Sorry, didn't realize the mail didn't show the code. Using Spark release
1.6.0
Below is an example to reproduce it.
import org.apache.spark.sql.SQLContext
val sqlContext = new SQLContext(sparkContext)
import sqlContext.implicits._
import org.apache.spark.sql.functions
case class Test(a:Int, b:Int)
val data = sparkContext.parallelize(Array.range(0, 10).map(x => Test(x,
x+1)))
val df = data.toDF()
val arrayCol = functions.array(df("a"), df("b")).as("arrayCol")
this throws the following exception:
ava.lang.UnsupportedOperationException
at
org.apache.spark.sql.catalyst.expressions.PrettyAttribute.nullable(namedExpressions.scala:289)
at
org.apache.spark.sql.catalyst.expressions.CreateArray$$anonfun$dataType$3.apply(complexTypeCreator.scala:40)
at
org.apache.spark.sql.catalyst.expressions.CreateArray$$anonfun$dataType$3.apply(complexTypeCreator.scala:40)
at
scala.collection.IndexedSeqOptimized$$anonfun$exists$1.apply(IndexedSeqOptimized.scala:40)
at
scala.collection.IndexedSeqOptimized$$anonfun$exists$1.apply(IndexedSeqOptimized.scala:40)
at
scala.collection.IndexedSeqOptimized$class.segmentLength(IndexedSeqOptimized.scala:189)
at
scala.collection.mutable.ArrayBuffer.segmentLength(ArrayBuffer.scala:47)
at
scala.collection.GenSeqLike$class.prefixLength(GenSeqLike.scala:92)
at scala.collection.AbstractSeq.prefixLength(Seq.scala:40)
at
scala.collection.IndexedSeqOptimized$class.exists(IndexedSeqOptimized.scala:40)
at
scala.collection.mutable.ArrayBuffer.exists(ArrayBuffer.scala:47)
at
org.apache.spark.sql.catalyst.expressions.CreateArray.dataType(complexTypeCreator.scala:40)
at
org.apache.spark.sql.catalyst.expressions.Alias.dataType(namedExpressions.scala:136)
at
org.apache.spark.sql.catalyst.expressions.NamedExpression$class.typeSuffix(namedExpressions.scala:84)
at
org.apache.spark.sql.catalyst.expressions.Alias.typeSuffix(namedExpressions.scala:120)
at
org.apache.spark.sql.catalyst.expressions.Alias.toString(namedExpressions.scala:155)
at
org.apache.spark.sql.catalyst.expressions.Expression.prettyString(Expression.scala:207)
at org.apache.spark.sql.Column.toString(Column.scala:138)
at java.lang.String.valueOf(String.java:2994)
at scala.runtime.ScalaRunTime$.stringOf(ScalaRunTime.scala:331)
at scala.runtime.ScalaRunTime$.replStringOf(ScalaRunTime.scala:337)
at .<init>(<console>:20)
at .<clinit>(<console>)
at $print(<console>)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at
org.apache.spark.repl.SparkIMain$ReadEvalPrint.call(SparkIMain.scala:1065)
at
org.apache.spark.repl.SparkIMain$Request.loadAndRun(SparkIMain.scala:1346)
at
org.apache.spark.repl.SparkIMain.loadAndRunReq$1(SparkIMain.scala:840)
at org.apache.spark.repl.SparkIMain.interpret(SparkIMain.scala:871)
at org.apache.spark.repl.SparkIMain.interpret(SparkIMain.scala:819)
On Tue, Feb 9, 2016 at 4:23 PM Ted Yu <yuzhih...@gmail.com> wrote:
> Do you mind pastebin'ning code snippet and exception one more time - I
> couldn't see them in your original email.
>
> Which Spark release are you using ?
>
> On Tue, Feb 9, 2016 at 11:55 AM, rakeshchalasani <vnit.rak...@gmail.com>
> wrote:
>
>> Hi All:
>>
>> I am getting an "UnsupportedOperationException" when trying to alias an
>> array column. The issue seems to be at "CreateArray" expression ->
>> dataType,
>> which checks for nullability of its children, while aliasing is creating a
>> PrettyAttribute that does not implement nullability.
>>
>> Below is an example to reproduce it.
>>
>>
>>
>> this throws the following exception:
>>
>>
>>
>>
>> --
>> View this message in context:
>> http://apache-spark-developers-list.1001551.n3.nabble.com/Error-aliasing-an-array-column-tp16288.html
>> Sent from the Apache Spark Developers List mailing list archive at
>> Nabble.com.
>>
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>>
>>
>
