"Shinji Nakajima" <sinakaj(at)jops(dot)co(dot)jp> writes:
> Error message called "missing chunk number" occurred when I did select of
> the specific column of the specific table.
This might indicate that the toast table's index was corrupted.
> I delete a record, and the system restores, but prime cause is unknown.
> Will this be a bug of the databases?
Perhaps, but there's not a lot we can do without a lot more information...
regards, tom lane