SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 1)
    Function equals (children 1)
     ExpressionList (children 2)
      Literal UInt64_1
      Function isValidUTF8 (children 1)
       ExpressionList (children 1)
        Function toValidUTF8 (children 1)
         ExpressionList (children 1)
          Literal \'안녕하세요, 세상\'
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier system.numbers
   Literal UInt64_10