On Wed, 4 Mar 2026 at 06:05, Tom Lane <[email protected]> wrote: > > Michael Paquier <[email protected]> writes: > > Now, let's see how much this abreaks the buildfarm.. Because things > > will break. I'll send a poke to the buildfarm mailing list. > > I don't think this idea is really fully baked yet. What happens > if I build with liblz4, and run for a while with that so that > there are lz4-compressed TOAST values, and then try to update > to a build without LZ4?
That doesn't seem like a new problem to me. That's already possible since PG14. To me it actually seems more likely to happen, because we default to allowing builds without lz4 (which we stopped doing on master). The fact that we haven't had (many) people complain indicates to me that it isn't a big problem in practice.
