mssql.php
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PHP
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<?php
// vim: set et ts=4 sw=4 fdm=marker:
// +----------------------------------------------------------------------+
// | PHP versions 4 and 5 |
// +----------------------------------------------------------------------+
// | Copyright (c) 1998-2008 Manuel Lemos, Tomas V.V.Cox, |
// | Stig. S. Bakken, Lukas Smith, Frank M. Kromann |
// | All rights reserved. |
// +----------------------------------------------------------------------+
// | MDB2 is a merge of PEAR DB and Metabases that provides a unified DB |
// | API as well as database abstraction for PHP applications. |
// | This LICENSE is in the BSD license style. |
// | |
// | Redistribution and use in source and binary forms, with or without |
// | modification, are permitted provided that the following conditions |
// | are met: |
// | |
// | Redistributions of source code must retain the above copyright |
// | notice, this list of conditions and the following disclaimer. |
// | |
// | Redistributions in binary form must reproduce the above copyright |
// | notice, this list of conditions and the following disclaimer in the |
// | documentation and/or other materials provided with the distribution. |
// | |
// | Neither the name of Manuel Lemos, Tomas V.V.Cox, Stig. S. Bakken, |
// | Lukas Smith nor the names of his contributors may be used to endorse |
// | or promote products derived from this software without specific prior|
// | written permission. |
// | |
// | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
// | "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
// | LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
// | FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
// | REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
// | INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
// | BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS|
// | OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
// | AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
// | LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY|
// | WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
// | POSSIBILITY OF SUCH DAMAGE. |
// +----------------------------------------------------------------------+
// | Author: Frank M. Kromann <frank@kromann.info> |
// +----------------------------------------------------------------------+
//
// $Id: mssql.php,v 1.174 2008/03/08 14:18:39 quipo Exp $
//
// {{{ Class MDB2_Driver_mssql
/**
* MDB2 MSSQL Server driver
*
* @package MDB2
* @category Database
* @author Frank M. Kromann <frank@kromann.info>
*/
class MDB2_Driver_mssql extends MDB2_Driver_Common
{
// {{{ properties
var $string_quoting = array('start' => "'", 'end' => "'", 'escape' => "'", 'escape_pattern' => false);
var $identifier_quoting = array('start' => '[', 'end' => ']', 'escape' => ']');
// }}}
// {{{ constructor
/**
* Constructor
*/
function __construct()
{
parent::__construct();
$this->phptype = 'mssql';
$this->dbsyntax = 'mssql';
$this->supported['sequences'] = 'emulated';
$this->supported['indexes'] = true;
$this->supported['affected_rows'] = true;
$this->supported['transactions'] = true;
$this->supported['savepoints'] = false;
$this->supported['summary_functions'] = true;
$this->supported['order_by_text'] = true;
$this->supported['current_id'] = 'emulated';
$this->supported['limit_queries'] = 'emulated';
$this->supported['LOBs'] = true;
$this->supported['replace'] = 'emulated';
$this->supported['sub_selects'] = true;
$this->supported['triggers'] = true;
$this->supported['auto_increment'] = true;
$this->supported['primary_key'] = true;
$this->supported['result_introspection'] = true;
$this->supported['prepared_statements'] = 'emulated';
$this->supported['pattern_escaping'] = true;
$this->supported['new_link'] = true;
$this->options['DBA_username'] = false;
$this->options['DBA_password'] = false;
$this->options['database_device'] = false;
$this->options['database_size'] = false;
$this->options['max_identifiers_length'] = 128; // MS Access: 64
}
// }}}
// {{{ errorInfo()
/**
* This method is used to collect information about an error
*
* @param integer $error
* @return array
* @access public
*/
function errorInfo($error = null, $connection = null)
{
if (is_null($connection)) {
$connection = $this->connection;
}
$native_code = null;
if ($connection) {
$result = @mssql_query('select @@ERROR as ErrorCode', $connection);
if ($result) {
$native_code = @mssql_result($result, 0, 0);
@mssql_free_result($result);
}
}
$native_msg = @mssql_get_last_message();
if (is_null($error)) {
static $ecode_map;
if (empty($ecode_map)) {
$ecode_map = array(
102 => MDB2_ERROR_SYNTAX,
110 => MDB2_ERROR_VALUE_COUNT_ON_ROW,
155 => MDB2_ERROR_NOSUCHFIELD,
156 => MDB2_ERROR_SYNTAX,
170 => MDB2_ERROR_SYNTAX,
207 => MDB2_ERROR_NOSUCHFIELD,
208 => MDB2_ERROR_NOSUCHTABLE,
245 => MDB2_ERROR_INVALID_NUMBER,
319 => MDB2_ERROR_SYNTAX,
321 => MDB2_ERROR_NOSUCHFIELD,
325 => MDB2_ERROR_SYNTAX,
336 => MDB2_ERROR_SYNTAX,
515 => MDB2_ERROR_CONSTRAINT_NOT_NULL,
547 => MDB2_ERROR_CONSTRAINT,
911 => MDB2_ERROR_NOT_FOUND,
1018 => MDB2_ERROR_SYNTAX,
1035 => MDB2_ERROR_SYNTAX,
1801 => MDB2_ERROR_ALREADY_EXISTS,
1913 => MDB2_ERROR_ALREADY_EXISTS,
2209 => MDB2_ERROR_SYNTAX,
2223 => MDB2_ERROR_SYNTAX,
2248 => MDB2_ERROR_SYNTAX,
2256 => MDB2_ERROR_SYNTAX,
2257 => MDB2_ERROR_SYNTAX,
2627 => MDB2_ERROR_CONSTRAINT,
2714 => MDB2_ERROR_ALREADY_EXISTS,
3607 => MDB2_ERROR_DIVZERO,
3701 => MDB2_ERROR_NOSUCHTABLE,
7630 => MDB2_ERROR_SYNTAX,
8134 => MDB2_ERROR_DIVZERO,
9303 => MDB2_ERROR_SYNTAX,
9317 => MDB2_ERROR_SYNTAX,
9318 => MDB2_ERROR_SYNTAX,
9331 => MDB2_ERROR_SYNTAX,
9332 => MDB2_ERROR_SYNTAX,
15253 => MDB2_ERROR_SYNTAX,
);
}
if (isset($ecode_map[$native_code])) {
if ($native_code == 3701
&& preg_match('/Cannot drop the index/i', $native_msg)
) {
$error = MDB2_ERROR_NOT_FOUND;
} else {
$error = $ecode_map[$native_code];
}
}
}
return array($error, $native_code, $native_msg);
}
// }}}
// {{{ function escapePattern($text)
/**
* Quotes pattern (% and _) characters in a string)
*
* @param string the input string to quote
*
* @return string quoted string
*
* @access public
*/
function escapePattern($text)
{
$text = str_replace("[", "[ [ ]", $text);
foreach ($this->wildcards as $wildcard) {
$text = str_replace($wildcard, '[' . $wildcard . ']', $text);
}
return $text;
}
// }}}
// {{{ beginTransaction()
/**
* Start a transaction or set a savepoint.
*
* @param string name of a savepoint to set
* @return mixed MDB2_OK on success, a MDB2 error on failure
*
* @access public
*/
function beginTransaction($savepoint = null)
{
$this->debug('Starting transaction/savepoint', __FUNCTION__, array('is_manip' => true, 'savepoint' => $savepoint));
if (!is_null($savepoint)) {
if (!$this->in_transaction) {
return $this->raiseError(MDB2_ERROR_INVALID, null, null,
'savepoint cannot be released when changes are auto committed', __FUNCTION__);
}
$query = 'SAVE TRANSACTION '.$savepoint;
return $this->_doQuery($query, true);
} elseif ($this->in_transaction) {
return MDB2_OK; //nothing to do
}
if (!$this->destructor_registered && $this->opened_persistent) {
$this->destructor_registered = true;
register_shutdown_function('MDB2_closeOpenTransactions');
}
$result =& $this->_doQuery('BEGIN TRANSACTION', true);
if (PEAR::isError($result)) {
return $result;
}
$this->in_transaction = true;
return MDB2_OK;
}
// }}}
// {{{ commit()
/**
* Commit the database changes done during a transaction that is in
* progress or release a savepoint. This function may only be called when
* auto-committing is disabled, otherwise it will fail. Therefore, a new
* transaction is implicitly started after committing the pending changes.
*
* @param string name of a savepoint to release
* @return mixed MDB2_OK on success, a MDB2 error on failure
*
* @access public
*/
function commit($savepoint = null)
{
$this->debug('Committing transaction/savepoint', __FUNCTION__, array('is_manip' => true, 'savepoint' => $savepoint));
if (!$this->in_transaction) {
return $this->raiseError(MDB2_ERROR_INVALID, null, null,
'commit/release savepoint cannot be done changes are auto committed', __FUNCTION__);
}
if (!is_null($savepoint)) {
return MDB2_OK;
}
$result =& $this->_doQuery('COMMIT TRANSACTION', true);
if (PEAR::isError($result)) {
return $result;
}
$this->in_transaction = false;
return MDB2_OK;
}
// }}}
// {{{ rollback()
/**
* Cancel any database changes done during a transaction or since a specific
* savepoint that is in progress. This function may only be called when
* auto-committing is disabled, otherwise it will fail. Therefore, a new
* transaction is implicitly started after canceling the pending changes.
*
* @param string name of a savepoint to rollback to
* @return mixed MDB2_OK on success, a MDB2 error on failure
*
* @access public
*/
function rollback($savepoint = null)
{
$this->debug('Rolling back transaction/savepoint', __FUNCTION__, array('is_manip' => true, 'savepoint' => $savepoint));
if (!$this->in_transaction) {
return $this->raiseError(MDB2_ERROR_INVALID, null, null,
'rollback cannot be done changes are auto committed', __FUNCTION__);
}
if (!is_null($savepoint)) {
$query = 'ROLLBACK TRANSACTION '.$savepoint;
return $this->_doQuery($query, true);
}
$result =& $this->_doQuery('ROLLBACK TRANSACTION', true);
if (PEAR::isError($result)) {
return $result;
}
$this->in_transaction = false;
return MDB2_OK;
}
// }}}
// {{{ _doConnect()
/**
* do the grunt work of the connect
*
* @return connection on success or MDB2 Error Object on failure
* @access protected
*/
function _doConnect($username, $password, $persistent = false)
{
if (!PEAR::loadExtension($this->phptype) && !PEAR::loadExtension('sybase_ct')) {
return $this->raiseError(MDB2_ERROR_NOT_FOUND, null, null,
'extension '.$this->phptype.' is not compiled into PHP', __FUNCTION__);
}
$params = array(
$this->dsn['hostspec'] ? $this->dsn['hostspec'] : 'localhost',
$username ? $username : null,
$password ? $password : null,
);
if ($this->dsn['port']) {
$params[0].= ((substr(PHP_OS, 0, 3) == 'WIN') ? ',' : ':').$this->dsn['port'];
}
if (!$persistent) {
if (isset($this->dsn['new_link'])
&& ($this->dsn['new_link'] == 'true' || $this->dsn['new_link'] === true)
) {
$params[] = true;
} else {
$params[] = false;
}
}
$connect_function = $persistent ? 'mssql_pconnect' : 'mssql_connect';
$connection = @call_user_func_array($connect_function, $params);
if ($connection <= 0) {
return $this->raiseError(MDB2_ERROR_CONNECT_FAILED, null, null,
'unable to establish a connection', __FUNCTION__, __FUNCTION__);
}
@mssql_query('SET ANSI_NULL_DFLT_ON ON', $connection);
if (!empty($this->dsn['charset'])) {
$result = $this->setCharset($this->dsn['charset'], $connection);
if (PEAR::isError($result)) {
return $result;
}
}
if ((bool)ini_get('mssql.datetimeconvert')) {
@ini_set('mssql.datetimeconvert', '0');
}
if (empty($this->dsn['disable_iso_date'])) {
@mssql_query('SET DATEFORMAT ymd', $connection);
}
return $connection;
}
// }}}
// {{{ connect()
/**
* Connect to the database
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