SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 1)
    Function ignore (children 1)
     ExpressionList (children 1)
      Function finalizeAggregation (children 1)
       ExpressionList (children 1)
        Identifier Users
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Subquery (children 1)
       SelectWithUnionQuery (children 1)
        ExpressionList (children 1)
         SelectQuery (children 4)
          ExpressionList (children 3)
           Identifier FlightDate
           Identifier Carrier
           Function uniqState (alias Users) (children 1)
            ExpressionList (children 1)
             Identifier FlightNum
          TablesInSelectQuery (children 1)
           TablesInSelectQueryElement (children 1)
            TableExpression (children 1)
             TableIdentifier ontime
          ExpressionList (children 2)
           Identifier FlightDate
           Identifier Carrier
          Literal UInt64_1
