Error- Input Parameter on SQL Script CV

Hi Gurus,

I have below sql script.... and i have to do the in HAN CV SQL Script.

Session_context('Poper') = Input_Paramaeter(hana)

Input Parameter = Period

---     Map((session_context('poper'), '01'),  tsl01, 0)    ) LOCALCURRENCY

Decode is

if( input parameter = '01', 'tsl01', '0')

I am unable to write the above formula in SQL Script.

-SLS...