Alexander Korotkov <aekorotkov(at)gmail(dot)com> writes:
> Given this, should we try to do better with binary compatibility
> checks using ControlFileData? AFAICS they are supposed to check if
> the database cluster is binary compatible with the running
> architecture. But it obviously allows incompatibilities.
Perhaps. pg_control already covers endianness, which I think
is the root of the hashing differences I showed. Adding a field
for char signedness feels a little weird, since it's not directly
a property of the bits-on-disk, but maybe we should.
regards, tom lane