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From: Andrei Lepikhov <a.lepikhov@postgrespro.ru>
To: Richard Guo <guofenglinux@gmail.com>
Cc: Alexander Korotkov <aekorotkov@gmail.com>
Cc: Alexander Lakhin <exclusion@gmail.com>
Cc: Gregory Stark (as CFM) <stark.cfm@gmail.com>
Cc: Michał Kłeczek <michal@kleczek.org>
Cc: PostgreSQL Hackers <pgsql-hackers@lists.postgresql.org>
Cc: Tom Lane <tgl@sss.pgh.pa.us>
Subject: Re: Removing unneeded self joins
Date: Wed, 21 Feb 2024 14:59:45 +0700
Message-ID: <dc465c1a-c9dc-4f57-af73-9c5f1cd0854a@postgrespro.ru> (raw)
In-Reply-To: <CAMbWs4-=PO6Mm9gNnySbx0VHyXjgnnYYwbN9dth=TLQweZ-M+g@mail.gmail.com>
References: <64486b0b-0404-e39e-322d-0801154901f3@postgrespro.ru>
	<922623af-872e-4cdc-9238-129b18bee42d@postgrespro.ru>
	<CAPpHfduoAHTp6O7Q8PDe_w=30v0n_06pGe5M65iR4DYcfaYnRw@mail.gmail.com>
	<107682e0-137a-d0fb-2733-7fc6e9562690@gmail.com>
	<CAPpHfduLxYm4biJrTbjBxTAW6vkxBswuQ2B=gXU+c37QJd6+Ow@mail.gmail.com>
	<a89f480f-8143-0965-f22d-0a892777f501@gmail.com>
	<0c5f461f-e26f-4fd9-9700-91b0e9c38fd6@postgrespro.ru>
	<336c748b-4ffe-5915-3d3c-ece6d19e021c@gmail.com>
	<4788f781-31bd-9796-d7d6-588a751c8787@gmail.com>
	<CAPpHfduYKqbWWT=YuBJyoExrwsJSgjUuJN1Gsr2YZMG=nh_ctQ@mail.gmail.com>
	<CAPpHfdvu+wyazT+ujJbJ5rKZrHQoG+FCVeWENA4pyf_A1W1WAA@mail.gmail.com>
	<56ee4520-e9d1-d519-54fe-c8bff880ce9b@gmail.com>
	<CAPpHfdsJ=MZNFw0L2T_k-shOk+4dPNx9j5RZzicy3NW+yiiQVg@mail.gmail.com>
	<CAPpHfdtB0A1Rz8k5yPMCM6ngLt2JM4NSaG8rF0=wT-txdcEf3g@mail.gmail.com>
	<5063f378-ca3c-405e-b1e8-1927ea9052e8@postgrespro.ru>
	<CAMbWs4-=PO6Mm9gNnySbx0VHyXjgnnYYwbN9dth=TLQweZ-M+g@mail.gmail.com>

On 21/2/2024 14:26, Richard Guo wrote:
> This patch also includes some cosmetic tweaks for SJE test cases.  It
> does not change the test cases using catalog tables though.  I think
> that should be a seperate patch.
Thanks for this catch, it is really messy thing, keeping aside the 
question why we need two different subtrees for the same query.
I will look into your fix.

-- 
regards,
Andrei Lepikhov
Postgres Professional






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