>>>> But i'm not making any compare.
>>>> I just wrote delete from table; and i receive that message.
>> 
>> Hmm. We will need to know more about your setup, since a simple
>> 
>> delete from table;
>> 
>> in psql does not involve *any* comparisons, and should never provoke the
>> message you are receiving.

Perhaps there is a foreign key constraint, or some such, being invoked
by this command?

                        regards, tom lane

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