Re: Add a perl function in Cluster.pm to generate WAL

On Wed, Aug 24, 2022 at 6:42 AM Kyotaro Horiguchi
<horikyota.ntt@gmail.com> wrote:
>
> At Tue, 16 Aug 2022 18:40:49 +0200, Alvaro Herrera <alvherre@alvh.no-ip.org> wrote in
> > On 2022-Aug-16, Andrew Dunstan wrote:
> >
> > > I don't think there's a hard and fast rule about it. Certainly the case
> > > would be more compelling if the functions were used across different TAP
> > > suites. The SSL suite has suite-specific modules. That's a pattern also
> > > worth considering. e.g something like.
> > >
> > >     use FindBin qw($Bin);
> > >     use lib $Bin;
> > >     use MySuite;
> > >
> > > and then you put your common routines in MySuite.pm in the same
> > > directory as the TAP test files.
> >
> > Yeah, I agree with that for advance_wal.  Regarding find_in_log, that
> > one seems general enough to warrant being in Cluster.pm -- consider
> > issues_sql_like, which also slurps_file($log).  That could be unified a
> > little bit, I think.
>
> +1

With the generalized function for find_in_log() has been added as part
of https://git.postgresql.org/gitweb/?p=postgresql.git;a=commitdiff;h=e25e5f7fc6b74c9d4ce82627e9145ef5537412e2,
I'm proposing a generalized function for advance_wal(). Please find
the attached patch.

I tried to replace the existing tests with the new cluster function
advance_wal(). Please let me know if I'm missing any other tests.
Also, this new function can be used by an in-progress feature -
https://commitfest.postgresql.org/43/3663/.

Thoughts?

FWIW, it's discussed here -
https://www.postgresql.org/message-id/ZIKVd%2Ba43UfsIWJE%40paquier.xyz.

--
Bharath Rupireddy
PostgreSQL Contributors Team
RDS Open Source Databases
Amazon Web Services: https://aws.amazon.com