Applying distance functions between two columns of a table

Good evening,

assume, I have a table which contains (amongst others) two columns. Using the "Distance Functions" nodes, I would like to calculate the distance between the the values in those columns for each row. Creating a distance matrix is overkill for the use case, as I only have a set of dedicated pairs between which I want to calculate the distance. Ideas, anybody?


You could use the math node to do a simple calculation.

Yeah, but in my concrete use case I need to calculate String distances between two columns (e.g. levenshtein("abc", "abcd")).