Hello
After I converted the dataframe to RDD I found the data type was
missing.
scala> df.show
+----+---+
|name|age|
+----+---+
|jone| 12|
|rosa| 21|
+----+---+
scala> df.printSchema
root
|-- name: string (nullable = true)
|-- age: integer (nullable = false)
scala> df.rdd.map{ row => (row(0),row(1)) }.collect
res9: Array[(Any, Any)] = Array((jone,12), (rosa,21))
As you see above, the element's data type becomes (Any,Any).
Can you help with this issue?
Thanks
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