Hi Ted, That doesn't help neither as one method delegates to another as far as I can see:
def collect_list(columnName: String): Column = collect_list(Column(columnName)) Thanks, Alex On Mon, Feb 1, 2016 at 5:55 PM, Ted Yu <yuzhih...@gmail.com> wrote: > bq. agg(collect_list("b") > > Have you tried: > > agg(collect_list($"b") > > On Mon, Feb 1, 2016 at 8:50 AM, Alexandr Dzhagriev <dzh...@gmail.com> > wrote: > >> Hello, >> >> I'm trying to run the following example code: >> >> import org.apache.spark.sql.hive.HiveContext >> import org.apache.spark.{SparkContext, SparkConf} >> import org.apache.spark.sql.functions._ >> >> >> case class RecordExample(a: Int, b: String) >> >> object ArrayExample { >> def main(args: Array[String]) { >> val conf = new SparkConf() >> >> val sc = new SparkContext(conf) >> val sqlContext = new HiveContext(sc) >> >> import sqlContext.implicits._ >> >> val dataset = sc.parallelize(Seq(RecordExample(1, "apple"), >> RecordExample(2, "orange"))).toDS() >> >> dataset.groupBy($"a").agg(collect_list("b").as[List[String]]) >> >> dataset.collect() >> >> } >> >> } >> >> >> and it fails with the following (please see the whole stack trace below): >> >> Exception in thread "main" java.lang.ClassCastException: >> org.apache.spark.sql.types.ArrayType cannot be cast to >> org.apache.spark.sql.types.StructType >> >> >> Could please someone point me to the proper way to do that or confirm >> it's a bug? >> >> Thank you and here is the whole stacktrace: >> >> Exception in thread "main" java.lang.ClassCastException: >> org.apache.spark.sql.types.ArrayType cannot be cast to >> org.apache.spark.sql.types.StructType >> at org.apache.spark.sql.catalyst.expressions.GetStructField.org >> $apache$spark$sql$catalyst$expressions$GetStructField$$field$lzycompute(complexTypeExtractors.scala:107) >> at org.apache.spark.sql.catalyst.expressions.GetStructField.org >> $apache$spark$sql$catalyst$expressions$GetStructField$$field(complexTypeExtractors.scala:107) >> at >> org.apache.spark.sql.catalyst.expressions.GetStructField.dataType(complexTypeExtractors.scala:109) >> at >> org.apache.spark.sql.catalyst.analysis.ResolveUpCast$$anonfun$apply$24.applyOrElse(Analyzer.scala:1214) >> at >> org.apache.spark.sql.catalyst.analysis.ResolveUpCast$$anonfun$apply$24.applyOrElse(Analyzer.scala:1211) >> at >> org.apache.spark.sql.catalyst.trees.TreeNode$$anonfun$3.apply(TreeNode.scala:243) >> at >> org.apache.spark.sql.catalyst.trees.TreeNode$$anonfun$3.apply(TreeNode.scala:243) >> at >> org.apache.spark.sql.catalyst.trees.CurrentOrigin$.withOrigin(TreeNode.scala:53) >> at >> org.apache.spark.sql.catalyst.trees.TreeNode.transformDown(TreeNode.scala:242) >> at >> org.apache.spark.sql.catalyst.trees.TreeNode$$anonfun$transformDown$1.apply(TreeNode.scala:248) >> at >> org.apache.spark.sql.catalyst.trees.TreeNode$$anonfun$transformDown$1.apply(TreeNode.scala:248) >> at >> org.apache.spark.sql.catalyst.trees.TreeNode$$anonfun$4.apply(TreeNode.scala:265) >> at scala.collection.Iterator$$anon$11.next(Iterator.scala:370) >> at scala.collection.Iterator$class.foreach(Iterator.scala:742) >> at scala.collection.AbstractIterator.foreach(Iterator.scala:1194) >> at >> scala.collection.generic.Growable$class.$plus$plus$eq(Growable.scala:59) >> at >> scala.collection.mutable.ArrayBuffer.$plus$plus$eq(ArrayBuffer.scala:104) >> at >> scala.collection.mutable.ArrayBuffer.$plus$plus$eq(ArrayBuffer.scala:48) >> at scala.collection.TraversableOnce$class.to(TraversableOnce.scala:308) >> at scala.collection.AbstractIterator.to(Iterator.scala:1194) >> at >> scala.collection.TraversableOnce$class.toBuffer(TraversableOnce.scala:300) >> at scala.collection.AbstractIterator.toBuffer(Iterator.scala:1194) >> at >> scala.collection.TraversableOnce$class.toArray(TraversableOnce.scala:287) >> at scala.collection.AbstractIterator.toArray(Iterator.scala:1194) >> at >> org.apache.spark.sql.catalyst.trees.TreeNode.transformChildren(TreeNode.scala:305) >> at >> org.apache.spark.sql.catalyst.trees.TreeNode.transformDown(TreeNode.scala:248) >> at >> org.apache.spark.sql.catalyst.trees.TreeNode$$anonfun$transformDown$1.apply(TreeNode.scala:248) >> at >> org.apache.spark.sql.catalyst.trees.TreeNode$$anonfun$transformDown$1.apply(TreeNode.scala:248) >> at >> org.apache.spark.sql.catalyst.trees.TreeNode$$anonfun$4.apply(TreeNode.scala:265) >> at scala.collection.Iterator$$anon$11.next(Iterator.scala:370) >> at scala.collection.Iterator$class.foreach(Iterator.scala:742) >> at scala.collection.AbstractIterator.foreach(Iterator.scala:1194) >> at >> scala.collection.generic.Growable$class.$plus$plus$eq(Growable.scala:59) >> at >> scala.collection.mutable.ArrayBuffer.$plus$plus$eq(ArrayBuffer.scala:104) >> at >> scala.collection.mutable.ArrayBuffer.$plus$plus$eq(ArrayBuffer.scala:48) >> at scala.collection.TraversableOnce$class.to(TraversableOnce.scala:308) >> at scala.collection.AbstractIterator.to(Iterator.scala:1194) >> at >> scala.collection.TraversableOnce$class.toBuffer(TraversableOnce.scala:300) >> at scala.collection.AbstractIterator.toBuffer(Iterator.scala:1194) >> at >> scala.collection.TraversableOnce$class.toArray(TraversableOnce.scala:287) >> at scala.collection.AbstractIterator.toArray(Iterator.scala:1194) >> at >> org.apache.spark.sql.catalyst.trees.TreeNode.transformChildren(TreeNode.scala:305) >> at >> org.apache.spark.sql.catalyst.trees.TreeNode.transformDown(TreeNode.scala:248) >> at >> org.apache.spark.sql.catalyst.trees.TreeNode$$anonfun$transformDown$1.apply(TreeNode.scala:248) >> at >> org.apache.spark.sql.catalyst.trees.TreeNode$$anonfun$transformDown$1.apply(TreeNode.scala:248) >> at >> org.apache.spark.sql.catalyst.trees.TreeNode$$anonfun$4$$anonfun$apply$9.apply(TreeNode.scala:294) >> at >> scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:245) >> at >> scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:245) >> at scala.collection.immutable.List.foreach(List.scala:381) >> at scala.collection.TraversableLike$class.map(TraversableLike.scala:245) >> at scala.collection.immutable.List.map(List.scala:285) >> at >> org.apache.spark.sql.catalyst.trees.TreeNode$$anonfun$4.apply(TreeNode.scala:292) >> at scala.collection.Iterator$$anon$11.next(Iterator.scala:370) >> at scala.collection.Iterator$class.foreach(Iterator.scala:742) >> at scala.collection.AbstractIterator.foreach(Iterator.scala:1194) >> at >> scala.collection.generic.Growable$class.$plus$plus$eq(Growable.scala:59) >> at >> scala.collection.mutable.ArrayBuffer.$plus$plus$eq(ArrayBuffer.scala:104) >> at >> scala.collection.mutable.ArrayBuffer.$plus$plus$eq(ArrayBuffer.scala:48) >> at scala.collection.TraversableOnce$class.to(TraversableOnce.scala:308) >> at scala.collection.AbstractIterator.to(Iterator.scala:1194) >> at >> scala.collection.TraversableOnce$class.toBuffer(TraversableOnce.scala:300) >> at scala.collection.AbstractIterator.toBuffer(Iterator.scala:1194) >> at >> scala.collection.TraversableOnce$class.toArray(TraversableOnce.scala:287) >> at scala.collection.AbstractIterator.toArray(Iterator.scala:1194) >> at >> org.apache.spark.sql.catalyst.trees.TreeNode.transformChildren(TreeNode.scala:305) >> at >> org.apache.spark.sql.catalyst.trees.TreeNode.transformDown(TreeNode.scala:248) >> at >> org.apache.spark.sql.catalyst.trees.TreeNode$$anonfun$transformDown$1.apply(TreeNode.scala:248) >> at >> org.apache.spark.sql.catalyst.trees.TreeNode$$anonfun$transformDown$1.apply(TreeNode.scala:248) >> at >> org.apache.spark.sql.catalyst.trees.TreeNode$$anonfun$4$$anonfun$apply$9.apply(TreeNode.scala:294) >> at >> scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:245) >> at >> scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:245) >> at >> scala.collection.mutable.ResizableArray$class.foreach(ResizableArray.scala:59) >> at scala.collection.mutable.ArrayBuffer.foreach(ArrayBuffer.scala:48) >> at scala.collection.TraversableLike$class.map(TraversableLike.scala:245) >> at scala.collection.AbstractTraversable.map(Traversable.scala:104) >> at >> org.apache.spark.sql.catalyst.trees.TreeNode$$anonfun$4.apply(TreeNode.scala:292) >> at scala.collection.Iterator$$anon$11.next(Iterator.scala:370) >> at scala.collection.Iterator$class.foreach(Iterator.scala:742) >> at scala.collection.AbstractIterator.foreach(Iterator.scala:1194) >> at >> scala.collection.generic.Growable$class.$plus$plus$eq(Growable.scala:59) >> at >> scala.collection.mutable.ArrayBuffer.$plus$plus$eq(ArrayBuffer.scala:104) >> at >> scala.collection.mutable.ArrayBuffer.$plus$plus$eq(ArrayBuffer.scala:48) >> at scala.collection.TraversableOnce$class.to(TraversableOnce.scala:308) >> at scala.collection.AbstractIterator.to(Iterator.scala:1194) >> at >> scala.collection.TraversableOnce$class.toBuffer(TraversableOnce.scala:300) >> at scala.collection.AbstractIterator.toBuffer(Iterator.scala:1194) >> at >> scala.collection.TraversableOnce$class.toArray(TraversableOnce.scala:287) >> at scala.collection.AbstractIterator.toArray(Iterator.scala:1194) >> at >> org.apache.spark.sql.catalyst.trees.TreeNode.transformChildren(TreeNode.scala:305) >> at >> org.apache.spark.sql.catalyst.trees.TreeNode.transformDown(TreeNode.scala:248) >> at >> org.apache.spark.sql.catalyst.trees.TreeNode$$anonfun$transformDown$1.apply(TreeNode.scala:248) >> at >> org.apache.spark.sql.catalyst.trees.TreeNode$$anonfun$transformDown$1.apply(TreeNode.scala:248) >> at >> org.apache.spark.sql.catalyst.trees.TreeNode$$anonfun$4.apply(TreeNode.scala:265) >> at scala.collection.Iterator$$anon$11.next(Iterator.scala:370) >> at scala.collection.Iterator$class.foreach(Iterator.scala:742) >> at scala.collection.AbstractIterator.foreach(Iterator.scala:1194) >> at >> scala.collection.generic.Growable$class.$plus$plus$eq(Growable.scala:59) >> at >> scala.collection.mutable.ArrayBuffer.$plus$plus$eq(ArrayBuffer.scala:104) >> at >> scala.collection.mutable.ArrayBuffer.$plus$plus$eq(ArrayBuffer.scala:48) >> at scala.collection.TraversableOnce$class.to(TraversableOnce.scala:308) >> at scala.collection.AbstractIterator.to(Iterator.scala:1194) >> at >> scala.collection.TraversableOnce$class.toBuffer(TraversableOnce.scala:300) >> at scala.collection.AbstractIterator.toBuffer(Iterator.scala:1194) >> at >> scala.collection.TraversableOnce$class.toArray(TraversableOnce.scala:287) >> at scala.collection.AbstractIterator.toArray(Iterator.scala:1194) >> at >> org.apache.spark.sql.catalyst.trees.TreeNode.transformChildren(TreeNode.scala:305) >> at >> org.apache.spark.sql.catalyst.trees.TreeNode.transformDown(TreeNode.scala:248) >> at >> org.apache.spark.sql.catalyst.plans.QueryPlan.transformExpressionDown$1(QueryPlan.scala:75) >> at org.apache.spark.sql.catalyst.plans.QueryPlan.org >> $apache$spark$sql$catalyst$plans$QueryPlan$$recursiveTransform$1(QueryPlan.scala:85) >> at >> org.apache.spark.sql.catalyst.plans.QueryPlan$$anonfun$org$apache$spark$sql$catalyst$plans$QueryPlan$$recursiveTransform$1$1.apply(QueryPlan.scala:89) >> at >> scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:245) >> at >> scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:245) >> at scala.collection.immutable.List.foreach(List.scala:381) >> at scala.collection.TraversableLike$class.map(TraversableLike.scala:245) >> at scala.collection.immutable.List.map(List.scala:285) >> at org.apache.spark.sql.catalyst.plans.QueryPlan.org >> $apache$spark$sql$catalyst$plans$QueryPlan$$recursiveTransform$1(QueryPlan.scala:89) >> at >> org.apache.spark.sql.catalyst.plans.QueryPlan$$anonfun$1.apply(QueryPlan.scala:93) >> at scala.collection.Iterator$$anon$11.next(Iterator.scala:370) >> at scala.collection.Iterator$class.foreach(Iterator.scala:742) >> at scala.collection.AbstractIterator.foreach(Iterator.scala:1194) >> at >> scala.collection.generic.Growable$class.$plus$plus$eq(Growable.scala:59) >> at >> scala.collection.mutable.ArrayBuffer.$plus$plus$eq(ArrayBuffer.scala:104) >> at >> scala.collection.mutable.ArrayBuffer.$plus$plus$eq(ArrayBuffer.scala:48) >> at scala.collection.TraversableOnce$class.to(TraversableOnce.scala:308) >> at scala.collection.AbstractIterator.to(Iterator.scala:1194) >> at >> scala.collection.TraversableOnce$class.toBuffer(TraversableOnce.scala:300) >> at scala.collection.AbstractIterator.toBuffer(Iterator.scala:1194) >> at >> scala.collection.TraversableOnce$class.toArray(TraversableOnce.scala:287) >> at scala.collection.AbstractIterator.toArray(Iterator.scala:1194) >> at >> org.apache.spark.sql.catalyst.plans.QueryPlan.transformExpressionsDown(QueryPlan.scala:93) >> at >> org.apache.spark.sql.catalyst.plans.QueryPlan.transformExpressions(QueryPlan.scala:64) >> at >> org.apache.spark.sql.catalyst.plans.QueryPlan$$anonfun$transformAllExpressions$1.applyOrElse(QueryPlan.scala:134) >> at >> org.apache.spark.sql.catalyst.plans.QueryPlan$$anonfun$transformAllExpressions$1.applyOrElse(QueryPlan.scala:133) >> at >> org.apache.spark.sql.catalyst.trees.TreeNode$$anonfun$3.apply(TreeNode.scala:243) >> at >> org.apache.spark.sql.catalyst.trees.TreeNode$$anonfun$3.apply(TreeNode.scala:243) >> at >> org.apache.spark.sql.catalyst.trees.CurrentOrigin$.withOrigin(TreeNode.scala:53) >> at >> org.apache.spark.sql.catalyst.trees.TreeNode.transformDown(TreeNode.scala:242) >> at >> org.apache.spark.sql.catalyst.trees.TreeNode.transform(TreeNode.scala:233) >> at >> org.apache.spark.sql.catalyst.plans.QueryPlan.transformAllExpressions(QueryPlan.scala:133) >> at >> org.apache.spark.sql.catalyst.analysis.ResolveUpCast$.apply(Analyzer.scala:1211) >> at >> org.apache.spark.sql.catalyst.analysis.ResolveUpCast$.apply(Analyzer.scala:1195) >> at >> org.apache.spark.sql.catalyst.rules.RuleExecutor$$anonfun$execute$1$$anonfun$apply$1.apply(RuleExecutor.scala:83) >> at >> org.apache.spark.sql.catalyst.rules.RuleExecutor$$anonfun$execute$1$$anonfun$apply$1.apply(RuleExecutor.scala:80) >> at >> scala.collection.LinearSeqOptimized$class.foldLeft(LinearSeqOptimized.scala:124) >> at scala.collection.immutable.List.foldLeft(List.scala:84) >> at >> org.apache.spark.sql.catalyst.rules.RuleExecutor$$anonfun$execute$1.apply(RuleExecutor.scala:80) >> at >> org.apache.spark.sql.catalyst.rules.RuleExecutor$$anonfun$execute$1.apply(RuleExecutor.scala:72) >> at scala.collection.immutable.List.foreach(List.scala:381) >> at >> org.apache.spark.sql.catalyst.rules.RuleExecutor.execute(RuleExecutor.scala:72) >> at >> org.apache.spark.sql.catalyst.encoders.ExpressionEncoder.resolve(ExpressionEncoder.scala:253) >> at org.apache.spark.sql.Dataset.<init>(Dataset.scala:78) >> at >> org.apache.spark.sql.GroupedDataset.aggUntyped(GroupedDataset.scala:240) >> at org.apache.spark.sql.GroupedDataset.agg(GroupedDataset.scala:253) >> at ArrayExample$.main(ArrayExample.scala:22) >> at ArrayExample.main(ArrayExample.scala) >> 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.deploy.SparkSubmit$.org$apache$spark$deploy$SparkSubmit$$runMain(SparkSubmit.scala:731) >> at org.apache.spark.deploy.SparkSubmit$.doRunMain$1(SparkSubmit.scala:181) >> at org.apache.spark.deploy.SparkSubmit$.submit(SparkSubmit.scala:206) >> at org.apache.spark.deploy.SparkSubmit$.main(SparkSubmit.scala:121) >> at org.apache.spark.deploy.SparkSubmit.main(SparkSubmit.scala) >> >> >> >> >