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From "sachin aggarwal (JIRA)" <j...@apache.org>
Subject [jira] [Created] (SPARK-12117) Column Aliases are Ignored in callUDF while using struct()
Date Thu, 03 Dec 2015 05:39:10 GMT
sachin aggarwal created SPARK-12117:
---------------------------------------

             Summary: Column Aliases are Ignored in callUDF while using struct()
                 Key: SPARK-12117
                 URL: https://issues.apache.org/jira/browse/SPARK-12117
             Project: Spark
          Issue Type: Bug
          Components: SQL
    Affects Versions: 1.5.1
            Reporter: sachin aggarwal


case where this works:
val TestDoc1 = sqlContext.createDataFrame(Seq(("sachin aggarwal", "1"), ("Rishabh", "2"))).toDF("myText",
"id")
TestDoc1.select(callUDF("mydef",struct($"myText".as("Text"),$"id".as("label"))).as("col1")).show


steps to reproduce:
1)create a file copy following text--filename(a.json)

{	"myText": "Mauricio A. Hernandez",	"id": "1"}
{	"myText": "Popa, Lucian",	"id": "2"}

2)define a simple UDF
def mydef(r:Row)={println(r.schema); r.getAs("Text").asInstanceOf[String]}

3)register the udf 
 sqlContext.udf.register("mydef" ,mydef _)

4)read the input file 
val TestDoc2=sqlContext.read.json("/tmp/a.json")

5)make a call to UDF
TestDoc2.select(callUDF("mydef",struct($"myText".as("Text"),$"id".as("label"))).as("col1")).explain(true)

ERROR received:
java.lang.IllegalArgumentException: Field "Text" does not exist.
 at org.apache.spark.sql.types.StructType$$anonfun$fieldIndex$1.apply(StructType.scala:234)
 at org.apache.spark.sql.types.StructType$$anonfun$fieldIndex$1.apply(StructType.scala:234)
 at scala.collection.MapLike$class.getOrElse(MapLike.scala:128)
 at scala.collection.AbstractMap.getOrElse(Map.scala:58)
 at org.apache.spark.sql.types.StructType.fieldIndex(StructType.scala:233)
 at org.apache.spark.sql.catalyst.expressions.GenericRowWithSchema.fieldIndex(rows.scala:212)
 at org.apache.spark.sql.Row$class.getAs(Row.scala:325)
 at org.apache.spark.sql.catalyst.expressions.GenericRow.getAs(rows.scala:191)
 at $line414.$read$$iwC$$iwC$$iwC$$iwC$$iwC$$iwC$$iwC$$iwC$$iwC$$iwC$$iwC$$$$$$c57ec8bf9b0d5f6161b97741d596ff0$$$$wC$$iwC$$iwC$$iwC$$iwC$$iwC$$iwC$$iwC$$iwC$$iwC$$iwC$$iwC$$iwC$$iwC$$iwC$$iwC.mydef(<console>:107)
 at $line419.$read$$iwC$$iwC$$iwC$$iwC$$iwC$$iwC$$iwC$$iwC$$iwC$$iwC$$iwC$$$$$$c57ec8bf9b0d5f6161b97741d596ff0$$$$wC$$iwC$$iwC$$iwC$$iwC$$iwC$$iwC$$iwC$$iwC$$iwC$$iwC$$iwC$$iwC$$iwC$$iwC$$iwC$$anonfun$1.apply(<console>:110)
 at $line419.$read$$iwC$$iwC$$iwC$$iwC$$iwC$$iwC$$iwC$$iwC$$iwC$$iwC$$iwC$$$$$$c57ec8bf9b0d5f6161b97741d596ff0$$$$wC$$iwC$$iwC$$iwC$$iwC$$iwC$$iwC$$iwC$$iwC$$iwC$$iwC$$iwC$$iwC$$iwC$$iwC$$iwC$$anonfun$1.apply(<console>:110)
 at org.apache.spark.sql.catalyst.expressions.ScalaUDF$$anonfun$2.apply(ScalaUDF.scala:75)
 at org.apache.spark.sql.catalyst.expressions.ScalaUDF$$anonfun$2.apply(ScalaUDF.scala:74)
 at org.apache.spark.sql.catalyst.expressions.ScalaUDF.eval(ScalaUDF.scala:964)
 at org.apache.spark.sql.catalyst.expressions.GeneratedClass$SpecificMutableProjection.apply(Unknown
Source)
 at org.apache.spark.sql.execution.Project$$anonfun$1$$anonfun$apply$2.apply(basicOperators.scala:55)
 at org.apache.spark.sql.execution.Project$$anonfun$1$$anonfun$apply$2.apply(basicOperators.scala:53)
 at scala.collection.Iterator$$anon$11.next(Iterator.scala:328)
 at scala.collection.Iterator$$anon$11.next(Iterator.scala:328)
 at scala.collection.Iterator$$anon$10.next(Iterator.scala:312)
 at scala.collection.Iterator$class.foreach(Iterator.scala:727)
 at scala.collection.AbstractIterator.foreach(Iterator.scala:1157)
 at scala.collection.generic.Growable$class.$plus$plus$eq(Growable.scala:48)
 at scala.collection.mutable.ArrayBuffer.$plus$plus$eq(ArrayBuffer.scala:103)
 at scala.collection.mutable.ArrayBuffer.$plus$plus$eq(ArrayBuffer.scala:47)
 at scala.collection.TraversableOnce$class.to(TraversableOnce.scala:273)
 at scala.collection.AbstractIterator.to(Iterator.scala:1157)
 at scala.collection.TraversableOnce$class.toBuffer(TraversableOnce.scala:265)
 at scala.collection.AbstractIterator.toBuffer(Iterator.scala:1157)
 at scala.collection.TraversableOnce$class.toArray(TraversableOnce.scala:252)
 at scala.collection.AbstractIterator.toArray(Iterator.scala:1157)
 at org.apache.spark.sql.execution.SparkPlan$$anonfun$5.apply(SparkPlan.scala:215)
 at org.apache.spark.sql.execution.SparkPlan$$anonfun$5.apply(SparkPlan.scala:215)
 at org.apache.spark.SparkContext$$anonfun$runJob$5.apply(SparkContext.scala:1848)
 at org.apache.spark.SparkContext$$anonfun$runJob$5.apply(SparkContext.scala:1848)
 at org.apache.spark.scheduler.ResultTask.runTask(ResultTask.scala:66)
 at org.apache.spark.scheduler.Task.run(Task.scala:88)
 at org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:214)
 at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1177)
 at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:642)
 at java.lang.Thread.run(Thread.java:857)



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