Re: Add LSN along with offset to error messages reported for WAL file read/write/validate header failures

Bharath Rupireddy <bharath.rupireddyforpostgres@gmail.com>

From: Bharath Rupireddy <bharath.rupireddyforpostgres@gmail.com>
To: Michael Paquier <michael@paquier.xyz>
Cc: Magnus Hagander <magnus@hagander.net>, Kyotaro Horiguchi <horikyota.ntt@gmail.com>, orlovmg@gmail.com, alvherre@alvh.no-ip.org, nathandbossart@gmail.com, pgsql-hackers@lists.postgresql.org
Date: 2022-12-21T05:39:01Z
Lists: pgsql-hackers
On Wed, Dec 21, 2022 at 5:39 AM Michael Paquier <michael@paquier.xyz> wrote:
>
> On Tue, Dec 20, 2022 at 06:04:40PM +0530, Bharath Rupireddy wrote:
> > On Tue, Dec 20, 2022 at 1:27 PM Magnus Hagander <magnus@hagander.net> wrote:
> >> Caught this thread late. To me, pg_dissect_walfile_name() is a
> >> really strange name for a function. Grepping our I code I see the
> >> term dissect s used somewhere inside the regex code and exactly
> >> zero instances elsewhere. Which is why I definitely didn't
> >> recognize the term...
> >>
> >> Wouldn't something like pg_split_walfile_name() be a lot more
> >> consistent with the rest of our names?
>
> Fine by me to change that if there is little support for the current
> naming, though the current one does not sound that bad to me either.
>
> > Hm. FWIW, here's the patch.
>
> "split" is used a lot for the picksplit functions, but not in any of
> the existing functions as a name.  Some extra options: parse, read,
> extract, calculate, deduce, get.  "parse" would be something I would
> be OK with.

"dissect", "split" and "parse" -  I'm okay with either of these.

Read somewhere - a saying that goes this way "the hardest part of
coding is to name variables and functions" :).

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



Commits

  1. Rename pg_dissect_walfile_name() to pg_split_walfile_name()

  2. Add pg_dissect_walfile_name()

  3. Add LSN location in some error messages related to WAL pages