> I think you should just tighten up the sanity checking in the existing
> function _hash_ovflblkno_to_bitno rather than duplicating the code. I
> don't think it's called often enough for one extra (cheap) test to be
> an issue. (You should change the elog in that function to an ereport,
> too, since it's going to be a user-facing error message now.)
okay, I have taken care of above two points in the attached patch. Thanks.