conditional split

hi,

my package is putting data into final table, which has 1 date, i need to check wheathere this date is less than current date ,then i need to pu that date into text file.

the problem is, everytime my package run , it will check for all the rows in table.

now my table will have 1 or more row will added every time it runs,but conditional split will check for all the rows.

how do i make confition split, to check for the rows that is new one