public CaseFragment createCaseFragment() 
{
		// Oracle did add support for ANSI CASE statements in 9i
		return new ANSICaseFragment();
}

 public String getCurrentTimestampSQLFunctionName() 
{
		// the standard SQL function name is current_timestamp...
		return "current_timestamp";
}

 public String getCurrentTimestampSelectString() 
{
		return "select systimestamp from dual";
}

 public String getLimitString(String sql,
    boolean hasOffset) 
{
		sql = sql.trim();
		boolean isForUpdate = false;
		if ( sql.toLowerCase().endsWith(" for update") ) {
			sql = sql.substring( 0, sql.length()-11 );
			isForUpdate = true;
		}
		StringBuffer pagingSelect = new StringBuffer( sql.length()+100 );
		if (hasOffset) {
			pagingSelect.append("select * from ( select row_.*, rownum rownum_ from ( ");
		}
		else {
			pagingSelect.append("select * from ( ");
		}
		pagingSelect.append(sql);
		if (hasOffset) {
			pagingSelect.append(" ) row_ where rownum < = ?) where rownum_  > ?");
		}
		else {
			pagingSelect.append(" ) where rownum < = ?");
		}
		if ( isForUpdate ) {
			pagingSelect.append( " for update" );
		}
		return pagingSelect.toString();
}

 public String getSelectClauseNullString(int sqlType) 
{
		return getBasicSelectClauseNullString( sqlType );
}

 protected  void registerCharacterTypeMappings() 
{
		registerColumnType( Types.CHAR, "char(1 char)" );
		registerColumnType( Types.VARCHAR, 4000, "varchar2($l char)" );
		registerColumnType( Types.VARCHAR, "long" );
}

 protected  void registerDateTimeTypeMappings() 
{
		registerColumnType( Types.DATE, "date" );
		registerColumnType( Types.TIME, "date" );
		registerColumnType( Types.TIMESTAMP, "timestamp" );
}