Re: Did we really want to force an initdb in beta2?

Tom Lane wrote:
> Dave Page <dpage(at)pgadmin(dot)org> writes:
> > On Fri, Jun 4, 2010 at 2:49 PM, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
> >> Right, because the catalog contents didn't change. Seems to me you'd
> >> better teach the installers to look at PG_CONTROL_VERSION too.
>
> > Hmm, is there anything else that might need to be checked?
>
> Offhand I can think of three internal version-like numbers:
>
> CATALOG_VERSION_NO --- bump if initial system catalog contents would be
> inconsistent with backend code
>
> PG_CONTROL_VERSION --- bump when contents of pg_control change
>
> XLOG_PAGE_MAGIC --- bump on incompatible change in WAL contents

pg_upgrade never views these in their raw format so does not need to
check them. (It does look at pg_controldata text output.)

--
Bruce Momjian <bruce(at)momjian(dot)us> http://momjian.us
EnterpriseDB http://enterprisedb.com

+ None of us is going to be here forever. +