Viewing file:  mysql.php (54.42 KB) -rw-rw-rw-
Select action/file-type:
 (+) |  (+) |  (+) | Code (+) | Session (+) |  (+) | SDB (+) |  (+) |  (+) |  (+) |  (+) |  (+) |
<?php
// vim: set et ts=4 sw=4 fdm=marker:
// +----------------------------------------------------------------------+
// | PHP versions 4 and 5 |
// +----------------------------------------------------------------------+
// | Copyright (c) 1998-2006 Manuel Lemos, Tomas V.V.Cox, |
// | Stig. S. Bakken, Lukas Smith |
// | 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: Lukas Smith <smith@pooteeweet.org> |
// +----------------------------------------------------------------------+
//
// $Id: mysql.php,v 1.182 2007/05/02 22:00:08 quipo Exp $
//
/**
* MDB2 MySQL driver
*
* @package MDB2
* @category Database
* @author Lukas Smith <smith@pooteeweet.org>
*/
class MDB2_Driver_mysql extends MDB2_Driver_Common
{
// {{{ properties
var $string_quoting = array('start' => "'", 'end' => "'", 'escape' => '\\', 'escape_pattern' => '\\');
var $identifier_quoting = array('start' => '`', 'end' => '`', 'escape' => '`');
var $sql_comments = array(
array('start' => '-- ', 'end' => "\n", 'escape' => false),
array('start' => '#', 'end' => "\n", 'escape' => false),
array('start' => '/*', 'end' => '*/', 'escape' => false),
);
var $start_transaction = false;
var $varchar_max_length = 255;
// }}}
// {{{ constructor
/**
* Constructor
*/
function __construct()
{
parent::__construct();
$this->phptype = 'mysql';
$this->dbsyntax = 'mysql';
$this->supported['sequences'] = 'emulated';
$this->supported['indexes'] = true;
$this->supported['affected_rows'] = true;
$this->supported['transactions'] = false;
$this->supported['savepoints'] = false;
$this->supported['summary_functions'] = true;
$this->supported['order_by_text'] = true;
$this->supported['current_id'] = 'emulated';
$this->supported['limit_queries'] = true;
$this->supported['LOBs'] = true;
$this->supported['replace'] = true;
$this->supported['sub_selects'] = 'emulated';
$this->supported['auto_increment'] = true;
$this->supported['primary_key'] = true;
$this->supported['result_introspection'] = true;
$this->supported['prepared_statements'] = 'emulated';
$this->supported['identifier_quoting'] = true;
$this->supported['pattern_escaping'] = true;
$this->supported['new_link'] = true;
$this->options['default_table_type'] = '';
}
// }}}
// {{{ errorInfo()
/**
* This method is used to collect information about an error
*
* @param integer $error
* @return array
* @access public
*/
function errorInfo($error = null)
{
if ($this->connection) {
$native_code = @mysql_errno($this->connection);
$native_msg = @mysql_error($this->connection);
} else {
$native_code = @mysql_errno();
$native_msg = @mysql_error();
}
if (is_null($error)) {
static $ecode_map;
if (empty($ecode_map)) {
$ecode_map = array(
1004 => MDB2_ERROR_CANNOT_CREATE,
1005 => MDB2_ERROR_CANNOT_CREATE,
1006 => MDB2_ERROR_CANNOT_CREATE,
1007 => MDB2_ERROR_ALREADY_EXISTS,
1008 => MDB2_ERROR_CANNOT_DROP,
1022 => MDB2_ERROR_ALREADY_EXISTS,
1044 => MDB2_ERROR_ACCESS_VIOLATION,
1046 => MDB2_ERROR_NODBSELECTED,
1048 => MDB2_ERROR_CONSTRAINT,
1049 => MDB2_ERROR_NOSUCHDB,
1050 => MDB2_ERROR_ALREADY_EXISTS,
1051 => MDB2_ERROR_NOSUCHTABLE,
1054 => MDB2_ERROR_NOSUCHFIELD,
1061 => MDB2_ERROR_ALREADY_EXISTS,
1062 => MDB2_ERROR_ALREADY_EXISTS,
1064 => MDB2_ERROR_SYNTAX,
1091 => MDB2_ERROR_NOT_FOUND,
1100 => MDB2_ERROR_NOT_LOCKED,
1136 => MDB2_ERROR_VALUE_COUNT_ON_ROW,
1142 => MDB2_ERROR_ACCESS_VIOLATION,
1146 => MDB2_ERROR_NOSUCHTABLE,
1216 => MDB2_ERROR_CONSTRAINT,
1217 => MDB2_ERROR_CONSTRAINT,
1356 => MDB2_ERROR_DIVZERO,
1451 => MDB2_ERROR_CONSTRAINT,
1452 => MDB2_ERROR_CONSTRAINT,
);
}
if ($this->options['portability'] & MDB2_PORTABILITY_ERRORS) {
$ecode_map[1022] = MDB2_ERROR_CONSTRAINT;
$ecode_map[1048] = MDB2_ERROR_CONSTRAINT_NOT_NULL;
$ecode_map[1062] = MDB2_ERROR_CONSTRAINT;
} else {
// Doing this in case mode changes during runtime.
$ecode_map[1022] = MDB2_ERROR_ALREADY_EXISTS;
$ecode_map[1048] = MDB2_ERROR_CONSTRAINT;
$ecode_map[1062] = MDB2_ERROR_ALREADY_EXISTS;
}
if (isset($ecode_map[$native_code])) {
$error = $ecode_map[$native_code];
}
}
return array($error, $native_code, $native_msg);
}
// }}}
// {{{ escape()
/**
* Quotes a string so it can be safely used in a query. It will quote
* the text so it can safely be used within a query.
*
* @param string the input string to quote
* @param bool escape wildcards
*
* @return string quoted string
*
* @access public
*/
function escape($text, $escape_wildcards = false)
{
if ($escape_wildcards) {
$text = $this->escapePattern($text);
}
$connection = $this->getConnection();
if (PEAR::isError($connection)) {
return $connection;
}
$text = @mysql_real_escape_string($text, $connection);
return $text;
}
// }}}
// {{{
/**
* Start a transaction or set a savepoint.
*
* @param string name of a savepoint to set
* @return mixed MDB2_OK on success, a MDB2 error on failure
*
* @access public
*/
function beginTransaction($savepoint = null)
{
$this->debug('Starting transaction/savepoint', __FUNCTION__, array('is_manip' => true, 'savepoint' => $savepoint));
$this->_getServerCapabilities();
if (!is_null($savepoint)) {
if (!$this->supports('savepoints')) {
return $this->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
'savepoints are not supported', __FUNCTION__);
}
if (!$this->in_transaction) {
return $this->raiseError(MDB2_ERROR_INVALID, null, null,
'savepoint cannot be released when changes are auto committed', __FUNCTION__);
}
$query = 'SAVEPOINT '.$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');
}
$query = $this->start_transaction ? 'START TRANSACTION' : 'SET AUTOCOMMIT = 1';
$result =& $this->_doQuery($query, 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)) {
if (!$this->supports('savepoints')) {
return $this->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
'savepoints are not supported', __FUNCTION__);
}
$server_info = $this->getServerVersion();
if (version_compare($server_info['major'].'.'.$server_info['minor'].'.'.$server_info['patch'], '5.0.3', '<')) {
return MDB2_OK;
}
$query = 'RELEASE SAVEPOINT '.$savepoint;
return $this->_doQuery($query, true);
}
if (!$this->supports('transactions')) {
return $this->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
'transactions are not supported', __FUNCTION__);
}
$result =& $this->_doQuery('COMMIT', true);
if (PEAR::isError($result)) {
return $result;
}
if (!$this->start_transaction) {
$query = 'SET AUTOCOMMIT = 0';
$result =& $this->_doQuery($query, 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)) {
if (!$this->supports('savepoints')) {
return $this->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
'savepoints are not supported', __FUNCTION__);
}
$query = 'ROLLBACK TO SAVEPOINT '.$savepoint;
return $this->_doQuery($query, true);
}
$query = 'ROLLBACK';
$result =& $this->_doQuery($query, true);
if (PEAR::isError($result)) {
return $result;
}
if (!$this->start_transaction) {
$query = 'SET AUTOCOMMIT = 0';
$result =& $this->_doQuery($query, true);
if (PEAR::isError($result)) {
return $result;
}
}
$this->in_transaction = false;
return MDB2_OK;
}
// }}}
// {{{ function setTransactionIsolation()
/**
* Set the transacton isolation level.
*
* @param string standard isolation level
* READ UNCOMMITTED (allows dirty reads)
* READ COMMITTED (prevents dirty reads)
* REPEATABLE READ (prevents nonrepeatable reads)
* SERIALIZABLE (prevents phantom reads)
* @return mixed MDB2_OK on success, a MDB2 error on failure
*
* @access public
* @since 2.1.1
*/
function setTransactionIsolation($isolation)
{
$this->debug('Setting transaction isolation level', __FUNCTION__, array('is_manip' => true));
if (!$this->supports('transactions')) {
return $this->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
'transactions are not supported', __FUNCTION__);
}
switch ($isolation) {
case 'READ UNCOMMITTED':
case 'READ COMMITTED':
case 'REPEATABLE READ':
case 'SERIALIZABLE':
break;
default:
return $this->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
'isolation level is not supported: '.$isolation, __FUNCTION__);
}
$query = "SET SESSION TRANSACTION ISOLATION LEVEL $isolation";
return $this->_doQuery($query, true);
}
// }}}
// {{{ connect()
/**
* Connect to the database
*
* @return true on success, MDB2 Error Object on failure
*/
function connect()
{
if (is_resource($this->connection)) {
if (count(array_diff($this->connected_dsn, $this->dsn)) == 0
&& $this->opened_persistent == $this->options['persistent']
&& $this->connected_database_name == $this->database_name
) {
return MDB2_OK;
}
$this->disconnect(false);
}
if (!PEAR::loadExtension($this->phptype)) {
return $this->raiseError(MDB2_ERROR_NOT_FOUND, null, null,
'extension '.$this->phptype.' is not compiled into PHP', __FUNCTION__);
}
$params = array();
if ($this->dsn['protocol'] && $this->dsn['protocol'] == 'unix') {
$params[0] = ':' . $this->dsn['socket'];
} else {
$params[0] = $this->dsn['hostspec'] ? $this->dsn['hostspec']
: 'localhost';
if ($this->dsn['port']) {
$params[0].= ':' . $this->dsn['port'];
}
}
$params[] = $this->dsn['username'] ? $this->dsn['username'] : null;
$params[] = $this->dsn['password'] ? $this->dsn['password'] : null;
if (!$this->options['persistent']) {
if (isset($this->dsn['new_link'])
&& ($this->dsn['new_link'] == 'true' || $this->dsn['new_link'] === true)
) {
$params[] = true;
} else {
$params[] = false;
}
}
if (version_compare(phpversion(), '4.3.0', '>=')) {
$params[] = isset($this->dsn['client_flags'])
? $this->dsn['client_flags'] : null;
}
$connect_function = $this->options['persistent'] ? 'mysql_pconnect' : 'mysql_connect';
$connection = @call_user_func_array($connect_function, $params);
if (!$connection) {
if (($err = @mysql_error()) != '') {
return $this->raiseError(MDB2_ERROR_CONNECT_FAILED, null, null,
$err, __FUNCTION__);
} else {
return $this->raiseError(MDB2_ERROR_CONNECT_FAILED, null, null,
'unable to establish a connection', __FUNCTION__);
}
}
if (!empty($this->dsn['charset'])) {
$result = $this->setCharset($this->dsn['charset'], $connection);
if (PEAR::isError($result)) {
return $result;
}
}
$this->connection = $connection;
$this->connected_dsn = $this->dsn;
$this->connected_database_name = '';
$this->opened_persistent = $this->options['persistent'];
$this->dbsyntax = $this->dsn['dbsyntax'] ? $this->dsn['dbsyntax'] : $this->phptype;
if ($this->database_name) {
if ($this->database_name != $this->connected_database_name) {
if (!@mysql_select_db($this->database_name, $connection)) {
$err = $this->raiseError(null, null, null,
'Could not select the database: '.$this->database_name, __FUNCTION__);
return $err;
}
$this->connected_database_name = $this->database_name;
}
}
$this->supported['transactions'] = $this->options['use_transactions'];
if ($this->options['default_table_type']) {
switch (strtoupper($this->options['default_table_type'])) {
case 'BLACKHOLE':
case 'MEMORY':
case 'ARCHIVE':
case 'CSV':
case 'HEAP':
case 'ISAM':
case 'MERGE':
case 'MRG_ISAM':
case 'ISAM':
case 'MRG_MYISAM':
case 'MYISAM':
$this->supported['transactions'] = false;
$this->warnings[] = $this->options['default_table_type'] .
' is not a supported default table type';
break;
}
}
$this->_getServerCapabilities();
return MDB2_OK;
}
// }}}
// {{{ setCharset()
/**
* Set the charset on the current connection
*
* @param string charset
* @param resource connection handle
*
* @return true on success, MDB2 Error Object on failure
*/
function setCharset($charset, $connection = null)
{
if (is_null($connection)) {
$connection = $this->getConnection();
if (PEAR::isError($connection)) {
return $connection;
}
}
$query = "SET NAMES '".mysql_real_escape_string($charset, $connection)."'";
return $this->_doQuery($query, true, $connection);
}
// }}}
// {{{ disconnect()
/**
* Log out and disconnect from the database.
*
* @param boolean $force if the disconnect should be forced even if the
* connection is opened persistently
* @return mixed true on success, false if not connected and error
* object on error
* @access public
*/
function disconnect($force = true)
{
if (is_resource($this->connection)) {
if ($this->in_transaction) {
$dsn = $this->dsn;
$database_name = $this->database_name;
$persistent = $this->options['persistent'];
$this->dsn = $this->connected_dsn;
$this->database_name = $this->connected_database_name;
$this->options['persistent'] = $this->opened_persistent;
$this->rollback();
$this->dsn = $dsn;
$this->database_name = $database_name;
$this->options['persistent'] = $persistent;
}
if (!$this->opened_persistent || $force) {
@mysql_close($this->connection);
}
}
return parent::disconnect($force);
}
// }}}
// {{{ _doQuery()
/**
* Execute a query
* @param string $query query
* @param boolean $is_manip if the query is a manipulation query
* @param resource $connection
* @param string $database_name
* @return result or error object
* @access protected
*/
function &_doQuery($query, $is_manip = false, $connection = null, $database_name = null)
{
$this->last_query = $query;
$result = $this->debug($query, 'query', array('is_manip' => $is_manip, 'when' => 'pre'));
if ($result) {
if (PEAR::isError($result)) {
return $result;
}
$query = $result;
}
if ($this->options['disable_query']) {
$result = $is_manip ? 0 : null;
return $result;
}
if (is_null($connection)) {
$connection = $this->getConnection();
if (PEAR::isError($connection)) {
return $connection;
}
}
if (is_null($database_name)) {
$database_name = $this->database_name;
}
if ($database_name) {
if ($database_name != $this->connected_database_name) {
if (!@mysql_select_db($database_name, $connection)) {
$err = $this->raiseError(null, null, null,
'Could not select the database: '.$database_name, __FUNCTION__);
return $err;
}
$this->connected_database_name = $database_name;
}
}
$function = $this->options['result_buffering']
? 'mysql_query' : 'mysql_unbuffered_query';
$result = @$function($query, $connection);
if (!$result) {
$err =& $this->raiseError(null, null, null,
'Could not execute statement', __FUNCTION__);
return $err;
}
$this->debug($query, 'query', array('is_manip' => $is_manip, 'when' => 'post', 'result' => $result));
return $result;
}
// }}}
// {{{ _affectedRows()
/**
* Returns the number of rows affected
*
* @param resource $result
* @param resource $connection
* @return mixed MDB2 Error Object or the number of rows affected
* @access private
*/
function _affectedRows($connection, $result = null)
{
if (is_null($connection)) {
$connection = $this->getConnection();
if (PEAR::isError($connection)) {
return $connection;
}
}
return @mysql_affected_rows($connection);
}
// }}}
// {{{ _modifyQuery()
/**
* Changes a query string for various DBMS specific reasons
*
* @param string $query query to modify
* @param boolean $is_manip if it is a DML query
* @param integer $limit limit the number of rows
* @param integer $offset start reading from given offset
* @return string modified query
* @access protected
*/
function _modifyQuery($query, $is_manip, $limit, $offset)
{
if ($this->options['portability'] & MDB2_PORTABILITY_DELETE_COUNT) {
// "DELETE FROM table" gives 0 affected rows in MySQL.
// This little hack lets you know how many rows were deleted.
if (preg_match('/^\s*DELETE\s+FROM\s+(\S+)\s*$/i', $query)) {
$query = preg_replace('/^\s*DELETE\s+FROM\s+(\S+)\s*$/',
'DELETE FROM \1 WHERE 1=1', $query);
}
}
if ($limit > 0
&& !preg_match('/LIMIT\s*\d(?:\s*(?:,|OFFSET)\s*\d+)?(?:[^\)]*)?$/i', $query)
) {
$query = rtrim($query);
if (substr($query, -1) == ';') {
$query = substr($query, 0, -1);
}
// LIMIT doesn't always come last in the query
// @see http://dev.mysql.com/doc/refman/5.0/en/select.html
$after = '';
if (preg_match('/(\s+INTO\s+(?:OUT|DUMP)FILE\s.*)$/ims', $query, $matches)) {
$after = $matches[0];
$query = preg_replace('/(\s+INTO\s+(?:OUT|DUMP)FILE\s.*)$/ims', '', $query);
} elseif (preg_match('/(\s+FOR\s+UPDATE\s*)$/i', $query, $matches)) {
$after = $matches[0];
$query = preg_replace('/(\s+FOR\s+UPDATE\s*)$/im', '', $query);
} elseif (preg_match('/(\s+LOCK\s+IN\s+SHARE\s+MODE\s*)$/im', $query, $matches)) {
$after = $matches[0];
$query = preg_replace('/(\s+LOCK\s+IN\s+SHARE\s+MODE\s*)$/im', '', $query);
}
if ($is_manip) {
return $query . " LIMIT $limit" . $after;
} else {
return $query . " LIMIT $offset, $limit" . $after;
}
}
return $query;
}
// }}}
// {{{ getServerVersion()
/**
* return version information about the server
*
* @param bool $native determines if the raw version string should be returned
* @return mixed array/string with version information or MDB2 error object
* @access public
*/
function getServerVersion($native = false)
{
$connection = $this->getConnection();
if (PEAR::isError($connection)) {
return $connection;
}
if ($this->connected_server_info) {
$server_info = $this->connected_server_info;
} else {
$server_info = @mysql_get_server_info($connection);
}
if (!$server_info) {
return $this->raiseError(null, null, null,
'Could not get server information', __FUNCTION__);
}
// cache server_info
$this->connected_server_info = $server_info;
if (!$native) {
$tmp = explode('.', $server_info, 3);
if (isset($tmp[2]) && strpos($tmp[2], '-')) {
$tmp2 = explode('-', @$tmp[2], 2);
} else {
$tmp2[0] = isset($tmp[2]) ? $tmp[2] : null;
$tmp2[1] = null;
}
$server_info = array(
'major' => isset($tmp[0]) ? $tmp[0] : null,
'minor' => isset($tmp[1]) ? $tmp[1] : null,
'patch' => $tmp2[0],
'extra' => $tmp2[1],
'native' => $server_info,
);
}
return $server_info;
}
// }}}
// {{{ _getServerCapabilities()
/**
* Fetch some information about the server capabilities
* (transactions, subselects, prepared statements, etc).
*
* @access private
*/
function _getServerCapabilities()
{
static $already_checked = false;
if (!$already_checked) {
$already_checked = true;
//set defaults
$this->supported['sub_selects'] = 'emulated';
$this->supported['prepared_statements'] = 'emulated';
$this->start_transaction = false;
$this->varchar_max_length = 255;
$server_info = $this->getServerVersion();
if (is_array($server_info)) {
if (!version_compare($server_info['major'].'.'.$server_info['minor'].'.'.$server_info['patch'], '4.1.0', '<')) {
$this->supported['sub_selects'] = true;
$this->supported['prepared_statements'] = true;
}
if (!version_compare($server_info['major'].'.'.$server_info['minor'].'.'.$server_info['patch'], '4.0.14', '<')
|| !version_compare($server_info['major'].'.'.$server_info['minor'].'.'.$server_info['patch'], '4.1.1', '<')
) {
$this->supported['savepoints'] = true;
}
if (!version_compare($server_info['major'].'.'.$server_info['minor'].'.'.$server_info['patch'], '4.0.11', '<')) {
$this->start_transaction = true;
}
if (!version_compare($server_info['major'].'.'.$server_info['minor'].'.'.$server_info['patch'], '5.0.3', '<')) {
$this->varchar_max_length = 65532;
}
}
}
}
// }}}
// {{{ function _skipUserDefinedVariable($query, $position)
/**
* Utility method, used by prepare() to avoid misinterpreting MySQL user
* defined variables (SELECT @x:=5) for placeholders.
* Check if the placeholder is a false positive, i.e. if it is an user defined
* variable instead. If so, skip it and advance the position, otherwise
* return the current position, which is valid
*
* @param string $query
* @param integer $position current string cursor position
* @return integer $new_position
* @access protected
*/
function _skipUserDefinedVariable($query, $position)
{
$found = strpos(strrev(substr($query, 0, $position)), '@');
if ($found === false) {
return $position;
}
$pos = strlen($query) - strlen(substr($query, $position)) - $found - 1;
$substring = substr($query, $pos, $position - $pos + 2);
if (preg_match('/^@\w+:=$/', $substring)) {
return $position + 1; //found an user defined variable: skip it
}
return $position;
}
// }}}
// {{{ prepare()
/**
* Prepares a query for multiple execution with execute().
* With some database backends, this is emulated.
* prepare() requires a generic query as string like
* 'INSERT INTO numbers VALUES(?,?)' or
* 'INSERT INTO numbers VALUES(:foo,:bar)'.
* The ? and :[a-zA-Z] and are placeholders which can be set using
* bindParam() and the query can be send off using the execute() method.
*
* @param string $query the query to prepare
* @param mixed $types array that contains the types of the placeholders
* @param mixed $result_types array that contains the types of the columns in
* the result set or MDB2_PREPARE_RESULT, if set to
* MDB2_PREPARE_MANIP the query is handled as a manipulation query
* @param mixed $lobs key (field) value (parameter) pair for all lob placeholders
* @return mixed resource handle for the prepared query on success, a MDB2
* error on failure
* @access public
* @see bindParam, execute
*/
function &prepare($query, $types = null, $result_types = null, $lobs = array())
{
if ($this->options['emulate_prepared']
|| $this->supported['prepared_statements'] !== true
) {
$obj =& parent::prepare($query, $types, $result_types, $lobs);
return $obj;
}
$is_manip = ($result_types === MDB2_PREPARE_MANIP);
$offset = $this->offset;
$limit = $this->limit;
$this->offset = $this->limit = 0;
$query = $this->_modifyQuery($query, $is_manip, $limit, $offset);
$result = $this->debug($query, __FUNCTION__, array('is_manip' => $is_manip, 'when' => 'pre'));
if ($result) {
if (PEAR::isError($result)) {
return $result;
}
$query = $result;
}
$placeholder_type_guess = $placeholder_type = null;
$question = '?';
$colon = ':';
$positions = array();
$position = 0;
while ($position < strlen($query)) {
$q_position = strpos($query, $question, $position);
$c_position = strpos($query, $colon, $position);
if ($q_position && $c_position) {
$p_position = min($q_position, $c_position);
} elseif ($q_position) {
$p_position = $q_position;
} elseif ($c_position) {
$p_position = $c_position;
} else {
break;
}
if (is_null($placeholder_type)) {
$placeholder_type_guess = $query[$p_position];
}
$new_pos = $this->_skipDelimitedStrings($query, $position, $p_position);
if (PEAR::isError($new_pos)) {
return $new_pos;
}
if ($new_pos != $position) {
$position = $new_pos;
continue; //evaluate again starting from the new position
}
if ($query[$position] == $placeholder_type_guess) {
if (is_null($placeholder_type)) {
$placeholder_type = $query[$p_position];
$question = $colon = $placeholder_type;
}
if ($placeholder_type == ':') {
//make sure this is not part of an user defined variable
$new_pos = $this->_skipUserDefinedVariable($query, $position);
if ($new_pos != $position) {
$position = $new_pos;
continue; //evaluate again starting from the new position
}
$parameter = preg_replace('/^.{'.($position+1).'}([a-z0-9_]+).*$/si', '\\1', $query);
if ($parameter === '') {
$err =& $this->raiseError(MDB2_ERROR_SYNTAX, null, null,
'named parameter with an empty name', __FUNCTION__);
return $err;
}
$positions[$p_position] = $parameter;
$query = substr_replace($query, '?', $position, strlen($parameter)+1);
} else {
$positions[$p_position] = count($positions);
}
$position = $p_position + 1;
} else {
$position = $p_position;
}
}
$connection = $this->getConnection();
if (PEAR::isError($connection)) {
return $connection;
}
$statement_name = sprintf($this->options['statement_format'], $this->phptype, md5(time() + rand()));
$query = "PREPARE $statement_name FROM ".$this->quote($query, 'text');
$statement =& $this->_doQuery($query, true, $connection);
if (PEAR::isError($statement)) {
return $statement;
}
$class_name = 'MDB2_Statement_'.$this->phptype;
$obj =& new $class_name($this, $statement_name, $positions, $query, $types, $result_types, $is_manip, $limit, $offset);
$this->debug($query, __FUNCTION__, array('is_manip' => $is_manip, 'when' => 'post', 'result' => $obj));
return $obj;
}
// }}}
// {{{ replace()
/**
* Execute a SQL REPLACE query. A REPLACE query is identical to a INSERT
* query, except that if there is already a row in the table with the same
* key field values, the REPLACE query just updates its values instead of
* inserting a new row.
*
* The REPLACE type of query does not make part of the SQL standards. Since
* practically only MySQL implements it natively, this type of query is
* emulated through this method for other DBMS using standard types of
* queries inside a transaction to assure the atomicity of the operation.
*
* @access public
*
* @param string $table name of the table on which the REPLACE query will
* be executed.
* @param array $fields associative array that describes the fields and the
* values that will be inserted or updated in the specified table. The
* indexes of the array are the names of all the fields of the table. The
* values of the array are also associative arrays that describe the
* values and other properties of the table fields.
*
* Here follows a list of field properties that need to be specified:
*
* value:
* Value to be assigned to the specified field. This value may be
* of specified in database independent type format as this
* function can perform the necessary datatype conversions.
*
* Default:
* this property is required unless the Null property
* is set to 1.
*
* type
* Name of the type of the field. Currently, all types Metabase
* are supported except for clob and blob.
*
* Default: no type conversion
*
* null
* Boolean property that indicates that the value for this field
* should be set to null.
*
* The default value for fields missing in INSERT queries may be
* specified the definition of a table. Often, the default value
* is already null, but since the REPLACE may be emulated using
* an UPDATE query, make sure that all fields of the table are
* listed in this function argument array.
*
* Default: 0
*
* key
* Boolean property that indicates that this field should be
* handled as a primary key or at least as part of the compound
* unique index of the table that will determine the row that will
* updated if it exists or inserted a new row otherwise.
*
* This function will fail if no key field is specified or if the
* value of a key field is set to null because fields that are
* part of unique index they may not be null.
*
* Default: 0
*
* @return mixed MDB2_OK on success, a MDB2 error on failure
*/
function replace($table, $fields)
{
$count = count($fields);
$query = $values = '';
$keys = $colnum = 0;
for (reset($fields); $colnum < $count; next($fields), $colnum++) {
$name = key($fields);
if ($colnum > 0) {
$query .= ',';
$values.= ',';
}
$query.= $name;
if (isset($fields[$name]['null']) && $fields[$name]['null']) {
$value = 'NULL';
} else {
$type = isset($fields[$name]['type']) ? $fields[$name]['type'] : null;
$value = $this->quote($fields[$name]['value'], $type);
}
$values.= $value;
if (isset($fields[$name]['key']) && $fields[$name]['key']) {
if ($value === 'NULL') {
return $this->raiseError(MDB2_ERROR_CANNOT_REPLACE, null, null,
'key value '.$name.' may not be NULL', __FUNCTION__);
}
$keys++;
}
}
if ($keys == 0) {
return $this->raiseError(MDB2_ERROR_CANNOT_REPLACE, null, null,
'not specified which fields are keys', __FUNCTION__);
}
$connection = $this->getConnection();
if (PEAR::isError($connection)) {
return $connection;
}
$query = "REPLACE INTO $table ($query) VALUES ($values)";
$result =& $this->_doQuery($query, true, $connection);
if (PEAR::isError($result)) {
return $result;
}
return $this->_affectedRows($connection, $result);
}
// }}}
// {{{ nextID()
/**
* Returns the next free id of a sequence
*
* @param string $seq_name name of the sequence
* @param boolean $ondemand when true the sequence is
* automatic created, if it
* not exists
*
* @return mixed MDB2 Error Object or id
* @access public
*/
function nextID($seq_name, $ondemand = true)
{
$sequence_name = $this->quoteIdentifier($this->getSequenceName($seq_name), true);
$seqcol_name = $this->quoteIdentifier($this->options['seqcol_name'], true);
$query = "INSERT INTO $sequence_name ($seqcol_name) VALUES (NULL)";
$this->expectError(MDB2_ERROR_NOSUCHTABLE);
$result =& $this->_doQuery($query, true);
$this->popExpect();
if (PEAR::isError($result)) {
if ($ondemand && $result->getCode() == MDB2_ERROR_NOSUCHTABLE) {
$this->loadModule('Manager', null, true);
$result = $this->manager->createSequence($seq_name);
if (PEAR::isError($result)) {
return $this->raiseError($result, null, null,
'on demand sequence '.$seq_name.' could not be created', __FUNCTION__);
} else {
return $this->nextID($seq_name, false);
}
}
return $result;
}
$value = $this->lastInsertID();
if (is_numeric($value)) {
$query = "DELETE FROM $sequence_name WHERE $seqcol_name < $value";
$result =& $this->_doQuery($query, true);
if (PEAR::isError($result)) {
$this->warnings[] = 'nextID: could not delete previous sequence table values from '.$seq_name;
}
}
return $value;
}
// }}}
// {{{ lastInsertID()
/**
* Returns the autoincrement ID if supported or $id or fetches the current
* ID in a sequence called: $table.(empty($field) ? '' : '_'.$field)
*
* @param string $table name of the table into which a new row was inserted
* @param string $field name of the field into which a new row was inserted
* @return mixed MDB2 Error Object or id
* @access public
*/
function lastInsertID($table = null, $field = null)
{
// not using mysql_insert_id() due to http://pear.php.net/bugs/bug.php?id=8051
return $this->queryOne('SELECT LAST_INSERT_ID()', 'integer');
}
// }}}
// {{{ currID()
/**
* Returns the current id of a sequence
*
* @param string $seq_name name of the sequence
* @return mixed MDB2 Error Object or id
* @access public
*/
function currID($seq_name)
{
$sequence_name = $this->quoteIdentifier($this->getSequenceName($seq_name), true);
$seqcol_name = $this->quoteIdentifier($this->options['seqcol_name'], true);
$query = "SELECT MAX($seqcol_name) FROM $sequence_name";
return $this->queryOne($query, 'integer');
}
}
/**
* MDB2 MySQL result driver
*
* @package MDB2
* @category Database
* @author Lukas Smith <smith@pooteeweet.org>
*/
class MDB2_Result_mysql extends MDB2_Result_Common
{
// }}}
// {{{ fetchRow()
/**
* Fetch a row and insert the data into an existing array.
*
* @param int $fetchmode how the array data should be indexed
* @param int $rownum number of the row where the data can be found
* @return int data array on success, a MDB2 error on failure
* @access public
*/
function &fetchRow($fetchmode = MDB2_FETCHMODE_DEFAULT, $rownum = null)
{
if (!is_null($rownum)) {
$seek = $this->seek($rownum);
if (PEAR::isError($seek)) {
return $seek;
}
}
if ($fetchmode == MDB2_FETCHMODE_DEFAULT) {
$fetchmode = $this->db->fetchmode;
}
if ($fetchmode & MDB2_FETCHMODE_ASSOC) {
$row = @mysql_fetch_assoc($this->result);
if (is_array($row)
&& $this->db->options['portability'] & MDB2_PORTABILITY_FIX_CASE
) {
$row = array_change_key_case($row, $this->db->options['field_case']);
}
} else {
$row = @mysql_fetch_row($this->result);
}
if (!$row) {
if ($this->result === false) {
$err =& $this->db->raiseError(MDB2_ERROR_NEED_MORE_DATA, null, null,
'resultset has already been freed', __FUNCTION__);
return $err;
}
$null = null;
return $null;
}
$mode = $this->db->options['portability'] & MDB2_PORTABILITY_EMPTY_TO_NULL;
if ($mode) {
$this->db->_fixResultArrayValues($row, $mode);
}
if (!empty($this->types)) {
$row = $this->db->datatype->convertResultRow($this->types, $row, false);
}
if (!empty($this->values)) {
$this->_assignBindColumns($row);
}
if ($fetchmode === MDB2_FETCHMODE_OBJECT) {
$object_class = $this->db->options['fetch_class'];
if ($object_class == 'stdClass') {
$row = (object) $row;
} else {
$row = &new $object_class($row);
}
}
++$this->rownum;
return $row;
}
// }}}
// {{{ _getColumnNames()
/**
* Retrieve the names of columns returned by the DBMS in a query result.
*
* @return mixed Array variable that holds the names of columns as keys
* or an MDB2 error on failure.
* Some DBMS may not return any columns when the result set
* does not contain any rows.
* @access private
*/
function _getColumnNames()
{
$columns = array();
$numcols = $this->numCols();
if (PEAR::isError($numcols)) {
return $numcols;
}
for ($column = 0; $column < $numcols; $column++) {
$column_name = @mysql_field_name($this->result, $column);
$columns[$column_name] = $column;
}
if ($this->db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
$columns = array_change_key_case($columns, $this->db->options['field_case']);
}
return $columns;
}
// }}}
// {{{ numCols()
/**
* Count the number of columns returned by the DBMS in a query result.
*
* @return mixed integer value with the number of columns, a MDB2 error
* on failure
* @access public
*/
function numCols()
{
$cols = @mysql_num_fields($this->result);
if (is_null($cols)) {
if ($this->result === false) {
return $this->db->raiseError(MDB2_ERROR_NEED_MORE_DATA, null, null,
'resultset has already been freed', __FUNCTION__);
} elseif (is_null($this->result)) {
return count($this->types);
}
return $this->db->raiseError(null, null, null,
'Could not get column count', __FUNCTION__);
}
return $cols;
}
// }}}
// {{{ free()
/**
* Free the internal resources associated with result.
*
* @return boolean true on success, false if result is invalid
* @access public
*/
function free()
{
if (is_resource($this->result) && $this->db->connection) {
$free = @mysql_free_result($this->result);
if ($free === false) {
return $this->db->raiseError(null, null, null,
'Could not free result', __FUNCTION__);
}
}
$this->result = false;
return MDB2_OK;
}
}
/**
* MDB2 MySQL buffered result driver
*
* @package MDB2
* @category Database
* @author Lukas Smith <smith@pooteeweet.org>
*/
class MDB2_BufferedResult_mysql extends MDB2_Result_mysql
{
// }}}
// {{{ seek()
/**
* Seek to a specific row in a result set
*
* @param int $rownum number of the row where the data can be found
* @return mixed MDB2_OK on success, a MDB2 error on failure
* @access public
*/
function seek($rownum = 0)
{
if ($this->rownum != ($rownum - 1) && !@mysql_data_seek($this->result, $rownum)) {
if ($this->result === false) {
return $this->db->raiseError(MDB2_ERROR_NEED_MORE_DATA, null, null,
'resultset has already been freed', __FUNCTION__);
} elseif (is_null($this->result)) {
return MDB2_OK;
}
return $this->db->raiseError(MDB2_ERROR_INVALID, null, null,
'tried to seek to an invalid row number ('.$rownum.')', __FUNCTION__);
}
$this->rownum = $rownum - 1;
return MDB2_OK;
}
// }}}
// {{{ valid()
/**
* Check if the end of the result set has been reached
*
* @return mixed true or false on sucess, a MDB2 error on failure
* @access public
*/
function valid()
{
$numrows = $this->numRows();
if (PEAR::isError($numrows)) {
return $numrows;
}
return $this->rownum < ($numrows - 1);
}
// }}}
// {{{ numRows()
/**
* Returns the number of rows in a result object
*
* @return mixed MDB2 Error Object or the number of rows
* @access public
*/
function numRows()
{
$rows = @mysql_num_rows($this->result);
if (is_null($rows)) {
if ($this->result === false) {
return $this->db->raiseError(MDB2_ERROR_NEED_MORE_DATA, null, null,
'resultset has already been freed', __FUNCTION__);
} elseif (is_null($this->result)) {
return 0;
}
return $this->db->raiseError(null, null, null,
'Could not get row count', __FUNCTION__);
}
return $rows;
}
}
/**
* MDB2 MySQL statement driver
*
* @package MDB2
* @category Database
* @author Lukas Smith <smith@pooteeweet.org>
*/
class MDB2_Statement_mysql extends MDB2_Statement_Common
{
// {{{ _execute()
/**
* Execute a prepared query statement helper method.
*
* @param mixed $result_class string which specifies which result class to use
* @param mixed $result_wrap_class string which specifies which class to wrap results in
* @return mixed a result handle or MDB2_OK on success, a MDB2 error on failure
* @access private
*/
function &_execute($result_class = true, $result_wrap_class = false)
{
if (is_null($this->statement)) {
$result =& parent::_execute($result_class, $result_wrap_class);
return $result;
}
$this->db->last_query = $this->query;
$this->db->debug($this->query, 'execute', array('is_manip' => $this->is_manip, 'when' => 'pre', 'parameters' => $this->values));
if ($this->db->getOption('disable_query')) {
$result = $this->is_manip ? 0 : null;
return $result;
}
$connection = $this->db->getConnection();
if (PEAR::isError($connection)) {
return $connection;
}
$query = 'EXECUTE '.$this->statement;
if (!empty($this->positions)) {
$parameters = array();
foreach ($this->positions as $parameter) {
if (!array_key_exists($parameter, $this->values)) {
return $this->db->raiseError(MDB2_ERROR_NOT_FOUND, null, null,
'Unable to bind to missing placeholder: '.$parameter, __FUNCTION__);
}
$value = $this->values[$parameter];
$type = array_key_exists($parameter, $this->types) ? $this->types[$parameter] : null;
if (is_resource($value) || $type == 'clob' || $type == 'blob') {
if (!is_resource($value) && preg_match('/^(\w+:\/\/)(.*)$/', $value, $match)) {
if ($match[1] == 'file://') {
$value = $match[2];
}
$value = @fopen($value, 'r');
$close = true;
}
if (is_resource($value)) {
$data = '';
while (!@feof($value)) {
$data.= @fread($value, $this->db->options['lob_buffer_length']);
}
if ($close) {
@fclose($value);
}
$value = $data;
}
}
$quoted = $this->db->quote($value, $type);
if (PEAR::isError($quoted)) {
return $quoted;
}
$param_query = 'SET @'.$parameter.' = '.$quoted;
$result = $this->db->_doQuery($param_query, true, $connection);
if (PEAR::isError($result)) {
return $result;
}
}
$query.= ' USING @'.implode(', @', array_values($this->positions));
}
$result = $this->db->_doQuery($query, $this->is_manip, $connection);
if (PEAR::isError($result)) {
return $result;
}
if ($this->is_manip) {
$affected_rows = $this->db->_affectedRows($connection, $result);
return $affected_rows;
}
$result =& $this->db->_wrapResult($result, $this->result_types,
$result_class, $result_wrap_class, $this->limit, $this->offset);
$this->db->debug($this->query, 'execute', array('is_manip' => $this->is_manip, 'when' => 'post', 'result' => $result));
return $result;
}
// }}}
// {{{ free()
/**
* Release resources allocated for the specified prepared query.
*
* @return mixed MDB2_OK on success, a MDB2 error on failure
* @access public
*/
function free()
{
if (is_null($this->positions)) {
return $this->db->raiseError(MDB2_ERROR, null, null,
'Prepared statement has already been freed', __FUNCTION__);
}
$result = MDB2_OK;
if (!is_null($this->statement)) {
$connection = $this->db->getConnection();
if (PEAR::isError($connection)) {
return $connection;
}
$query = 'DEALLOCATE PREPARE '.$this->statement;
$result = $this->db->_doQuery($query, true, $connection);
}
parent::free();
return $result;
}
}
?>
|