[GitHub] spark pull request #17100: [SPARK-13947][SQL] PySpark DataFrames: The error ...

[rberenguel <gi...@git.apache.org>]

Github user rberenguel commented on a diff in the pull request:

    https://github.com/apache/spark/pull/17100#discussion_r107354055
  
    --- Diff: sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/CheckAnalysis.scala ---
    @@ -337,11 +337,29 @@ trait CheckAnalysis extends PredicateHelper {
             operator match {
               case o if o.children.nonEmpty && o.missingInput.nonEmpty =>
                 val missingAttributes = o.missingInput.mkString(",")
    -            val input = o.inputSet.mkString(",")
    +            val availableAttributes = o.inputSet.mkString(",")
    +            val missingAttributesHelper = o.missingInput.map(a => (a.name, a.exprId.id))
    +
    +            val availableAttributesHelper = o.inputSet.map(a => (a.name, a.exprId.id))
    +
    +            val common = (missingAttributesHelper ++ availableAttributesHelper).groupBy(_._1)
    +            val commonNames = common.map(x => (x._1, x._2.toSet))
    +              .filter(_._2.size > 1)
    +              .map(_._1)
    +
    +            val repeatedNameHint = if (commonNames.size > 0) {
    +              s"\n|Observe that attribute(s) ${commonNames.mkString(",")} appear in your " +
    +                "query with at least two different hashes, but same name."
    --- End diff --
    
    Good point!


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