"Vernon Smith" <vwu98034@lycos.com> writes:
> When I try to delete data from one table, I get this error:
> ERROR: get_typdefault: failed to lookup type 0
> I can't find any reasons other than a bug. The PG version is 7.3.4
You'll need to provide a self-contained test case.
We've seen bugs with similar symptoms associated with dropped columns,
but AFAIK they are all fixed in 7.3.4.
regards, tom lane