Upacking a list to select multiple columns from a spark data frame

Question

I have a spark data frame df. Is there a way of sub selecting a few columns using a list of these columns?

scala> df.columns
res0: Array[Stri         


        

Answer 1

You can typecast String to spark column like this:

import org.apache.spark.sql.functions._
df.select(cols.map(col): _*)