anchor.diff:  === Considerations for AUTHNAME
   
   * This function can be specified only in the top level of a SELECT statement.
  -* The value returned is string data type VARCHAR(128) and is in ISO8859-1 encoding.
  +* The value returned is string data type VARCHAR(128) and is in ISO88591 encoding.
   
   [[examples_of_authname]]
   === Examples of AUTHNAME
  
positive.code: +
  specifies the number of characters to be returned. The number _count_
  must be a value greater than or equal to zero of exact numeric data type
  and with a scale of zero. _length_ cannot exceed 32768 for the ISO8859-1
  or UTF8 character sets.
  
  * `_char-set-name_`
  
negative.code: === Considerations for USER
  
  * This function can be specified only in the top level of a SELECT statement.
  * The value returned is string data type VARCHAR(128) and is in ISO88591 encoding.
  
  [[examples_of_user]]
  === Examples of USER
  