Horton

Re: Libpq support to connect to standby server as priority

Greg Nancarrow <gregn4422@gmail.com>

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From: Greg Nancarrow <gregn4422@gmail.com>
To: Tom Lane <tgl@sss.pgh.pa.us>
Cc: Alvaro Herrera <alvherre@alvh.no-ip.org>, Anastasia Lubennikova <a.lubennikova@postgrespro.ru>, Peter Smith <smithpb2250@gmail.com>, "Smith, Peter" <peters@fast.au.fujitsu.com>, David Steele <david@pgmasters.net>, "Tsunakawa, Takayuki" <tsunakawa.takay@fujitsu.com>, Haribabu Kommi <kommi.haribabu@gmail.com>, Robert Haas <robertmhaas@gmail.com>, Laurenz Albe <laurenz.albe@cybertec.at>, Dave Cramer <pg@fastcrypt.com>, Jing Wang <jingwangian@gmail.com>, PostgreSQL-development <pgsql-hackers@postgresql.org>, Elvis Pranskevichus <elprans@gmail.com>
Date: 2020-12-01T08:09:10Z
Lists: pgsql-hackers

Attachments

On Thu, Nov 26, 2020 at 11:07 AM Greg Nancarrow <gregn4422@gmail.com> wrote:
>
> On Thu, Nov 26, 2020 at 3:43 AM Tom Lane <tgl@sss.pgh.pa.us> wrote:
> >
> > Thanks for looking!  Pushed.
> >
> > At this point the cfbot is going to start complaining that the last-posted
> > patch in this thread no longer applies.  Unless you have a new patch set
> > nearly ready to post, I think we should close the CF entry as RWF, and
> > then you can open a new one when you're ready.
> >
>
> Actually, the cfbot shouldn't be complaining, as my last-posted patch
> still seems to apply cleanly on the latest code (with your pushed
> patch), and all tests pass.
> Hopefully it's OK to let it roll over to the next CF with the WOA status.
> I am actively working on processing the feedback and updating the
> patch, and hope to post an update next week sometime.
>

Posting an updated set of patches.

Regards,
Greg Nancarrow
Fujitsu Australia

Commits

  1. Make test_target_session_attrs more robust against connection failure.

  2. Extend the abilities of libpq's target_session_attrs parameter.

  3. Mark default_transaction_read_only as GUC_REPORT.

  4. Introduce a new GUC_REPORT setting "in_hot_standby".

  5. Avoid spamming the client with multiple ParameterStatus messages.

  6. Avoid harmless Valgrind no-buffer-pin errors.

  7. Restructure libpq code to remove some duplicity

  8. libpq: Add target_session_attrs parameter.