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https://issues.apache.org/jira/browse/SPARK-3371?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14145258#comment-14145258
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Ravindra Pesala commented on SPARK-3371:
----------------------------------------
https://github.com/apache/spark/pull/2511
> Spark SQL: Renaming a function expression with group by gives error
> -------------------------------------------------------------------
>
> Key: SPARK-3371
> URL: https://issues.apache.org/jira/browse/SPARK-3371
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 1.1.0
> Reporter: Pei-Lun Lee
>
> {code}
> val sqlContext = new org.apache.spark.sql.SQLContext(sc)
> val rdd = sc.parallelize(List("""{"foo":"bar"}"""))
> sqlContext.jsonRDD(rdd).registerAsTable("t1")
> sqlContext.registerFunction("len", (s: String) => s.length)
> sqlContext.sql("select len(foo) as a, count(1) from t1 group by
> len(foo)").collect()
> {code}
> running above code in spark-shell gives the following error
> {noformat}
> 14/09/03 17:20:13 ERROR Executor: Exception in task 2.0 in stage 3.0 (TID 214)
> org.apache.spark.sql.catalyst.errors.package$TreeNodeException: Binding
> attribute, tree: foo#0
> at
> org.apache.spark.sql.catalyst.errors.package$.attachTree(package.scala:47)
> at
> org.apache.spark.sql.catalyst.expressions.BindReferences$$anonfun$bindReference$1.applyOrElse(BoundAttribute.scala:43)
> at
> org.apache.spark.sql.catalyst.expressions.BindReferences$$anonfun$bindReference$1.applyOrElse(BoundAttribute.scala:42)
> at
> org.apache.spark.sql.catalyst.trees.TreeNode.transformDown(TreeNode.scala:165)
> at
> org.apache.spark.sql.catalyst.trees.TreeNode$$anonfun$4$$anonfun$apply$2.apply(TreeNode.scala:201)
> 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.trees.TreeNode$$anonfun$4.apply(TreeNode.scala:199)
> at scala.collection.Iterator$$anon$11.next(Iterator.scala:328)
> at scala.collection.Iterator$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.catalyst.trees.TreeNode.transformChildrenDown(TreeNode.scala:212)
> at
> org.apache.spark.sql.catalyst.trees.TreeNode.transformDown(TreeNode.scala:168)
> at
> org.apache.spark.sql.catalyst.trees.TreeNode$$anonfun$4.apply(TreeNode.scala:183)
> at scala.collection.Iterator$$anon$11.next(Iterator.scala:328)
> {noformat}
> remove "as a" in the query causes no error
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