SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function isValidUTF8 (children 1)
     ExpressionList (children 1)
      Function randomStringUTF8 (children 1)
       ExpressionList (children 1)
        Literal UInt64_100000