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

Yes , You can make use of .select in scala.

Use .head and .tail to select the whole values mentioned in the List()

Example

val cols = List("b", "c")
df.select(cols.head,cols.tail: _*)

Explanation