Not that I recommend it, but you could do:
index on iif(left(myfield, 1) = '/', myfield + space(1), '?' + myfield) tag mywierdindex
So if myfield starts with a slash we add a space to the end of the string, if it is not we add a question mark (or any other character whose ASCII value is greater than the ASCII value of the slash) at the beginning (the space is added so both strings have the same length)
But I think you should look into other solutions.
"The five senses obstruct or deform the apprehension of reality."
Jorge L. Borges?
"Premature optimization is the root of all evil in programming."
Donald Knuth, repeating C. A. R. Hoare
"To die for a religion is easier than to live it absolutely"
Jorge L. Borges
