Github user cloud-fan commented on a diff in the pull request:

    https://github.com/apache/spark/pull/10678#discussion_r51357541
  
    --- Diff: 
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Analyzer.scala
 ---
    @@ -521,38 +522,99 @@ class Analyzer(
        */
       object ResolveSortReferences extends Rule[LogicalPlan] {
         def apply(plan: LogicalPlan): LogicalPlan = plan resolveOperators {
    -      case s @ Sort(ordering, global, p @ Project(projectList, child))
    -          if !s.resolved && p.resolved =>
    -        val (newOrdering, missing) = resolveAndFindMissing(ordering, p, 
child)
    +      case s @ Sort(_, _, a: Aggregate) if a.resolved =>
    --- End diff --
    
    can we put the problematic query in an ignored test? just in case we don't 
forget it...


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