Re: pg_walfile_name_offset can return inconsistent values

On Mon, Nov 13, 2023 at 09:49:53AM -0800, Andres Freund wrote:
> Hi,
> 
> On 2023-11-13 12:14:57 -0500, Bruce Momjian wrote:
> > +SELECT *
> > +FROM (values ('0/16ffffff'), ('0/17000000'), ('0/17000001')) as t(lsn),
> > +     LATERAL pg_walfile_name_offset(lsn::pg_lsn),
> > +     LATERAL pg_walfile_name(lsn::pg_lsn);
> > +    lsn     |        file_name         | file_offset |     pg_walfile_name      
> > +------------+--------------------------+-------------+--------------------------
> > + 0/16ffffff | 000000010000000000000016 |    16777215 | 000000010000000000000016
> > + 0/17000000 | 000000010000000000000017 |           0 | 000000010000000000000017
> > + 0/17000001 | 000000010000000000000017 |           1 | 000000010000000000000017
> > +(3 rows)
> 
> These would break when testing with a different segment size. Today that's not
> the case...

Okay, test removed in the updated patch.

-- 
  Bruce Momjian  <bruce@momjian.us>        https://momjian.us
  EDB                                      https://enterprisedb.com

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