Hi,
Both Join and Calc Engines will be used in this case.
To check this:
Create an Attribute View and call it in Calculation View.
Then write SQL query for calling calculation view in SQL console, then R-Click on it and select "Visualize Plan" and see which engines are being hit.
Copying Lar's reply from The SAP HANA Engines?:
The Plan Operators (POPs) you find in there - represented by the boxes in the graph - are named based on a naming scheme like this:
JE<operator_name> => Join Engine (Attribute views, plain SQL)
BW<operator_name> => Olap Engine (Analytic views)
CE<operator_name> => Calc Engine (Analytic views with calculated attributes, Calculation views)
In addition check the below thread to know more about HANA engines:
Regards,
Vivek