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https://issues.apache.org/jira/browse/SPARK-17872?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Hyukjin Kwon resolved SPARK-17872.
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Resolution: Incomplete
> aggregate function on dataset with tuples grouped by non sequential fields
> --------------------------------------------------------------------------
>
> Key: SPARK-17872
> URL: https://issues.apache.org/jira/browse/SPARK-17872
> Project: Spark
> Issue Type: Bug
> Components: Spark Core
> Affects Versions: 2.0.1
> Reporter: Niek Bartholomeus
> Priority: Major
> Labels: bulk-closed
>
> The following lines where the field index in the tuple used in an aggregate
> function is lower than a field index used in the group by clause fails:
> {code}
> val testDS = Seq((1, 1, 1, 1)).toDS
> // group by field 1 and 3, aggregate on field 2 and 4:
> testDS
> .groupByKey { case (level1, level1FigureA, level2, level2FigureB) =>
> (level1, level2) }
> .agg((sum($"_2" * $"_4")).as[Double])
> .collect
> {code}
> Error message:
> {code}
> org.apache.spark.sql.AnalysisException: Reference '_2' is ambiguous, could
> be: _2#562, _2#569.;
> at
> org.apache.spark.sql.catalyst.plans.logical.LogicalPlan.resolve(LogicalPlan.scala:264)
> at
> org.apache.spark.sql.catalyst.plans.logical.LogicalPlan.resolveChildren(LogicalPlan.scala:148)
> at
> org.apache.spark.sql.catalyst.analysis.Analyzer$ResolveReferences$$anonfun$apply$9$$anonfun$applyOrElse$5$$anonfun$31.apply(Analyzer.scala:604)
> at
> org.apache.spark.sql.catalyst.analysis.Analyzer$ResolveReferences$$anonfun$apply$9$$anonfun$applyOrElse$5$$anonfun$31.apply(Analyzer.scala:604)
> at
> org.apache.spark.sql.catalyst.analysis.package$.withPosition(package.scala:48)
> at
> org.apache.spark.sql.catalyst.analysis.Analyzer$ResolveReferences$$anonfun$apply$9$$anonfun$applyOrElse$5.applyOrElse(Analyzer.scala:604)
> at
> org.apache.spark.sql.catalyst.analysis.Analyzer$ResolveReferences$$anonfun$apply$9$$anonfun$applyOrElse$5.applyOrElse(Analyzer.scala:600)
> at
> org.apache.spark.sql.catalyst.trees.TreeNode$$anonfun$transformUp$1.apply(TreeNode.scala:301)
> at
> org.apache.spark.sql.catalyst.trees.TreeNode$$anonfun$transformUp$1.apply(TreeNode.scala:301)
> at
> org.apache.spark.sql.catalyst.trees.CurrentOrigin$.withOrigin(TreeNode.scala:69)
> {code}
> While the following code - where the aggregate field indices are all higher
> than the groupby field indices - works fine:
> {code}
> testDS
> .map { case (level1, level1FigureA, level2, level2FigureB) => (level1,
> level2, level1FigureA, level2FigureB) }
> .groupByKey { case (level1, level2, level1FigureA, level2FigureB) =>
> (level1, level2) }
> .agg((sum($"_3" * $"_4")).as[Double])
> .collect
> {code}
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