Re: Select for update

From: "David G(dot) Johnston" <david(dot)g(dot)johnston(at)gmail(dot)com>
To: Yambu <hyambu(at)gmail(dot)com>
Cc: pgsql-sql <pgsql-sql(at)lists(dot)postgresql(dot)org>
Subject: Re: Select for update
Date: 2021-05-26 12:27:24
Message-ID: CAKFQuwYiJyPu2vezTJHzDNqM0+Er-NMf_doDjhiZmWToVhJttQ@mail.gmail.com
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On Wednesday, May 26, 2021, Yambu <hyambu(at)gmail(dot)com> wrote:

> Hello
>
> May i know if i run the update below if the row select in SELECT FOR
> UPDATE will not be available for selection during update?
>
> UPDATE table1 set status_id=13 WHERE id= ( SELECT id FROM table2 where
> status_id=1 LIMIT 1) RETURNING id into v_id;
>

Which update? The way it works is by locking - Ihe row is available but
locked and may require waiting.

David J.

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