SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 1)
    Function reverse (children 1)
     ExpressionList (children 1)
      Function toFixedString (children 1)
       ExpressionList (children 2)
        Function toString (children 1)
         ExpressionList (children 1)
          Function round (children 1)
           ExpressionList (children 1)
            Function exp10 (children 1)
             ExpressionList (children 1)
              Identifier number
        Literal UInt64_10
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier system.numbers
   Literal UInt64_10