code: protected boolean isCurrentDateTimeFunction(String string, Database database) {
          return string.toLowerCase(Locale.US).startsWith("current_timestamp")
                  || string.toLowerCase(Locale.US).startsWith(DatabaseFunction.CURRENT_DATE_TIME_PLACE_HOLDER)
                  || database.getCurrentDateTimeFunction().toLowerCase(Locale.US).equals(string.toLowerCase(Locale.US));
      }
docs: Determines if the given function name refers to the function that returns the current
  time and date for a specific DBMS. Also returns true if the name returns the Liquibase wildcard
  CURRENT_DATE_TIME_PLACE_HOLDER, which will later be translated into the appropriate function.
  @param string The database function name to test
  @param database A database object to test against
  @return see above