SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function length (children 1)
     ExpressionList (children 1)
      Function repeat (children 1)
       ExpressionList (children 2)
        Function repeat (children 1)
         ExpressionList (children 2)
          Literal \'Hello, world!\'
          Literal UInt64_1000000
        Literal UInt64_10
