SPARK/SQL:spark can't resolve symbol toDF

Question

In my project, my external library is spark-assembly-1.3.1-hadoop2.6.0, if I press \'.\', the IDE inform me toDF(), but it inform me that can\'t resolv

Answer 1

To be able to to use toDF you have to import sqlContext.implicits first:

val sqlContext = new org.apache.spark.sql.SQLContext(sc)
import sqlContext.implicits._

case class Foobar(foo: String, bar: Integer)

val foobarRdd = sc.parallelize(("foo", 1) :: ("bar", 2) :: ("baz", -1) :: Nil).
    map { case (foo, bar) => Foobar(foo, bar) } 

val foobarDf = foobarRdd.toDF
foobarDf.limit(1).show