From: Pavel Luzanov <p.luzanov@postgrespro.ru>
To: pgsql-docs@lists.postgresql.org
Subject: Re: Некорректное пояснение к примеру в разделе 13.2.1
Date: Wed, 27 Jun 2018 13:01:03 +0300
Message-ID: <4b95bfe2-e1e3-0716-4b10-907c3f80e549@postgrespro.ru> (raw)
In-Reply-To: <CAF+QRgkFacxcfH3evASRjRi3aXqAte4QS+G43t6DDGRdf=zFCA@mail.gmail.com>
References: <CAF+QRgkFacxcfH3evASRjRi3aXqAte4QS+G43t6DDGRdf=zFCA@mail.gmail.com>
Hello,
First of all, this english language forum.
For questions in Russian you can use
pgsql-ru-general@lists.postgresql.org list or may be postgres.ru site.
As for your question.
> /BEGIN; /
> /UPDATE website SET hits = hits + 1; /
> /DELETE FROM website WHERE hits = 10; /
> /COMMIT;/
In this example you forget a main part.
DELETE statement must be run in a second session, after UPDATE in first
session, but before COMMIT.
Look carefully in a documentation:
BEGIN;
UPDATE website SET hits = hits + 1;
-- run from another session: DELETE FROM website WHERE hits = 10;
COMMIT;
So, example is correct.
-----
Pavel Luzanov
Postgres Professional: http://www.postgrespro.com
The Russian Postgres Company
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To: pgsql-docs@postgresql.org
Cc: p.luzanov@postgrespro.ru, pgsql-docs@lists.postgresql.org
Subject: Re: Некорректное пояснение к примеру в разделе 13.2.1
In-Reply-To: <4b95bfe2-e1e3-0716-4b10-907c3f80e549@postgrespro.ru>
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