On 2021-01-11 09:09, Michael Paquier wrote:
> On Sat, Jan 09, 2021 at 01:41:39PM +0100, Peter Eisentraut wrote:
>> If we had a way to do such testing then we wouldn't need these markers. But
>> AFAICT, we don't.
>
> Not sure I am following your point here. Taking your patch, it is
> possible to trigger the version of get_raw_page() <= 1.8 just with
> something like the following:
> create extension pageinspect version "1.8";
> select get_raw_page('pg_class', 0);
>
> There are no in-core regression tests that check the compatibility of
> extensions with older versions, but it is technically possible to do
> so.
Interesting idea. Here is a patch that incorporates that.