| | |
| | | | | |
| | | | This file is part of the Roundcube Webmail client | |
| | | | Copyright (C) 2005-2009, The Roundcube Dev Team | |
| | | | Licensed under the GNU GPL | |
| | | | | |
| | | | Licensed under the GNU General Public License version 3 or | |
| | | | any later version with exceptions for skins & plugins. | |
| | | | See the README file for a full license statement. | |
| | | | | |
| | | | PURPOSE: | |
| | | | PEAR:DB wrapper class that implements PEAR MDB2 functions | |
| | |
| | | */ |
| | | 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); |
| | | |
| | | // 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; |
| | | $this->db_mode = $mode; |
| | | else |
| | | $this->conn_failure = true; |
| | | } |
| | | |
| | | |
| | |
| | | function is_connected() |
| | | { |
| | | return PEAR::isError($this->db_handle) ? false : $this->db_connected; |
| | | } |
| | | |
| | | |
| | | /** |
| | | * Is database replication configured? |
| | | * This returns true if dsnw != dsnr |
| | | */ |
| | | function is_replicated() |
| | | { |
| | | return !empty($this->db_dsnr) && $this->db_dsnw != $this->db_dsnr; |
| | | } |
| | | |
| | | |
| | |
| | | raise_error(array('code' => 500, 'type' => 'db', |
| | | 'line' => __LINE__, 'file' => __FILE__, |
| | | 'message' => $this->db_error_msg), true, false); |
| | | |
| | | |
| | | $result = false; |
| | | } |
| | | else { |
| | |
| | | if (!PEAR::isError($result = $this->db_handle->listTableFields($table))) { |
| | | return $result; |
| | | } |
| | | |
| | | |
| | | return null; |
| | | } |
| | | |
| | |
| | | */ |
| | | function now() |
| | | { |
| | | switch($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) |
| | | { |
| | |
| | | default: |
| | | return $this->quote_identifier($column).' LIKE '.$this->quote($value); |
| | | } |
| | | } |
| | | |
| | | /** |
| | | * Abstract SQL statement for value concatenation |
| | | * |
| | | * @return string SQL statement to be used in query |
| | | * @access public |
| | | */ |
| | | function concat(/* col1, col2, ... */) |
| | | { |
| | | $func = ''; |
| | | $args = func_get_args(); |
| | | if (is_array($args[0])) |
| | | $args = $args[0]; |
| | | |
| | | switch($this->db_provider) { |
| | | case 'mysql': |
| | | case 'mysqli': |
| | | $func = 'CONCAT'; |
| | | $delim = ', '; |
| | | break; |
| | | case 'mssql': |
| | | case 'sqlsrv': |
| | | $delim = ' + '; |
| | | break; |
| | | default: |
| | | $delim = ' || '; |
| | | } |
| | | |
| | | return $func . '(' . join($delim, $args) . ')'; |
| | | } |
| | | |
| | | |
| | |
| | | 'md5', 'rcube_sqlite_md5'); |
| | | } |
| | | |
| | | } // end class rcube_db |
| | | |
| | | |
| | | /* this is our own debug handler for the MDB2 connection */ |
| | | function mdb2_debug_handler(&$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 |