Re: When extended query protocol ends?

From: Dave Cramer <davecramer(at)postgres(dot)rocks>
To: Tatsuo Ishii <ishii(at)sraoss(dot)co(dot)jp>
Cc: tgl(at)sss(dot)pgh(dot)pa(dot)us, pgsql-hackers(at)postgresql(dot)org
Subject: Re: When extended query protocol ends?
Date: 2024-02-15 13:34:12
Message-ID: CADK3HHKQXWWP6mwErUN_3ROMDs1enmdct+KnoejO-gK7QWnCfA@mail.gmail.com
Views: Raw Message | Whole Thread | Download mbox | Resend email
Thread:
Lists: pgsql-hackers

On Wed, 14 Feb 2024 at 17:55, Tatsuo Ishii <ishii(at)sraoss(dot)co(dot)jp> wrote:

> >>> From [1] I think the JDBC driver sends something like below if
> >>> autosave=always option is specified.
> >>>
> >>> "BEGIN READ ONLY" Parse/Bind/Eexecute (in the extended query protocol)
> >>> "SAVEPOINT PGJDBC_AUTOSAVE" (in the simple query protocol)
> >>>
> >>> It seems the SAVEPOINT is sent without finishing the extended query
> >>> protocol (i.e. without Sync message). Is it possible for the JDBC
> >>> driver to issue a Sync message before sending SAVEPOINT in simple
> >>> query protocol? Or you can send SAVEPOINT using the extended query
> >>> protocol.
> >>>
> >>> [1]
> >>>
> https://www.pgpool.net/pipermail/pgpool-general/2023-December/009051.html
> >>
> >>
> >> Can you ask the OP what version of the driver they are using. From what
> I
> >> can tell we send BEGIN using SimpleQuery.
> >
> > Sure. I will get back once I get the JDBC version.
>
> Here it is:
> > JDBC driver version used:42.5.1 Regards, Karel.
>

Can you ask the OP what they are doing in the startup. I'm trying to
replicate their situation.
Looks like possibly 'setReadOnly' and 'select version()'

Thanks,
Dave

>
>

In response to

Responses

Browse pgsql-hackers by date

  From Date Subject
Next Message Tomas Vondra 2024-02-15 14:36:19 Re: index prefetching
Previous Message Peter Eisentraut 2024-02-15 12:59:04 Re: Reducing output size of nodeToString