How to change a column position in a spark dataframe?

Question

I was wondering if it is possible to change the position of a column in a dataframe, actually to change the schema?

Precisely if I have got a dataframe like [f

Answer 1

Like others have commented, I'm curious to know why would you do this as the order is not relevant when you can query the columns by their names.

Anyway, using a select should give the feeling the columns have moved in schema description:

val data = Seq(
  ("a",       "hello", 1),
  ("b",       "spark", 2)
)
.toDF("field1", "field2", "field3")

data
 .show()

data
 .select("field3", "field2", "field1")
 .show()