpLw@mail.gmail.com> (raw)
In-Reply-To: <CAN_p2QghEHKeyTvb6Gc8F3y6wNm+dJXaCdrAnrV7TEq15Oh-pg@mail.gmail.com>
References: <01020195b987abd3-a008b77d-8c63-4931-80a4-be36a351c8b2-000000@eu-west-1.amazonses.com>
<CAN_p2Qi_zie4aZqMcYuT-Y5CxyvUJ+nBAomQNJSPbBjrCPEXJw@mail.gmail.com>
<01020195dd9e8337-c912f36d-54ef-4d3c-a00d-5e697b308d33-000000@eu-west-1.amazonses.com>
<CAN_p2QghEHKeyTvb6Gc8F3y6wNm+dJXaCdrAnrV7TEq15Oh-pg@mail.gmail.com>
On Sat, 29 Mar 2025 at 10:30, Renan Alves Fonseca
<[email protected]> wrote:
> Currently, in the SQL function path the plan is always generic. The
> planner ignores the function arguments. The plan_cache_mode setting
> has no effect in this path.
>
> I agree that the docs should be more explicit about this. There is a
> high penalty for using generic plans in complex functions.
If you have any suggestions about where you think those should be
added or wording for that, please feel free to suggest.
For the part that's specific to partitioning, I've suggested some
additional wording in the relevant spot in [1].
David
[1] https://postgr.es/m/CAApHDvogvzANoTOCyXUWgEuPFx1nT6S63aAN0bDRSJ=TaGBWew@mail.gmail.com
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Subject: Re: Querying one partition in a function takes locks on all partitions
In-Reply-To: <CAApHDvp3EDrVhGjmb21bceJ5-Y7iXKOn2UGG3-ngp_9ob_mpLw@mail.gmail.com>
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