Validity data in BUT021_FS in CDS-views

HI,

we are preparing some CDS-views for student data.

Most of these data have real validity-dates in DATE-format.

Only the validity of address-data in BUT021_FS is not a real date, but a timestamp - which is a number.

Up to now we use 2 parameters as input for the CDS: the date as a real DATE, and the same date as a number.

We would like to use the same input for the validity of both series of data.

So we want to change the timestamps into dates. In a CDS we divided the timestamp bij 1000 000 to get the actual date. But this gives us a number, and this is not compatible to the dates in other tables.

Is there a way to convert these numbers and dates so we can use one parameter for all?

Thanks.

Kris