ignoring primary key violations in COPY command

Hi all,
We are importing the data from the CSV file into the database using COPY
command. But when the 'primary key ' violation occurs , it stops
Then and there and data is not updated into the tables. Also in the CSV
file the number of columns is not fixed , its varies
In number , it can range anywhere between 1 -22, I need to figure out a
way such that I need to update only those columns which are present
In the CSV file . This of course I would like to accomplish using COPY
command , Please let me know if at all this is possible in postgresql
8.1

Thanks and regards,
Rajendra Singh

Wipro Technologies
Plot No. 72, Hosur Main road
Keonics Electronics City
Bangalore- 560100, INDIA
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