how to call a specific calculation view based on an input parameter?

I have the below requirement and I want to achieve it in graphical calculation view.

scenario:

if :RTP_TYPE = 'A'

Select * FROM "_SYS_BIC"."test_schema/test_cv1"

elseif :RTP_TYPE = 'B'

Select * FROM "_SYS_BIC"."test_schema/test_cv2"

else

Select * FROM "_SYS_BIC"."test_schema/test_cv3"

Note: RTP_TYPE is an input parameter and doesn't present in any of the CV output or physical table. 

Regards,

Deba