Help with a case

[Maatary]

Hi,

-i have this case where i need to read a very large csv file, filter some of the line based on some criteria and then write the ouptput in a new file.

I'm not sure how to commbine the in and out with katan in such a way that i get the header on read, and the header on write too.

Before i keep dig in more than i already did maybe someone can tell me if it is feasable ?