Re: RDD to DataFrame question with JsValue in the mix

[Dood]

On 7/1/2016 6:42 AM, Akhil Das wrote:

case class Holder(str: String, js:JsValue)


Hello,

Thanks!

I tried that before posting the question to the list but I keep getting 
an error such as this even after the map() operation to convert 
(String,JsValue) -> Holder and then toDF().


I am simply invoking the following:

val rddDF:DataFrame = rdd.map(x => Holder(x._1,x._2)).toDF
rddDF.registerTempTable("rddf")

rddDF.schema.mkString(",")


And getting the following:

[2016-07-01 11:57:02,720] WARN  .jobserver.JobManagerActor [] 
[akka://JobServer/user/context-supervisor/test] - Exception from job 
d4c9d145-92bf-4c64-8904-91c917bd61d3:
java.lang.UnsupportedOperationException: Schema for type 
play.api.libs.json.JsValue is not supported
at 
org.apache.spark.sql.catalyst.ScalaReflection$class.schemaFor(ScalaReflection.scala:718)
at 
org.apache.spark.sql.catalyst.ScalaReflection$.schemaFor(ScalaReflection.scala:30)
at 
org.apache.spark.sql.catalyst.ScalaReflection$$anonfun$schemaFor$1.apply(ScalaReflection.scala:693)
at 
org.apache.spark.sql.catalyst.ScalaReflection$$anonfun$schemaFor$1.apply(ScalaReflection.scala:691)
at 
scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:244)
at 
scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:244)

at scala.collection.immutable.List.foreach(List.scala:318)
at 
scala.collection.TraversableLike$class.map(TraversableLike.scala:244)

at scala.collection.AbstractTraversable.map(Traversable.scala:105)
at 
org.apache.spark.sql.catalyst.ScalaReflection$class.schemaFor(ScalaReflection.scala:691)
at 
org.apache.spark.sql.catalyst.ScalaReflection$.schemaFor(ScalaReflection.scala:30)
at 
org.apache.spark.sql.catalyst.ScalaReflection$class.schemaFor(ScalaReflection.scala:630)
at 
org.apache.spark.sql.catalyst.ScalaReflection$.schemaFor(ScalaReflection.scala:30)
at 
org.apache.spark.sql.SQLContext.createDataFrame(SQLContext.scala:414)
at 
org.apache.spark.sql.SQLImplicits.rddToDataFrameHolder(SQLImplicits.scala:94)




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Re: RDD to DataFrame question with JsValue in the mix

[Akhil Das]

Something like this?

import sqlContext.implicits._
case class Holder(str: String, js:JsValue)

yourRDD.map(x => Holder(x._1, x._2)).toDF()



On Fri, Jul 1, 2016 at 3:36 AM, Dood@ODDO  wrote:

> Hello,
>
> I have an RDD[(String,JsValue)] that I want to convert into a DataFrame
> and then run SQL on. What is the easiest way to get the JSON (in form of
> JsValue) "understood" by the process?
>
> Thanks!
>
> -
> To unsubscribe e-mail: user-unsubscr...@spark.apache.org
>
>


-- 
Cheers!