Re: Planning incompatibilities for Postgres 10.0

Bruce Momjian wrote:

> OK, I have added a section to the TODO list for this:
> 
>     Desired changes that would prevent upgrades with pg_upgrade
>     
>         32-bit page checksums 
> 
> Are there any others?

I would have each data segment be self-identifying, i.e. have a magic
number at the beginning of the file and the relation OID, some fork
identification and the segment number somewhere -- probably the special
space of the first page.

-- 
Álvaro Herrera                http://www.2ndQuadrant.com/
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