Why do you use parameter mapping in a calculation view?

Parameter mapping in SAP HANA calculation views serves several purposes:

To push down filters to the lowest level calculation views:By mapping input parameters from a higher-level calculation view to those in underlying views, filters applied at the top level are propagated down to the base views. This ensures that data is filtered as early as possible in the data processing pipeline, reducing the volume of data transferred and processed, thereby enhancing performance.

SAP Learning

To pass variable values to external value help views:When using external views to provide value help (i.e., lists of possible values) for variables or input parameters, parameter mapping allows the values entered by the user to be passed to these external views. This enables dynamic and context-sensitive value help, improving the user experience by presenting relevant options based on prior selections.

SAP Learning

Options B and D are not correct in this context:

To convert the data types of input parameters:Parameter mapping does not inherently perform data type conversion. Data type consistency must be ensured when defining input parameters and their mappings.

To assign variables to one or more attributes:Parameter mapping is not used to assign variables to attributes; rather, it links input parameters and variables between different calculation views or external sources.