A question about constraints.

Hullo,

I have added a constraint to a table to prevent it loading
data unless its key field is in another table (whose data
I have previously loaded)


ALTER TABLE OnMap ADD CONSTRAINT objid_check1   FOREIGN KEY (fname, lname)
                                                REFERENCES Object (fname, lname);


Indeed, the constraint works:

COPY OnMap FROM '/data/OnMap.dump' USING DELIMITERS '|'

psql:OnMap:1: ERROR:  objid_check1 referential integrity violation - key referenced
 from onmap not found in object

But... is there anyway to get PostgreSQL to tell me which record or records
are failing to load ?

I am assuming I am doing something stupid here.

Cheers

Steve