SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function initializeAggregation (children 1)
     ExpressionList (children 2)
      Literal \'uniqStateForEachMapForEach\'
      Function array (children 1)
       ExpressionList (children 1)
        Function map (children 1)
         ExpressionList (children 2)
          Literal UInt64_1
          Literal Array_[UInt64_2]
