Mark Dilger <mark(dot)dilger(at)enterprisedb(dot)com> writes:
> I don't think we support using a .so that is mismatched against the
> version of the extension that is installed.
You are entirely mistaken. That's not only "supported", it's *required*.
Consider binary upgrades, where the SQL objects are transferred as-is
but the receiving installation may have a different (hopefully newer)
version of the .so. That .so has to cope with the older SQL object
definitions; it doesn't get to assume that the upgrade script has been
run yet.
regards, tom lane