Alvaro Herrera <alvherre@commandprompt.com> writes:
> Tom Lane wrote:
>> As far as getting out of the situation, the only really good answer is a
>> dump and reload. I can't think of any simple way of getting rid of the
>> bogus row, but what you should be able to do to let pg_dump work is to
>> rename misp to something else. You can rename it back after getting
>> through the dump/reload, of course.
> Or roll the XID counter back, vacuum the table, and restore the XID to
> the original value. This is done with pg_resetxlog, though I am not
> sure if we shipped it in 7.3.
That seems fairly hazardous, in particular there might be undesirable
side-effects on other system catalogs while you are running with the
set-back XID counter.
Also, I see no very good reason to assume that this is the only
wraparound problem present in the DB. A dump and reload would probably
be useful to help check for other inconsistencies.
regards, tom lane