Re: Key management with tests

Thank you for your reply，

On Wed, Jan 13, 2021 at 12:08 AM Stephen Frost <sfrost(at)snowman(dot)net> wrote:

>
> No, we can't 'modify the page format as we wish'- if we change away from
> using a C structure then we're going to be modifying quite a bit of
> code which otherwise doesn't need to be changed. The proposed flag
> doesn't actually make a different page format work, the only thing it
> would do would be to allow some parts of the cluster to be encrypted and
> other parts not be, but I don't know that that's actually a useful
> capability or a good reason to use one of those bits. Having it handled
> on a cluster level, at initdb time through pg_control, seems like it'd
> work just fine.
>
>
Yes, I realized that for cluster-level encryption, it would be unwise to
flag a single page(Unless we want to do it at relation-level). Forgive me
for not describing clearly, the 'modify the page' I said means the method
you mentioned, not modifying the C structure. My original motivation is to
avoid storing in an unconventional format without a description of the C
structure. However, as I just said, it seems that we should not set
the flag for a single page. Maybe it's enough to just add a comment
description?