How to get abap date in HANA calculated column and calculate date difference

I had a requirement to find the date difference from the field LETZTZUG of table s032 and the current date.
Here the problem was getting the current date. I got the current date using now() function in calculated column functions.
The output of the now() was in yyyy-mm-dd hrs and second. I used date(now()) and got it as yyyy-mm-dd.
With this I was still not able to use daysbetween in order to find the duedate betwen LETZTZUG  and currentdate.
Then I used replace() function to eliminate '-' from the yyyy-mm-dd. So after that I could calculate the daysbetween().
 This will overcome the problem of not having to_dats in calculated column.