<str> is a SQL reserved keyword:  its use as an identifier is
  non-standard

  Explanation:  According to SQL89 and SQL92, no nondelimited
  (unquoted) identifier can be a SQL reserved keyword.  If a SQL
  keyword must be used, it must be delimited by double quotes.
  This bypasses keyword checking in the scanner.

  User Action:  If it is important to have only standard features
  in your program, change the identifier so that it is not a SQL
  keyword.  If the identifier must be the same as a SQL keyword,
  delimit it with double quotes (e.g.  DOUBLE becomes "DOUBLE")