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https://issues.apache.org/jira/browse/SPARK-24788?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16566402#comment-16566402
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Apache Spark commented on SPARK-24788:
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User 'maropu' has created a pull request for this issue:
https://github.com/apache/spark/pull/21964
> RelationalGroupedDataset.toString throws errors when grouping by
> UnresolvedAttribute
> ------------------------------------------------------------------------------------
>
> Key: SPARK-24788
> URL: https://issues.apache.org/jira/browse/SPARK-24788
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 2.3.1
> Reporter: Chris Horn
> Priority: Minor
>
> This causes references to the RelationalGroupedDataset to break on the shell
> because of the toString call:
> {code:java}
> scala> spark.range(0, 10).groupBy("id")
> res4: org.apache.spark.sql.RelationalGroupedDataset =
> RelationalGroupedDataset: [grouping expressions: [id: bigint], value: [id:
> bigint], type: GroupBy]
> scala> spark.range(0, 10).groupBy('id)
> org.apache.spark.sql.catalyst.analysis.UnresolvedException: Invalid call to
> dataType on unresolved object, tree: 'id
> at
> org.apache.spark.sql.catalyst.analysis.UnresolvedAttribute.dataType(unresolved.scala:105)
> at
> org.apache.spark.sql.RelationalGroupedDataset$$anonfun$12.apply(RelationalGroupedDataset.scala:474)
> at
> org.apache.spark.sql.RelationalGroupedDataset$$anonfun$12.apply(RelationalGroupedDataset.scala:473)
> at
> scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:234)
> at
> scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:234)
> at
> scala.collection.mutable.ResizableArray$class.foreach(ResizableArray.scala:59)
> at scala.collection.mutable.ArrayBuffer.foreach(ArrayBuffer.scala:48)
> at scala.collection.TraversableLike$class.map(TraversableLike.scala:234)
> at scala.collection.AbstractTraversable.map(Traversable.scala:104)
> at
> org.apache.spark.sql.RelationalGroupedDataset.toString(RelationalGroupedDataset.scala:473)
> at
> scala.runtime.ScalaRunTime$.scala$runtime$ScalaRunTime$$inner$1(ScalaRunTime.scala:332)
> at scala.runtime.ScalaRunTime$.stringOf(ScalaRunTime.scala:337)
> at scala.runtime.ScalaRunTime$.replStringOf(ScalaRunTime.scala:345)
> {code}
>
> I will create a PR.
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