Re: speeding up planning with partitions

From: Amit Langote <Langote_Amit_f8(at)lab(dot)ntt(dot)co(dot)jp>
To: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: David Rowley <david(dot)rowley(at)2ndquadrant(dot)com>, Imai Yoshikazu <yoshikazu_i443(at)live(dot)jp>, "jesper(dot)pedersen(at)redhat(dot)com" <jesper(dot)pedersen(at)redhat(dot)com>, "Imai, Yoshikazu" <imai(dot)yoshikazu(at)jp(dot)fujitsu(dot)com>, Amit Langote <amitlangote09(at)gmail(dot)com>, Alvaro Herrera <alvherre(at)2ndquadrant(dot)com>, Robert Haas <robertmhaas(at)gmail(dot)com>, Justin Pryzby <pryzby(at)telsasoft(dot)com>, Pg Hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: speeding up planning with partitions
Date: 2019-04-05 06:50:25
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On 2019/04/02 14:50, Amit Langote wrote:
> Attached patch is only for HEAD this time. I'll post one for PG 11 (if
> you'd like) once we reach consensus on the best thing to do here is.

While we're on the topic of the relation between constraint exclusion and
partition pruning, I'd like to (re-) propose this documentation update
patch. The partitioning chapter in ddl.sgml says update/delete of
partitioned tables uses constraint exclusion internally to emulate
partition pruning, which is no longer true as of 428b260f8.

The v2-0001 patch hasn't changed.


Attachment Content-Type Size
Update-docs-that-update-delete-no-longer-use-cons.patch text/plain 1.6 KB
v2-0001-Fix-partition-constraint-loading-in-planner.patch text/plain 9.8 KB

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