Tomas Vondra <tomas@vondra.me> writes:
> For a moment I was worried about breaking ABI when fixing this in the
> backbranches, but I guess that's not an issue for tools like pg_dump.
Yeah, I think it'd be okay to change compress_io.h APIs in the back
branches; it's hard to see how anything outside pg_dump+pg_restore
would be depending on that.
regards, tom lane