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From: Greg Sabino Mullane <[email protected]>
To: Tom Lane <[email protected]>
Cc: Ron Johnson <[email protected]>
Cc: pgsql-generallists.postgresql.org <[email protected]>
Subject: Re: Repeatable Read Isolation Level "transaction start time"
Date: Wed, 25 Sep 2024 16:22:31 -0400
Message-ID: <CAKAnmmLDpwgqu071t_Q7Fq349dYAgQim1x46U1DCAiiTcUmU2A@mail.gmail.com> (raw)
In-Reply-To: <[email protected]>
References: <[email protected]>
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On Wed, Sep 25, 2024 at 1:53 PM Tom Lane <[email protected]> wrote:

> Because we're not going to analyze the statement in the amount of depth
> needed to make that distinction before we crank up the
> transactional machinery.  If it says SELECT, it gets a snapshot.
>

Ok, thanks. So to the original poster's point, perhaps the path with the
least side effects / best Principle of Least Surprise (POLS) support is to
start the transaction, and immediately call a "SELECT 1;" or perhaps better
still, a 'SELECT timeofday();'

Cheers,
Greg

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