<str> not supported for character set <str> - ignored

  Explanation:  The predicate LIKE ...  IGNORE CASE, and functions
  UPPER and LOWER require character sets that include upper and
  lower case characters.  This character does not support this
  functionality.

  User Action:  This is a warning and the function or clause will
  be discarded by SQL.  This character set does not require IGNORE
  CASE, UPPER or LOWER functions.  They can be removed from the
  query.