From: MichaelDBA@sqlexec.com <michaeldba@sqlexec.com>
To: Michael Lewis <mlewis@entrata.com>
Cc: Guillaume Cottenceau <gc@mnc.ch>
Cc: postgres performance list <pgsql-performance@postgresql.org>
Subject: Re: much slower query in production
Date: Wed, 26 Feb 2020 14:18:31 -0500
Message-ID: <69844C34-DF13-46E6-BE7C-C9DABE19D391@sqlexec.com> (raw)
In-Reply-To: <CAHOFxGp9K3LHR8ejzDvMyNNv9WmpyyA6CvctZGTeh3iJ38kcwg@mail.gmail.com>
References: <CAHOFxGp9K3LHR8ejzDvMyNNv9WmpyyA6CvctZGTeh3iJ38kcwg@mail.gmail.com>
Vacuum everything that you restored
Sent from my iPhone
> On Feb 26, 2020, at 1:19 PM, Michael Lewis <mlewis@entrata.com> wrote:
>
>
>> UPDATE multicards
>> SET defacements = COALESCE( count, 0 )
>> FROM ( SELECT multicard_uid, COUNT(*) AS count FROM tickets GROUP BY multicard_uid ) AS sub
>> WHERE uid = multicard_uid OR multicard_uid is null;
>
> I expect this should work. Not sure of performance of course.
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To: pgsql-performance@postgresql.org
Cc: michaeldba@sqlexec.com, mlewis@entrata.com, gc@mnc.ch
Subject: Re: much slower query in production
In-Reply-To: <69844C34-DF13-46E6-BE7C-C9DABE19D391@sqlexec.com>
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