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	<?php

	/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */

	/**
	* The PEAR DB driver for PHP's mysql extension
	* for interacting with MySQL databases
	*
	* PHP versions 4 and 5
	*
	* LICENSE: This source file is subject to version 3.0 of the PHP license
	* that is available through the world-wide-web at the following URI:
	* http://www.php.net/license/3_0.txt. If you did not receive a copy of
	* the PHP License and are unable to obtain it through the web, please
	* send a note to license@php.net so we can mail you a copy immediately.
	*
	* @category Database
	* @package DB
	* @author Stig Bakken <ssb@php.net>
	* @author Daniel Convissor <danielc@php.net>
	* @copyright 1997-2005 The PHP Group
	* @license http://www.php.net/license/3_0.txt PHP License 3.0
	* @version CVS: $Id$
	* @link http://pear.php.net/package/DB
	*/

	/**
	* Obtain the DB_common class so it can be extended from
	*/
	require_once 'DB/common.php';

	/**
	* The methods PEAR DB uses to interact with PHP's mysql extension
	* for interacting with MySQL databases
	*
	* These methods overload the ones declared in DB_common.
	*
	* @category Database
	* @package DB
	* @author Stig Bakken <ssb@php.net>
	* @author Daniel Convissor <danielc@php.net>
	* @copyright 1997-2005 The PHP Group
	* @license http://www.php.net/license/3_0.txt PHP License 3.0
	* @version Release: @package_version@
	* @link http://pear.php.net/package/DB
	*/
	class DB_mysql extends DB_common
	{
	// {{{ properties

	/**
	* The DB driver type (mysql, oci8, odbc, etc.)
	* @var string
	*/
	var $phptype = 'mysql';

	/**
	* The database syntax variant to be used (db2, access, etc.), if any
	* @var string
	*/
	var $dbsyntax = 'mysql';

	/**
	* The capabilities of this DB implementation
	*
	* The 'new_link' element contains the PHP version that first provided
	* new_link support for this DBMS. Contains false if it's unsupported.
	*
	* Meaning of the 'limit' element:
	* + 'emulate' = emulate with fetch row by number
	* + 'alter' = alter the query
	* + false = skip rows
	*
	* @var array
	*/
	var $features = array(
	'limit' => 'alter',
	'new_link' => '4.2.0',
	'numrows' => true,
	'pconnect' => true,
	'prepare' => false,
	'ssl' => false,
	'transactions' => true,
	);

	/**
	* A mapping of native error codes to DB error codes
	* @var array
	*/
	var $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,
	1044 => DB_ERROR_ACCESS_VIOLATION,
	1046 => DB_ERROR_NODBSELECTED,
	1048 => DB_ERROR_CONSTRAINT,
	1049 => DB_ERROR_NOSUCHDB,
	1050 => DB_ERROR_ALREADY_EXISTS,
	1051 => DB_ERROR_NOSUCHTABLE,
	1054 => DB_ERROR_NOSUCHFIELD,
	1061 => DB_ERROR_ALREADY_EXISTS,
	1062 => DB_ERROR_ALREADY_EXISTS,
	1064 => DB_ERROR_SYNTAX,
	1091 => DB_ERROR_NOT_FOUND,
	1100 => DB_ERROR_NOT_LOCKED,
	1136 => DB_ERROR_VALUE_COUNT_ON_ROW,
	1142 => DB_ERROR_ACCESS_VIOLATION,
	1146 => DB_ERROR_NOSUCHTABLE,
	1216 => DB_ERROR_CONSTRAINT,
	1217 => DB_ERROR_CONSTRAINT,
	);

	/**
	* The raw database connection created by PHP
	* @var resource
	*/
	var $connection;

	/**
	* The DSN information for connecting to a database
	* @var array
	*/
	var $dsn = array();


	/**
	* Should data manipulation queries be committed automatically?
	* @var bool
	* @access private
	*/
	var $autocommit = true;

	/**
	* The quantity of transactions begun
	*
	* {@internal While this is private, it can't actually be designated
	* private in PHP 5 because it is directly accessed in the test suite.}}
	*
	* @var integer
	* @access private
	*/
	var $transaction_opcount = 0;

	/**
	* The database specified in the DSN
	*
	* It's a fix to allow calls to different databases in the same script.
	*
	* @var string
	* @access private
	*/
	var $_db = '';


	// }}}
	// {{{ constructor

	/**
	* This constructor calls <kbd>$this->DB_common()</kbd>
	*
	* @return void
	*/
	function DB_mysql()
	{
	$this->DB_common();
	}

	// }}}
	// {{{ connect()

	/**
	* Connect to the database server, log in and open the database
	*
	* Don't call this method directly. Use DB::connect() instead.
	*
	* PEAR DB's mysql driver supports the following extra DSN options:
	* + new_link If set to true, causes subsequent calls to connect()
	* to return a new connection link instead of the
	* existing one. WARNING: this is not portable to
	* other DBMS's. Available since PEAR DB 1.7.0.
	* + client_flags Any combination of MYSQL_CLIENT_* constants.
	* Only used if PHP is at version 4.3.0 or greater.
	* Available since PEAR DB 1.7.0.
	*
	* @param array $dsn the data source name
	* @param bool $persistent should the connection be persistent?
	*
	* @return int DB_OK on success. A DB_Error object on failure.
	*/
	function connect($dsn, $persistent = false)
	{
	if (!PEAR::loadExtension('mysql')) {
	return $this->raiseError(DB_ERROR_EXTENSION_NOT_FOUND);
	}

	$this->dsn = $dsn;
	if ($dsn['dbsyntax']) {
	$this->dbsyntax = $dsn['dbsyntax'];
	}

	$params = array();
	if ($dsn['protocol'] && $dsn['protocol'] == 'unix') {
	$params[0] = ':' . $dsn['socket'];
	} else {
	$params[0] = $dsn['hostspec'] ? $dsn['hostspec']
	: 'localhost';
	if ($dsn['port']) {
	$params[0] .= ':' . $dsn['port'];
	}
	}
	$params[] = $dsn['username'] ? $dsn['username'] : null;
	$params[] = $dsn['password'] ? $dsn['password'] : null;

	if (!$persistent) {
	if (isset($dsn['new_link'])
	&& ($dsn['new_link'] == 'true' \|\| $dsn['new_link'] === true))
	{
	$params[] = true;
	} else {
	$params[] = false;
	}
	}
	if (version_compare(phpversion(), '4.3.0', '>=')) {
	$params[] = isset($dsn['client_flags'])
	? $dsn['client_flags'] : null;
	}

	$connect_function = $persistent ? 'mysql_pconnect' : 'mysql_connect';

	$ini = ini_get('track_errors');
	$php_errormsg = '';
	if ($ini) {
	$this->connection = @call_user_func_array($connect_function,
	$params);
	} else {
	ini_set('track_errors', 1);
	$this->connection = @call_user_func_array($connect_function,
	$params);
	ini_set('track_errors', $ini);
	}

	if (!$this->connection) {
	if (($err = @mysql_error()) != '') {
	return $this->raiseError(DB_ERROR_CONNECT_FAILED,
	null, null, null,
	$err);
	} else {
	return $this->raiseError(DB_ERROR_CONNECT_FAILED,
	null, null, null,
	$php_errormsg);
	}
	}

	if ($dsn['database']) {
	if (!@mysql_select_db($dsn['database'], $this->connection)) {
	return $this->mysqlRaiseError();
	}
	$this->_db = $dsn['database'];
	}

	return DB_OK;
	}

	// }}}
	// {{{ disconnect()

	/**
	* Disconnects from the database server
	*
	* @return bool TRUE on success, FALSE on failure
	*/
	function disconnect()
	{
	$ret = @mysql_close($this->connection);
	$this->connection = null;
	return $ret;
	}

	// }}}
	// {{{ simpleQuery()

	/**
	* Sends a query to the database server
	*
	* Generally uses mysql_query(). If you want to use
	* mysql_unbuffered_query() set the "result_buffering" option to 0 using
	* setOptions(). This option was added in Release 1.7.0.
	*
	* @param string the SQL query string
	*
	* @return mixed + a PHP result resrouce for successful SELECT queries
	* + the DB_OK constant for other successful queries
	* + a DB_Error object on failure
	*/
	function simpleQuery($query)
	{
	$ismanip = DB::isManip($query);
	$this->last_query = $query;
	$query = $this->modifyQuery($query);
	if ($this->_db) {
	if (!@mysql_select_db($this->_db, $this->connection)) {
	return $this->mysqlRaiseError(DB_ERROR_NODBSELECTED);
	}
	}
	if (!$this->autocommit && $ismanip) {
	if ($this->transaction_opcount == 0) {
	$result = @mysql_query('SET AUTOCOMMIT=0', $this->connection);
	$result = @mysql_query('BEGIN', $this->connection);
	if (!$result) {
	return $this->mysqlRaiseError();
	}
	}
	$this->transaction_opcount++;
	}
	if (!$this->options['result_buffering']) {
	$result = @mysql_unbuffered_query($query, $this->connection);
	} else {
	$result = @mysql_query($query, $this->connection);
	}
	if (!$result) {
	return $this->mysqlRaiseError();
	}
	if (is_resource($result)) {
	return $result;
	}
	return DB_OK;
	}

	// }}}
	// {{{ nextResult()

	/**
	* Move the internal mysql result pointer to the next available result
	*
	* This method has not been implemented yet.
	*
	* @param a valid sql result resource
	*
	* @return false
	*/
	function nextResult($result)
	{
	return false;
	}

	// }}}
	// {{{ fetchInto()

	/**
	* Places a row from the result set into the given array
	*
	* Formating of the array and the data therein are configurable.
	* See DB_result::fetchInto() for more information.
	*
	* This method is not meant to be called directly. Use
	* DB_result::fetchInto() instead. It can't be declared "protected"
	* because DB_result is a separate object.
	*
	* @param resource $result the query result resource
	* @param array $arr the referenced array to put the data in
	* @param int $fetchmode how the resulting array should be indexed
	* @param int $rownum the row number to fetch (0 = first row)
	*
	* @return mixed DB_OK on success, NULL when the end of a result set is
	* reached or on failure
	*
	* @see DB_result::fetchInto()
	*/
	function fetchInto($result, &$arr, $fetchmode, $rownum = null)
	{
	if ($rownum !== null) {
	if (!@mysql_data_seek($result, $rownum)) {
	return null;
	}
	}
	if ($fetchmode & DB_FETCHMODE_ASSOC) {
	$arr = @mysql_fetch_array($result, MYSQL_ASSOC);
	if ($this->options['portability'] & DB_PORTABILITY_LOWERCASE && $arr) {
	$arr = array_change_key_case($arr, CASE_LOWER);
	}
	} else {
	$arr = @mysql_fetch_row($result);
	}
	if (!$arr) {
	return null;
	}
	if ($this->options['portability'] & DB_PORTABILITY_RTRIM) {
	/*
	* Even though this DBMS already trims output, we do this because
	* a field might have intentional whitespace at the end that
	* gets removed by DB_PORTABILITY_RTRIM under another driver.
	*/
	$this->_rtrimArrayValues($arr);
	}
	if ($this->options['portability'] & DB_PORTABILITY_NULL_TO_EMPTY) {
	$this->_convertNullArrayValuesToEmpty($arr);
	}
	return DB_OK;
	}

	// }}}
	// {{{ freeResult()

	/**
	* Deletes the result set and frees the memory occupied by the result set
	*
	* This method is not meant to be called directly. Use
	* DB_result::free() instead. It can't be declared "protected"
	* because DB_result is a separate object.
	*
	* @param resource $result PHP's query result resource
	*
	* @return bool TRUE on success, FALSE if $result is invalid
	*
	* @see DB_result::free()
	*/
	function freeResult($result)
	{
	return @mysql_free_result($result);
	}

	// }}}
	// {{{ numCols()

	/**
	* Gets the number of columns in a result set
	*
	* This method is not meant to be called directly. Use
	* DB_result::numCols() instead. It can't be declared "protected"
	* because DB_result is a separate object.
	*
	* @param resource $result PHP's query result resource
	*
	* @return int the number of columns. A DB_Error object on failure.
	*
	* @see DB_result::numCols()
	*/
	function numCols($result)
	{
	$cols = @mysql_num_fields($result);
	if (!$cols) {
	return $this->mysqlRaiseError();
	}
	return $cols;
	}

	// }}}
	// {{{ numRows()

	/**
	* Gets the number of rows in a result set
	*
	* This method is not meant to be called directly. Use
	* DB_result::numRows() instead. It can't be declared "protected"
	* because DB_result is a separate object.
	*
	* @param resource $result PHP's query result resource
	*
	* @return int the number of rows. A DB_Error object on failure.
	*
	* @see DB_result::numRows()
	*/
	function numRows($result)
	{
	$rows = @mysql_num_rows($result);
	if ($rows === null) {
	return $this->mysqlRaiseError();
	}
	return $rows;
	}

	// }}}
	// {{{ autoCommit()

	/**
	* Enables or disables automatic commits
	*
	* @param bool $onoff true turns it on, false turns it off
	*
	* @return int DB_OK on success. A DB_Error object if the driver
	* doesn't support auto-committing transactions.
	*/
	function autoCommit($onoff = false)
	{
	// XXX if $this->transaction_opcount > 0, we should probably
	// issue a warning here.
	$this->autocommit = $onoff ? true : false;
	return DB_OK;
	}

	// }}}
	// {{{ commit()

	/**
	* Commits the current transaction
	*
	* @return int DB_OK on success. A DB_Error object on failure.
	*/
	function commit()
	{
	if ($this->transaction_opcount > 0) {
	if ($this->_db) {
	if (!@mysql_select_db($this->_db, $this->connection)) {
	return $this->mysqlRaiseError(DB_ERROR_NODBSELECTED);
	}
	}
	$result = @mysql_query('COMMIT', $this->connection);
	$result = @mysql_query('SET AUTOCOMMIT=1', $this->connection);
	$this->transaction_opcount = 0;
	if (!$result) {
	return $this->mysqlRaiseError();
	}
	}
	return DB_OK;
	}

	// }}}
	// {{{ rollback()

	/**
	* Reverts the current transaction
	*
	* @return int DB_OK on success. A DB_Error object on failure.
	*/
	function rollback()
	{
	if ($this->transaction_opcount > 0) {
	if ($this->_db) {
	if (!@mysql_select_db($this->_db, $this->connection)) {
	return $this->mysqlRaiseError(DB_ERROR_NODBSELECTED);
	}
	}
	$result = @mysql_query('ROLLBACK', $this->connection);
	$result = @mysql_query('SET AUTOCOMMIT=1', $this->connection);
	$this->transaction_opcount = 0;
	if (!$result) {
	return $this->mysqlRaiseError();
	}
	}
	return DB_OK;
	}

	// }}}
	// {{{ affectedRows()

	/**
	* Determines the number of rows affected by a data maniuplation query
	*
	* 0 is returned for queries that don't manipulate data.
	*
	* @return int the number of rows. A DB_Error object on failure.
	*/
	function affectedRows()
	{
	if (DB::isManip($this->last_query)) {
	return @mysql_affected_rows($this->connection);
	} else {
	return 0;
	}
	}

	// }}}
	// {{{ nextId()

	/**
	* Returns the next free id in a sequence
	*
	* @param string $seq_name name of the sequence
	* @param boolean $ondemand when true, the seqence is automatically
	* created if it does not exist
	*
	* @return int the next id number in the sequence.
	* A DB_Error object on failure.
	*
	* @see DB_common::nextID(), DB_common::getSequenceName(),
	* DB_mysql::createSequence(), DB_mysql::dropSequence()
	*/
	function nextId($seq_name, $ondemand = true)
	{
	$seqname = $this->getSequenceName($seq_name);
	do {
	$repeat = 0;
	$this->pushErrorHandling(PEAR_ERROR_RETURN);
	$result = $this->query("UPDATE ${seqname} ".
	'SET id=LAST_INSERT_ID(id+1)');
	$this->popErrorHandling();
	if ($result === DB_OK) {
	// COMMON CASE
	$id = @mysql_insert_id($this->connection);
	if ($id != 0) {
	return $id;
	}
	// EMPTY SEQ TABLE
	// Sequence table must be empty for some reason, so fill
	// it and return 1 and obtain a user-level lock
	$result = $this->getOne("SELECT GET_LOCK('${seqname}_lock',10)");
	if (DB::isError($result)) {
	return $this->raiseError($result);
	}
	if ($result == 0) {
	// Failed to get the lock
	return $this->mysqlRaiseError(DB_ERROR_NOT_LOCKED);
	}

	// add the default value
	$result = $this->query("REPLACE INTO ${seqname} (id) VALUES (0)");
	if (DB::isError($result)) {
	return $this->raiseError($result);
	}

	// Release the lock
	$result = $this->getOne('SELECT RELEASE_LOCK('
	. "'${seqname}_lock')");
	if (DB::isError($result)) {
	return $this->raiseError($result);
	}
	// We know what the result will be, so no need to try again
	return 1;

	} elseif ($ondemand && DB::isError($result) &&
	$result->getCode() == DB_ERROR_NOSUCHTABLE)
	{
	// ONDEMAND TABLE CREATION
	$result = $this->createSequence($seq_name);
	if (DB::isError($result)) {
	return $this->raiseError($result);
	} else {
	$repeat = 1;
	}

	} elseif (DB::isError($result) &&
	$result->getCode() == DB_ERROR_ALREADY_EXISTS)
	{
	// BACKWARDS COMPAT
	// see _BCsequence() comment
	$result = $this->_BCsequence($seqname);
	if (DB::isError($result)) {
	return $this->raiseError($result);
	}
	$repeat = 1;
	}
	} while ($repeat);

	return $this->raiseError($result);
	}

	// }}}
	// {{{ createSequence()

	/**
	* Creates a new sequence
	*
	* @param string $seq_name name of the new sequence
	*
	* @return int DB_OK on success. A DB_Error object on failure.
	*
	* @see DB_common::createSequence(), DB_common::getSequenceName(),
	* DB_mysql::nextID(), DB_mysql::dropSequence()
	*/
	function createSequence($seq_name)
	{
	$seqname = $this->getSequenceName($seq_name);
	$res = $this->query('CREATE TABLE ' . $seqname
	. ' (id INTEGER UNSIGNED AUTO_INCREMENT NOT NULL,'
	. ' PRIMARY KEY(id))');
	if (DB::isError($res)) {
	return $res;
	}
	// insert yields value 1, nextId call will generate ID 2
	$res = $this->query("INSERT INTO ${seqname} (id) VALUES (0)");
	if (DB::isError($res)) {
	return $res;
	}
	// so reset to zero
	return $this->query("UPDATE ${seqname} SET id = 0");
	}

	// }}}
	// {{{ dropSequence()

	/**
	* Deletes a sequence
	*
	* @param string $seq_name name of the sequence to be deleted
	*
	* @return int DB_OK on success. A DB_Error object on failure.
	*
	* @see DB_common::dropSequence(), DB_common::getSequenceName(),
	* DB_mysql::nextID(), DB_mysql::createSequence()
	*/
	function dropSequence($seq_name)
	{
	return $this->query('DROP TABLE ' . $this->getSequenceName($seq_name));
	}

	// }}}
	// {{{ _BCsequence()

	/**
	* Backwards compatibility with old sequence emulation implementation
	* (clean up the dupes)
	*
	* @param string $seqname the sequence name to clean up
	*
	* @return bool true on success. A DB_Error object on failure.
	*
	* @access private
	*/
	function _BCsequence($seqname)
	{
	// Obtain a user-level lock... this will release any previous
	// application locks, but unlike LOCK TABLES, it does not abort
	// the current transaction and is much less frequently used.
	$result = $this->getOne("SELECT GET_LOCK('${seqname}_lock',10)");
	if (DB::isError($result)) {
	return $result;
	}
	if ($result == 0) {
	// Failed to get the lock, can't do the conversion, bail
	// with a DB_ERROR_NOT_LOCKED error
	return $this->mysqlRaiseError(DB_ERROR_NOT_LOCKED);
	}

	$highest_id = $this->getOne("SELECT MAX(id) FROM ${seqname}");
	if (DB::isError($highest_id)) {
	return $highest_id;
	}
	// This should kill all rows except the highest
	// We should probably do something if $highest_id isn't
	// numeric, but I'm at a loss as how to handle that...
	$result = $this->query('DELETE FROM ' . $seqname
	. " WHERE id <> $highest_id");
	if (DB::isError($result)) {
	return $result;
	}

	// If another thread has been waiting for this lock,
	// it will go thru the above procedure, but will have no
	// real effect
	$result = $this->getOne("SELECT RELEASE_LOCK('${seqname}_lock')");
	if (DB::isError($result)) {
	return $result;
	}
	return true;
	}

	// }}}
	// {{{ quoteIdentifier()

	/**
	* Quotes a string so it can be safely used as a table or column name
	*
	* MySQL can't handle the backtick character (<kbd>`</kbd>) in
	* table or column names.
	*
	* @param string $str identifier name to be quoted
	*
	* @return string quoted identifier string
	*
	* @see DB_common::quoteIdentifier()
	* @since Method available since Release 1.6.0
	*/
	function quoteIdentifier($str)
	{
	return '`' . $str . '`';
	}

	// }}}
	// {{{ quote()

	/**
	* @deprecated Deprecated in release 1.6.0
	*/
	function quote($str)
	{
	return $this->quoteSmart($str);
	}

	// }}}
	// {{{ escapeSimple()

	/**
	* Escapes a string according to the current DBMS's standards
	*
	* @param string $str the string to be escaped
	*
	* @return string the escaped string
	*
	* @see DB_common::quoteSmart()
	* @since Method available since Release 1.6.0
	*/
	function escapeSimple($str)
	{
	if (function_exists('mysql_real_escape_string')) {
	return @mysql_real_escape_string($str, $this->connection);
	} else {
	return @mysql_escape_string($str);
	}
	}

	// }}}
	// {{{ modifyQuery()

	/**
	* Changes a query string for various DBMS specific reasons
	*
	* This little hack lets you know how many rows were deleted
	* when running a "DELETE FROM table" query. Only implemented
	* if the DB_PORTABILITY_DELETE_COUNT portability option is on.
	*
	* @param string $query the query string to modify
	*
	* @return string the modified query string
	*
	* @access protected
	* @see DB_common::setOption()
	*/
	function modifyQuery($query)
	{
	if ($this->options['portability'] & DB_PORTABILITY_DELETE_COUNT) {
	// "DELETE FROM table" gives 0 affected rows in MySQL.
	// This little hack lets you know how many rows were deleted.
	if (preg_match('/^\sDELETE\s+FROM\s+(\S+)\s$/i', $query)) {
	$query = preg_replace('/^\sDELETE\s+FROM\s+(\S+)\s$/',
	'DELETE FROM \1 WHERE 1=1', $query);
	}
	}
	return $query;
	}

	// }}}
	// {{{ modifyLimitQuery()

	/**
	* Adds LIMIT clauses to a query string according to current DBMS standards
	*
	* @param string $query the query to modify
	* @param int $from the row to start to fetching (0 = the first row)
	* @param int $count the numbers of rows to fetch
	* @param mixed $params array, string or numeric data to be used in
	* execution of the statement. Quantity of items
	* passed must match quantity of placeholders in
	* query: meaning 1 placeholder for non-array
	* parameters or 1 placeholder per array element.
	*
	* @return string the query string with LIMIT clauses added
	*
	* @access protected
	*/
	function modifyLimitQuery($query, $from, $count, $params = array())
	{
	if (DB::isManip($query)) {
	return $query . " LIMIT $count";
	} else {
	return $query . " LIMIT $from, $count";
	}
	}

	// }}}
	// {{{ mysqlRaiseError()

	/**
	* Produces a DB_Error object regarding the current problem
	*
	* @param int $errno if the error is being manually raised pass a
	* DB_ERROR* constant here. If this isn't passed
	* the error information gathered from the DBMS.
	*
	* @return object the DB_Error object
	*
	* @see DB_common::raiseError(),
	* DB_mysql::errorNative(), DB_common::errorCode()
	*/
	function mysqlRaiseError($errno = null)
	{
	if ($errno === null) {
	if ($this->options['portability'] & DB_PORTABILITY_ERRORS) {
	$this->errorcode_map[1022] = DB_ERROR_CONSTRAINT;
	$this->errorcode_map[1048] = DB_ERROR_CONSTRAINT_NOT_NULL;
	$this->errorcode_map[1062] = DB_ERROR_CONSTRAINT;
	} else {
	// Doing this in case mode changes during runtime.
	$this->errorcode_map[1022] = DB_ERROR_ALREADY_EXISTS;
	$this->errorcode_map[1048] = DB_ERROR_CONSTRAINT;
	$this->errorcode_map[1062] = DB_ERROR_ALREADY_EXISTS;
	}
	$errno = $this->errorCode(mysql_errno($this->connection));
	}
	return $this->raiseError($errno, null, null, null,
	@mysql_errno($this->connection) . ' ** ' .
	@mysql_error($this->connection));
	}

	// }}}
	// {{{ errorNative()

	/**
	* Gets the DBMS' native error code produced by the last query
	*
	* @return int the DBMS' error code
	*/
	function errorNative()
	{
	return @mysql_errno($this->connection);
	}

	// }}}
	// {{{ tableInfo()

	/**
	* Returns information about a table or a result set
	*
	* @param object\|string $result DB_result object from a query or a
	* string containing the name of a table.
	* While this also accepts a query result
	* resource identifier, this behavior is
	* deprecated.
	* @param int $mode a valid tableInfo mode
	*
	* @return array an associative array with the information requested.
	* A DB_Error object on failure.
	*
	* @see DB_common::tableInfo()
	*/
	function tableInfo($result, $mode = null)
	{
	if (is_string($result)) {
	/*
	* Probably received a table name.
	* Create a result resource identifier.
	*/
	$id = @mysql_list_fields($this->dsn['database'],
	$result, $this->connection);
	$got_string = true;
	} elseif (isset($result->result)) {
	/*
	* Probably received a result object.
	* Extract the result resource identifier.
	*/
	$id = $result->result;
	$got_string = false;
	} else {
	/*
	* Probably received a result resource identifier.
	* Copy it.
	* Deprecated. Here for compatibility only.
	*/
	$id = $result;
	$got_string = false;
	}

	if (!is_resource($id)) {
	return $this->mysqlRaiseError(DB_ERROR_NEED_MORE_DATA);
	}

	if ($this->options['portability'] & DB_PORTABILITY_LOWERCASE) {
	$case_func = 'strtolower';
	} else {
	$case_func = 'strval';
	}

	$count = @mysql_num_fields($id);
	$res = array();

	if ($mode) {
	$res['num_fields'] = $count;
	}

	for ($i = 0; $i < $count; $i++) {
	$res[$i] = array(
	'table' => $case_func(@mysql_field_table($id, $i)),
	'name' => $case_func(@mysql_field_name($id, $i)),
	'type' => @mysql_field_type($id, $i),
	'len' => @mysql_field_len($id, $i),
	'flags' => @mysql_field_flags($id, $i),
	);
	if ($mode & DB_TABLEINFO_ORDER) {
	$res['order'][$res[$i]['name']] = $i;
	}
	if ($mode & DB_TABLEINFO_ORDERTABLE) {
	$res['ordertable'][$res[$i]['table']][$res[$i]['name']] = $i;
	}
	}

	// free the result only if we were called on a table
	if ($got_string) {
	@mysql_free_result($id);
	}
	return $res;
	}

	// }}}
	// {{{ getSpecialQuery()

	/**
	* Obtains the query string needed for listing a given type of objects
	*
	* @param string $type the kind of objects you want to retrieve
	*
	* @return string the SQL query string or null if the driver doesn't
	* support the object type requested
	*
	* @access protected
	* @see DB_common::getListOf()
	*/
	function getSpecialQuery($type)
	{
	switch ($type) {
	case 'tables':
	return 'SHOW TABLES';
	case 'users':
	return 'SELECT DISTINCT User FROM mysql.user';
	case 'databases':
	return 'SHOW DATABASES';
	default:
	return null;
	}
	}

	// }}}

	}

	/*
	* Local variables:
	* tab-width: 4
	* c-basic-offset: 4
	* End:
	*/

	?>

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