Re: ModifyTable overheads in generic plans

From: Amit Langote <amitlangote09(at)gmail(dot)com>
To: Heikki Linnakangas <hlinnaka(at)iki(dot)fi>
Cc: Robert Haas <robertmhaas(at)gmail(dot)com>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>, David Rowley <dgrowleyml(at)gmail(dot)com>, "Tsunakawa, Takayuki" <tsunakawa(dot)takay(at)jp(dot)fujitsu(dot)com>
Subject: Re: ModifyTable overheads in generic plans
Date: 2020-12-07 06:53:37
Message-ID: CA+HiwqGgP0OLhHkZcNN9GJjNqkY3P66776XzG_fLzKFNfYeg-g@mail.gmail.com
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On Thu, Nov 12, 2020 at 5:04 PM Amit Langote <amitlangote09(at)gmail(dot)com> wrote:
> Attached new 0002 which does these adjustments. I went with
> ri_RootTargetDesc to go along with ri_RelationDesc.
>
> Also, I have updated the original 0002 (now 0003) to make
> GetChildToRootMap() use ri_RootTargetDesc instead of
> ModifyTableState.rootResultRelInfo.ri_RelationDesc, so that even
> AfterTriggerSaveEvent() can now use that function. This allows us to
> avoid having to initialize ri_ChildToRootMap anywhere but inside
> GetChildRootMap(), with that long comment defending doing so. :-)

These needed to be rebased due to recent copy.c upheavals. Attached.

--
Amit Langote
EDB: http://www.enterprisedb.com

Attachment Content-Type Size
v11-0001-Set-ForeignScanState.resultRelInfo-lazily.patch application/octet-stream 4.1 KB
v11-0002-Rethink-ResultRelInfo.ri_PartitionRoot.patch application/octet-stream 26.7 KB
v11-0003-Initialize-result-relation-information-lazily.patch application/octet-stream 52.2 KB

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