Sebastien Boisvert <sebastienboisvert(at)yahoo(dot)com> writes:
>> Hmm, no sign of any such row here ... try reindexing pg_attribute.
> It gets more interesting:
> MCS=# reindex table pg_attribute;
> ERROR: could not access status of transaction 276828288
> DETAIL: Could not open file "pg_subtrans/1080": No such file or directory.
So you've got some amount of corruption in pg_attribute --- probably
more than just one row affected. You're fortunate that only one table
was not dumpable.
If you have a reasonably recent backup for that table, I agree that
further effort probably isn't warranted.
regards, tom lane