SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 1)
    Function count (children 1)
     ExpressionList
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Subquery (children 1)
       SelectWithUnionQuery (children 1)
        ExpressionList (children 1)
         SelectQuery (children 1)
          ExpressionList (children 2)
           Function sum (children 1)
            ExpressionList (children 1)
             Function materialize (children 1)
              ExpressionList (children 1)
               Literal UInt64_1
           Function sum (children 1)
            ExpressionList (children 1)
             Function materialize (children 1)
              ExpressionList (children 1)
               Literal UInt64_2