How do I implement multiple rename commands based on user input

[actionabledata]

I have a single algorithm with 2 methods. Each method produces the same type of data but with different fields names to keep them separated. The dashboard charts depend on which method the user selects in a menu.

Essentially I create interim results for both methods but desire to change the names to the field names used in the subsequent code.

[Q] What is a more efficient method of performing the "Big Switch" in the run anywhere code below?

| makeresults 5

| rename comment AS "-----------------------------------------------------------------"
| rename comment AS "User Menu Selection"
| eval switch="A"

| rename comment AS "-----------------------------------------------------------------"
| rename comment AS "Algorithm element2"
| eval calcMethod1_field1="1"
| eval calcMethod1_field2=2
| eval calcMethod1_field3=3
| eval calcMethod1_field4=4
| eval calcMethod1_field5=5

| rename comment AS "-----------------------------------------------------------------"
| rename comment AS "Algorithm element2"
| eval calcMethod2_field1="1sub"
| eval calcMethod2_field2="2sub"
| eval calcMethod2_field3="3sub"
| eval calcMethod2_field4="4sub"
| eval calcMethod2_field5="5sub"

| rename comment AS "-----------------------------------------------------------------"
| rename comment AS "                    Big Switch                                   " 
| rename comment AS "-----------------------------------------------------------------"
| rename comment AS "This is the big switch before entering a stats command"
| rename comment AS "Intent is to rename several fields depending on switch value"
| eval fieldnameforstats_field1=case(switch=="A",calcMethod1_field1,switch=="B",calcMethod2_field1)
| eval fieldnameforstats_field2=case(switch=="A",calcMethod1_field2,switch=="B",calcMethod2_field2)
| eval fieldnameforstats_field3=case(switch=="A",calcMethod1_field3,switch=="B",calcMethod2_field3)
| eval fieldnameforstats_field4=case(switch=="A",calcMethod1_field4,switch=="B",calcMethod2_field4)
| eval fieldnameforstats_field5=case(switch=="A",calcMethod1_field5,switch=="B",calcMethod2_field5)

| fields - _time

| table fieldnameforstats_field*