| program/include/rcube_mdb2.php |
| |
| This file is part of the Roundcube Webmail client |
- | Copyright (C) 2005-2009, Roundcube Dev. - Switzerland |
+ | Copyright (C) 2005-2009, The Roundcube Dev Team |
| Licensed under the GNU GPL |
| |
| PURPOSE: |
| Author: Lukas Kahwe Smith <smith@pooteeweet.org> |
+-----------------------------------------------------------------------+
- $Id: rcube_mdb2.php 4057 2010-10-07 07:03:25Z alec $
+ $Id: rcube_mdb2.php 5543 2011-12-05 07:24:36Z alec $
*/
* @author David Saez Padros <david@ols.es>
* @author Thomas Bruederli <roundcube@gmail.com>
* @author Lukas Kahwe Smith <smith@pooteeweet.org>
- * @version 1.17
+ * @version 1.18
* @link http://pear.php.net/package/MDB2
*/
class rcube_mdb2
{
- var $db_dsnw; // DSN for write operations
- var $db_dsnr; // DSN for read operations
- var $db_connected = false; // Already connected ?
- var $db_mode = ''; // Connection mode
- var $db_handle = 0; // Connection handle
- var $db_error = false;
- var $db_error_msg = '';
+ public $db_dsnw; // DSN for write operations
+ public $db_dsnr; // DSN for read operations
+ public $db_connected = false; // Already connected ?
+ public $db_mode = ''; // Connection mode
+ public $db_handle = 0; // Connection handle
+ public $db_error = false;
+ public $db_error_msg = '';
private $debug_mode = false;
+ private $conn_failure = false;
private $a_query_results = array('dummy');
private $last_res_id = 0;
private $tables;
*/
function __construct($db_dsnw, $db_dsnr='', $pconn=false)
{
- if ($db_dsnr == '')
+ if (empty($db_dsnr))
$db_dsnr = $db_dsnw;
$this->db_dsnw = $db_dsnw;
'persistent' => $this->db_pconn,
'emulate_prepared' => $this->debug_mode,
'debug' => $this->debug_mode,
- 'debug_handler' => 'mdb2_debug_handler',
+ 'debug_handler' => array($this, 'debug_handler'),
'portability' => MDB2_PORTABILITY_ALL ^ MDB2_PORTABILITY_EMPTY_TO_NULL);
if ($this->db_provider == 'pgsql') {
$db_options['disable_smart_seqname'] = true;
$db_options['seqname_format'] = '%s';
}
+ $this->db_error = false;
+ $this->db_error_msg = null;
$dbh = MDB2::connect($dsn, $db_options);
*/
function db_connect($mode)
{
+ // previous connection failed, don't attempt to connect again
+ if ($this->conn_failure) {
+ return;
+ }
+
+ // no replication
+ if ($this->db_dsnw == $this->db_dsnr) {
+ $mode = 'w';
+ }
+
// Already connected
if ($this->db_connected) {
- // connected to read-write db, current connection is ok
- if ($this->db_mode == 'w')
- return;
-
- // no replication, current connection is ok for read and write
- if (empty($this->db_dsnr) || $this->db_dsnw == $this->db_dsnr) {
- $this->db_mode = 'w';
+ // connected to db with the same or "higher" mode
+ if ($this->db_mode == 'w' || $this->db_mode == $mode) {
return;
}
-
- // Same mode, current connection is ok
- if ($this->db_mode == $mode)
- return;
}
$dsn = ($mode == 'r') ? $this->db_dsnr : $this->db_dsnw;
- $this->db_handle = $this->dsn_connect($dsn);
+ $this->db_handle = $this->dsn_connect($dsn);
$this->db_connected = !PEAR::isError($this->db_handle);
- $this->db_mode = $mode;
+
+ // use write-master when read-only fails
+ if (!$this->db_connected && $mode == 'r') {
+ $mode = 'w';
+ $this->db_handle = $this->dsn_connect($this->db_dsnw);
+ $this->db_connected = !PEAR::isError($this->db_handle);
+ }
+
+ if ($this->db_connected)
+ $this->db_mode = $mode;
+ else
+ $this->conn_failure = true;
}
}
+ /**
+ * Is database replication configured?
+ * This returns true if dsnw != dsnr
+ */
+ function is_replicated()
+ {
+ return !empty($this->db_dsnr) && $this->db_dsnw != $this->db_dsnr;
+ }
+
+
/**
* Execute a SQL query
*
raise_error(array('code' => 500, 'type' => 'db',
'line' => __LINE__, 'file' => __FILE__,
- 'message' => $this->db_error_msg), true, true);
+ 'message' => $this->db_error_msg), true, false);
+
+ $result = false;
}
else {
$result = $q->execute($params);
*/
function num_rows($res_id=null)
{
- if (!$this->db_handle)
+ if (!$this->db_connected)
return false;
if ($result = $this->_get_result($res_id))
*/
function affected_rows($res_id = null)
{
- if (!$this->db_handle)
+ if (!$this->db_connected)
return false;
- return (int) $this->_get_result($res_id);
+ return $this->_get_result($res_id);
}
*/
function insert_id($table = '')
{
- if (!$this->db_handle || $this->db_mode == 'r')
+ if (!$this->db_connected || $this->db_mode == 'r')
return false;
if ($table) {
}
+ /**
+ * Wrapper for SHOW COLUMNS command
+ *
+ * @param string Table name
+ * @return array List of table cols
+ */
+ function list_cols($table)
+ {
+ $this->db_handle->loadModule('Manager');
+ if (!PEAR::isError($result = $this->db_handle->listTableFields($table))) {
+ return $result;
+ }
+
+ return null;
+ }
+
+
/**
* Formats input so it can be safely used in a query
*
if (!$this->db_handle)
$this->db_connect('r');
- return $this->db_handle->quote($input, $type);
+ return $this->db_connected ? $this->db_handle->quote($input, $type) : addslashes($input);
}
if (!$this->db_handle)
$this->db_connect('r');
- return $this->db_handle->quoteIdentifier($str);
+ return $this->db_connected ? $this->db_handle->quoteIdentifier($str) : $str;
}
*/
function now()
{
- switch($this->db_provider) {
+ switch ($this->db_provider) {
case 'mssql':
case 'sqlsrv':
return "getdate()";
/**
* Return SQL statement to convert a field value into a unix timestamp
*
+ * This method is deprecated and should not be used anymore due to limitations
+ * of timestamp functions in Mysql (year 2038 problem)
+ *
* @param string $field Field name
* @return string SQL statement to use in query
- * @access public
+ * @deprecated
*/
function unixtimestamp($field)
{
*/
function fromunixtime($timestamp)
{
- switch($this->db_provider) {
- case 'mysqli':
- case 'mysql':
- case 'sqlite':
- return sprintf("FROM_UNIXTIME(%d)", $timestamp);
-
- default:
- return date("'Y-m-d H:i:s'", $timestamp);
- }
+ return date("'Y-m-d H:i:s'", $timestamp);
}
}
}
+ /**
+ * Abstract SQL statement for value concatenation
+ *
+ * @return string SQL statement to be used in query
+ * @access public
+ */
+ function concat(/* col1, col2, ... */)
+ {
+ $func = '';
+ $args = func_get_args();
+
+ switch($this->db_provider) {
+ case 'mysql':
+ case 'mysqli':
+ $func = 'CONCAT';
+ $delim = ', ';
+ break;
+ case 'mssql':
+ case 'sqlsrv':
+ $delim = ' + ';
+ break;
+ default:
+ $delim = ' || ';
+ }
+
+ return $func . '(' . join($delim, $args) . ')';
+ }
+
/**
* Encodes non-UTF-8 characters in string/array/object (recursive)
*/
private function _sqlite_prepare()
{
- include_once('include/rcube_sqlite.inc');
+ include_once(INSTALL_PATH . 'program/include/rcube_sqlite.inc');
// we emulate via callback some missing MySQL function
sqlite_create_function($this->db_handle->connection,
'md5', 'rcube_sqlite_md5');
}
-} // end class rcube_db
-
-/* this is our own debug handler for the MDB2 connection */
-function mdb2_debug_handler(&$db, $scope, $message, $context = array())
-{
- if ($scope != 'prepare') {
- $debug_output = sprintf('%s(%d): %s;',
- $scope, $db->db_index, rtrim($message, ';'));
- write_log('sql', $debug_output);
+ /**
+ * Debug handler for the MDB2
+ */
+ function debug_handler(&$db, $scope, $message, $context = array())
+ {
+ if ($scope != 'prepare') {
+ $debug_output = sprintf('%s(%d): %s;',
+ $scope, $db->db_index, rtrim($message, ';'));
+ write_log('sql', $debug_output);
+ }
}
-}
+} // end class rcube_db
projects / roundcube.git / blobdiff