Returns all array values from the current looping row in a single string, with each value separated by a tab, roughly equivalent to this:
[PREFIX-pos 0](tab)[PREFIX-pos 1](tab)[PREFIX-pos 2](tab)[...]
for however many fields were returned in that row.
This is useful as a quick way to see all your results at a glance and verify your search specification.
If the optional start_column attribute is given, the output starts with that column instead of column 0.