Something

class DB_mysql extends DB_common
{

    // {{{ properties

    var $connection;
    var $phptype, $dbsyntax;
    var $prepare_tokens = array();
    var $prepare_types = array();
    var $num_rows = array();
    var $transaction_opcount = 0;
    var $autocommit = true;
    var $fetchmode = DB_FETCHMODE_ORDERED; /* Default fetch mode */
    var $_db = false;

    // }}}
    // {{{ constructor
    /**
     * DB_mysql constructor.
     *
     * @access public
     */

    function DB_mysql()
    {
        $this->DB_common();
        $this->phptype = 'mysql';
        $this->dbsyntax = 'mysql';
        $this->features = array(
            'prepare' => false,
            'pconnect' => true,
            'transactions' => true,
            'limit' => 'alter'
        );
        $this->errorcode_map = array(
            1004 => DB_ERROR_CANNOT_CREATE,
            1005 => DB_ERROR_CANNOT_CREATE,
            1006 => DB_ERROR_CANNOT_CREATE,
            1007 => DB_ERROR_ALREADY_EXISTS,
            1008 => DB_ERROR_CANNOT_DROP,
            1022 => DB_ERROR_ALREADY_EXISTS,
            1046 => DB_ERROR_NODBSELECTED,
            1048 => DB_ERROR_CONSTRAINT,
            1050 => DB_ERROR_ALREADY_EXISTS,
            1051 => DB_ERROR_NOSUCHTABLE,
            1054 => DB_ERROR_NOSUCHFIELD,
            1062 => DB_ERROR_ALREADY_EXISTS,
            1064 => DB_ERROR_SYNTAX,
            1100 => DB_ERROR_NOT_LOCKED,
            1136 => DB_ERROR_VALUE_COUNT_ON_ROW,
            1146 => DB_ERROR_NOSUCHTABLE,
            1216 => DB_ERROR_CONSTRAINT,
            1217 => DB_ERROR_CONSTRAINT,
        );
    }