Re: cutting down the TODO list thread

Hi,

On 2020-10-27 15:24:35 -0400, John Naylor wrote:
> As I mentioned in [1], I've volunteered to clear out the TODO list of items
> that appear to be too difficult, controversial, or otherwise not worth
> doing to warrant being listed there. I'll be working a few sections at a
> time, and every so often I'll have a list of proposed items for removal. If
> I don't hear objections, I'll remove the items after a few days while going
> through the next set.
>
> Where there's an email thread, I've skimmed a few messages to get a sense
> of the community's thoughts on it. Where easily determined, I've taken age
> into account, insofar as something from 2017 is going to get much more
> benefit of doubt than something from 2008. I've added after each item a
> phrase that sums up the reason I believe it doesn't belong anymore.
> Feedback welcome, of course, although I suspect there won't be much.
>

> - Prevent query cancel packets from being replayed by an attacker,
> especially when using SSL
> Old and difficult

FWIW, I don't think we should remove this. Our current solution has some
serious issues that we should address at some point.

> - Allow WAL replay of CREATE TABLESPACE to work when the directory
> structure on the recovery computer is different from the original
> Thread quote: "part of the difficult, perhaps-not-worth doing impossible
> problems"

I think we ought to do something here. Mostly because the current
situation makes it impossible to test many things on a single
system. And we have a partial solution with the tablespace mapping
files.

Greetings,

Andres Freund