Re: In-placre persistance change of a relation

On Mon, 4 Sept 2023 at 16:59, Kyotaro Horiguchi <horikyota(dot)ntt(at)gmail(dot)com> wrote:
>
> At Thu, 24 Aug 2023 11:22:32 +0900 (JST), Kyotaro Horiguchi <horikyota(dot)ntt(at)gmail(dot)com> wrote in
> > I could turn this into something like undo longs in a simple form, but
> > I'd rather not craft a general-purpose undo log system for this unelss
> > it's absolutely necessary.
>
> This is a patch for a basic undo log implementation. It looks like it
> works well for some orphan-files-after-a-crash and data-loss-on-reinit
> cases. However, it is far from complete and likely has issues with
> crash-safety and the durability of undo log files (and memory leaks
> and performance and..).
>
> I'm posting this to move the discussion forward.
>
> (This doesn't contain the third file "ALTER TABLE ..ALL IN TABLESPACE" part.)

CFBot shows compilation issues at [1] with:
09:34:44.987] /usr/bin/ld:
src/backend/postgres_lib.a.p/access_transam_twophase.c.o: in function
`FinishPreparedTransaction':
[09:34:44.987] /tmp/cirrus-ci-build/build/../src/backend/access/transam/twophase.c:1569:
undefined reference to `AtEOXact_SimpleUndoLog'
[09:34:44.987] /usr/bin/ld:
src/backend/postgres_lib.a.p/access_transam_xact.c.o: in function
`CommitTransaction':
[09:34:44.987] /tmp/cirrus-ci-build/build/../src/backend/access/transam/xact.c:2372:
undefined reference to `AtEOXact_SimpleUndoLog'
[09:34:44.987] /usr/bin/ld:
src/backend/postgres_lib.a.p/access_transam_xact.c.o: in function
`AbortTransaction':
[09:34:44.987] /tmp/cirrus-ci-build/build/../src/backend/access/transam/xact.c:2878:
undefined reference to `AtEOXact_SimpleUndoLog'
[09:34:44.987] /usr/bin/ld:
src/backend/postgres_lib.a.p/access_transam_xact.c.o: in function
`CommitSubTransaction':
[09:34:44.987] /tmp/cirrus-ci-build/build/../src/backend/access/transam/xact.c:5016:
undefined reference to `AtEOXact_SimpleUndoLog'
[09:34:44.987] /usr/bin/ld:
src/backend/postgres_lib.a.p/access_transam_xact.c.o: in function
`AbortSubTransaction':
[09:34:44.987] /tmp/cirrus-ci-build/build/../src/backend/access/transam/xact.c:5197:
undefined reference to `AtEOXact_SimpleUndoLog'
[09:34:44.987] /usr/bin/ld:
src/backend/postgres_lib.a.p/access_transam_xact.c.o:/tmp/cirrus-ci-build/build/../src/backend/access/transam/xact.c:6080:
more undefined references to `AtEOXact_SimpleUndoLog' follow

[1] - https://cirrus-ci.com/task/5916232528953344

Regards,
Vignesh