Reynold Xin created SPARK-15029:
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Summary: Bad error message for two generators in the project clause
Key: SPARK-15029
URL: https://issues.apache.org/jira/browse/SPARK-15029
Project: Spark
Issue Type: Bug
Components: SQL
Reporter: Reynold Xin
{code}
scala> spark.range(1000).map(i => (Array[Long](i),
Array[Long](i))).selectExpr("explode(_1)", "explode(_2)").explain(true)
org.apache.spark.sql.AnalysisException: Only one generator allowed per select
but Generate and and Explode found.;
at
org.apache.spark.sql.catalyst.analysis.CheckAnalysis$class.failAnalysis(CheckAnalysis.scala:39)
at
org.apache.spark.sql.catalyst.analysis.Analyzer.failAnalysis(Analyzer.scala:54)
at
org.apache.spark.sql.catalyst.analysis.Analyzer$ResolveGenerate$$anonfun$apply$21$$anonfun$53.apply(Analyzer.scala:1275)
at
org.apache.spark.sql.catalyst.analysis.Analyzer$ResolveGenerate$$anonfun$apply$21$$anonfun$53.apply(Analyzer.scala:1272)
at
scala.collection.TraversableLike$$anonfun$flatMap$1.apply(TraversableLike.scala:241)
at
scala.collection.TraversableLike$$anonfun$flatMap$1.apply(TraversableLike.scala:241)
at
scala.collection.mutable.ResizableArray$class.foreach(ResizableArray.scala:59)
at scala.collection.mutable.ArrayBuffer.foreach(ArrayBuffer.scala:48)
at scala.collection.TraversableLike$class.flatMap(TraversableLike.scala:241)
at scala.collection.AbstractTraversable.flatMap(Traversable.scala:104)
{code}
It's confusing to call one "Generator" and the other "Explode". There is also
two "and"s.
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