Format columns

[nichu05]

is there a way to define the date format for the col = "to_date(date,'yyyymmdd') in pg_bulkload?
Can we ignore some columns or add dummy columns while loading to database?
for eg:
I have the below columns in my input file
colA
colB
colC
colD

in database:
colA
colB
(no colC in database table)
colD
colF (additional column in database table)