public inbox for [email protected]
help / color / mirror / Atom feedFrom: Chao Li <[email protected]>
To: Amit Langote <[email protected]>
Cc: Tom Lane <[email protected]>
Cc: Tender Wang <[email protected]>
Cc: Alexander Lakhin <[email protected]>
Cc: Tomas Vondra <[email protected]>
Cc: Robert Haas <[email protected]>
Cc: Alvaro Herrera <[email protected]>
Cc: Andres Freund <[email protected]>
Cc: Daniel Gustafsson <[email protected]>
Cc: David Rowley <[email protected]>
Cc: PostgreSQL Hackers <[email protected]>
Cc: Thom Brown <[email protected]>
Subject: Re: generic plans and "initial" pruning
Date: Mon, 24 Nov 2025 11:29:53 +0800
Message-ID: <[email protected]> (raw)
In-Reply-To: <CA+HiwqGJP91Qed0EjuB72Lv4_QAiVOMYjya7GA0aas8K6NZUZA@mail.gmail.com>
References: <CA+HiwqFpZ80UJKr4tZus4Omgg7YESzFXKSwSHRW2Ap2=XSVyUA@mail.gmail.com>
<[email protected]>
<CA+HiwqH8N-SxEB6SysEBsYNgV_KJs66k9Z2SNmqVzbBP-60yWg@mail.gmail.com>
<[email protected]>
<CA+HiwqEmG9YCQvG6uux7sO=jKFSAW6hA4Ea-ymfD+JhJAe4PWQ@mail.gmail.com>
<CA+HiwqE2FfJfH=siLiR3kJ13tmXZORAGTWsZc2r52o1_5BDv+g@mail.gmail.com>
<[email protected]>
<CA+HiwqFhkpXHAA=4NY5SqYXX08uq=nYtXcSByNZF=2MAy1UA7A@mail.gmail.com>
<CA+HiwqHCcSoYfpMjFshaU1bj6NjreiDvMSDpVSeBmqk-kbWrPw@mail.gmail.com>
<CA+HiwqHOejJk0_qMuM5g38h70hY_JvHMAKwnH3k=urfTXauPQA@mail.gmail.com>
<CA+HiwqFsGKM82oaMby3VWYXf_XFpDAMeT+6SXgj-45HpTrS1dA@mail.gmail.com>
<CA+HiwqFA5hUWYktt3VMh4zQOYMxqH-MpdX8eemfM+o-9dY-zbQ@mail.gmail.com>
<CA+HiwqEn7bbUXaXO=SmUujBjJSHfS31cwQroHRBwT0sR=66bgg@mail.gmail.com>
<CA+HiwqGGLDTd1ZTK1c0zv4La7XOVSVMqBuNtscJeh6FyUQvFvA@mail.gmail.com>
<CA+HiwqE2JFiqqrXdyJVQWY-fMGwzDkLqjXQdUKbPaCpDpxd_2g@mail.gmail.com>
<CA+HiwqFp3jZGSz==QjeuV62_62F6+V6b62=Uqvy99sW_gsgWBA@mail.gmail.com>
<CAHewXNkUz9XGG8nnoxZaw35e+5bQVVP=eeJE4cW4V2e+P9ndFw@mail.gmail.com>
<CA+HiwqFKSpfYruzcVz-5CcFxg7gMa+ycXjMa2aPz_J_P4LGXTg@mail.gmail.com>
<[email protected]>
<CA+HiwqEQ1oME-hcDXwC9rGQb=u7MdUFG3Sc=Qg27uH480v10FA@mail.gmail.com>
<[email protected]>
<CA+HiwqGXMLSQyJvynWF40yNwBAx-pXtxemReP8L+C+kaUa5v5A@mail.gmail.com>
<CA+HiwqGBfMgcxokEH_mg6s=ttLFm54dj4hT6yXydU2t0g6oQ3g@mail.gmail.com>
<CA+HiwqEEkGfMc_LSJhfz96o-czVS4B59Vhw6i1_t58ZGqhP8VA@mail.gmail.com>
<CA+HiwqHAd+9nptjxP6=KrcKA1BMsS6pbB3B2oaojwdyH_wBWCA@mail.gmail.com>
<CA+HiwqE7_YpU--EsrhvNqcZ+10+92EGFaX5609AUJb9ENLntnQ@mail.gmail.com>
<CA+HiwqEF9SgKyQ1HrYOURpv8DGRGHDNwBT9Y6yEBVCW+=kh_=w@mail.gmail.com>
<CA+HiwqFpEHBjosRackQhm6yKKnHgqm8Ewkn=qsctT1N0PqVSrg@mail.gmail.com>
<CA+HiwqGJP91Qed0EjuB72Lv4_QAiVOMYjya7GA0aas8K6NZUZA@mail.gmail.com>
Hi, Amit,
Locking only surviving partitions sounds a good optimization. I started to review this patch, but I cannot finish reviewing in one day. I will post my comments as long as I finished some commits.
> On Nov 20, 2025, at 15:30, Amit Langote <[email protected]> wrote:
>
> <v3-0004-Use-pruning-aware-locking-in-cached-plans.patch><v3-0005-Add-test-exercising-prep-cleanup-on-cached-plan-i.patch><v3-0002-Introduce-ExecutorPrep-and-refactor-executor-star.patch><v3-0006-Make-SQL-function-executor-track-ExecutorPrep-sta.patch><v3-0003-Reuse-partition-pruning-results-in-parallel-worke.patch><v3-0001-Refactor-partition-pruning-initialization-for-cla.patch>
0001 splits creations of es_part_prune_states into a new function ExecCreatePartitionPruneStates(). With that, you are trying to make the code clearer as you stated in the commit comment. However, the new function is not called, meaning 0001 is not self-contained, feels unusual to me according to the patches I have reviewed so far. I would suggest have ExecDoInitialPruning() call ExecCreatePartitionPruneStates() when es_part_prune_states is still NIL., so that current logic is unchanged, and 0001 can be pushed independently.
0002 moves check permission etc logic from InitPlan() to the new function ExecutorPrep(). The commit message says “executor setup logic unchanged”. Because in old code, before permission check, there was no PushActiveSnapshot(), but in the patch, before check permission, PushActiveSnapshot() is done, which may introduce different behavior, I just wonder why PushActiveSnapshot() is added?
Actually, I am still trying to understand 0002-0004, it would take me some time to fully understand the patch. I’d raise the above comments first. I will continue reviewing this patch tomorrow.
Best regards,
--
Chao Li (Evan)
HighGo Software Co., Ltd.
https://www.highgo.com/
view thread (114+ messages) latest in thread
reply
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Reply to all the recipients using the --to and --cc options:
reply via email
To: [email protected]
Cc: [email protected], [email protected], [email protected], [email protected], [email protected], [email protected], [email protected], [email protected], [email protected], [email protected], [email protected], [email protected]
Subject: Re: generic plans and "initial" pruning
In-Reply-To: <[email protected]>
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
This inbox is served by agora; see mirroring instructions
for how to clone and mirror all data and code used for this inbox