Bruce Momjian <pgman@candle.pha.pa.us> writes:
>> I forgot to mention that I'd like to implement a cross
>> transaction insensitive(and read-only) cursors which
>> any proper dbms seems to have the functionality.
> That is a good idea, especially read-only, that will not require any
> locks.
If it's not holding any locks, I can guarantee you it's not insensitive.
Consider VACUUM, or even DROP TABLE.
regards, tom lane