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|
<?php
/**
*
* @package dbal
* @version $Id$
* @copyright (c) 2005 phpBB Group
* @license http://opensource.org/licenses/gpl-license.php GNU Public License
*
*/
/**
* @ignore
*/
if (!defined('IN_PHPBB'))
{
exit;
}
include_once(PHPBB_ROOT_PATH . 'includes/db/dbal.' . PHP_EXT);
/**
* MySQL Database Abstraction Layer
* Compatible with:
* MySQL 4.1+
* MySQL 5.0+
* @package dbal
*/
class dbal_mysql extends dbal
{
var $multi_insert = true;
// Supports multiple table deletion
var $multi_table_deletion = true;
var $dbms_type = 'mysql';
/**
* Connect to server
* @access public
*/
function sql_connect($sqlserver, $sqluser, $sqlpassword, $database, $port = false, $persistency = false, $new_link = false)
{
$this->persistency = $persistency;
$this->user = $sqluser;
$this->server = $sqlserver . (($port) ? ':' . $port : '');
$this->dbname = $database;
$this->db_connect_id = ($this->persistency) ? @mysql_pconnect($this->server, $this->user, $sqlpassword, $new_link) : @mysql_connect($this->server, $this->user, $sqlpassword, $new_link);
if ($this->db_connect_id && $this->dbname != '')
{
if (@mysql_select_db($this->dbname, $this->db_connect_id))
{
@mysql_query("SET NAMES 'utf8'", $this->db_connect_id);
// enforce strict mode on databases that support it
if (version_compare(mysql_get_server_info($this->db_connect_id), '5.0.2', '>='))
{
$result = @mysql_query('SELECT @@session.sql_mode AS sql_mode', $this->db_connect_id);
$row = @mysql_fetch_assoc($result);
@mysql_free_result($result);
$modes = array_map('trim', explode(',', $row['sql_mode']));
// TRADITIONAL includes STRICT_ALL_TABLES and STRICT_TRANS_TABLES
if (!in_array('TRADITIONAL', $modes))
{
if (!in_array('STRICT_ALL_TABLES', $modes))
{
$modes[] = 'STRICT_ALL_TABLES';
}
if (!in_array('STRICT_TRANS_TABLES', $modes))
{
$modes[] = 'STRICT_TRANS_TABLES';
}
}
$mode = implode(',', $modes);
@mysql_query("SET SESSION sql_mode='{$mode}'", $this->db_connect_id);
}
return $this->db_connect_id;
}
}
return $this->sql_error('');
}
/**
* Version information about used database
*/
function sql_server_info()
{
return 'MySQL ' . mysql_get_server_info($this->db_connect_id);
}
/**
* SQL Transaction
* @access private
*/
function _sql_transaction($status = 'begin')
{
switch ($status)
{
case 'begin':
return @mysql_query('BEGIN', $this->db_connect_id);
break;
case 'commit':
return @mysql_query('COMMIT', $this->db_connect_id);
break;
case 'rollback':
return @mysql_query('ROLLBACK', $this->db_connect_id);
break;
}
return true;
}
/**
* Base query method
*
* @param string $query Contains the SQL query which shall be executed
* @param int $cache_ttl Either 0 to avoid caching or the time in seconds which the result shall be kept in cache
* @return mixed When casted to bool the returned value returns true on success and false on failure
*
* @access public
*/
function sql_query($query = '', $cache_ttl = 0)
{
if ($query != '')
{
global $cache;
// EXPLAIN only in extra debug mode
if (defined('DEBUG_EXTRA'))
{
$this->sql_report('start', $query);
}
$this->query_result = ($cache_ttl && method_exists($cache, 'sql_load')) ? $cache->sql_load($query) : false;
$this->sql_add_num_queries($this->query_result);
if ($this->query_result === false)
{
if (($this->query_result = @mysql_query($query, $this->db_connect_id)) === false)
{
$this->sql_error($query);
}
if (defined('DEBUG_EXTRA'))
{
$this->sql_report('stop', $query);
}
if ($cache_ttl && method_exists($cache, 'sql_save'))
{
$this->open_queries[(int) $this->query_result] = $this->query_result;
$cache->sql_save($query, $this->query_result, $cache_ttl);
}
else if (strpos($query, 'SELECT') === 0 && $this->query_result)
{
$this->open_queries[(int) $this->query_result] = $this->query_result;
}
}
else if (defined('DEBUG_EXTRA'))
{
$this->sql_report('fromcache', $query);
}
}
else
{
return false;
}
return ($this->query_result) ? $this->query_result : false;
}
/**
* Build LIMIT query
*/
function _sql_query_limit($query, $total, $offset = 0, $cache_ttl = 0)
{
$this->query_result = false;
// if $total is set to 0 we do not want to limit the number of rows
if ($total == 0)
{
// Having a value of -1 was always a bug
$total = '18446744073709551615';
}
$query .= "\n LIMIT " . ((!empty($offset)) ? $offset . ', ' . $total : $total);
return $this->sql_query($query, $cache_ttl);
}
/**
* Return number of affected rows
*/
function sql_affectedrows()
{
return ($this->db_connect_id) ? @mysql_affected_rows($this->db_connect_id) : false;
}
/**
* Fetch current row
*/
function sql_fetchrow($query_id = false)
{
global $cache;
if ($query_id === false)
{
$query_id = $this->query_result;
}
if (isset($cache->sql_rowset[$query_id]))
{
return $cache->sql_fetchrow($query_id);
}
return ($query_id !== false) ? @mysql_fetch_assoc($query_id) : false;
}
/**
* Get last inserted id after insert statement
*/
function sql_nextid()
{
return ($this->db_connect_id) ? @mysql_insert_id($this->db_connect_id) : false;
}
/**
* Free sql result
*/
function sql_freeresult($query_id = false)
{
global $cache;
if ($query_id === false)
{
$query_id = $this->query_result;
}
if (isset($cache->sql_rowset[$query_id]))
{
return $cache->sql_freeresult($query_id);
}
if (isset($this->open_queries[(int) $query_id]))
{
unset($this->open_queries[(int) $query_id]);
return @mysql_free_result($query_id);
}
return false;
}
/**
* Escape string used in sql query
*/
function sql_escape($msg)
{
if (!$this->db_connect_id)
{
return @mysql_real_escape_string($msg);
}
return @mysql_real_escape_string($msg, $this->db_connect_id);
}
/**
* Expose a DBMS specific function
*/
function sql_function($type, $col)
{
switch ($type)
{
case 'length_varchar':
case 'length_text':
return 'LENGTH(' . $col . ')';
break;
}
}
function sql_handle_data($type, $table, $data, $where = '')
{
if ($type === 'UPDATE')
{
$this->sql_query('INSERT INTO ' . $table . ' ' .
$this->sql_build_array('INSERT', $data));
}
else
{
$this->sql_query('UPDATE ' . $table . '
SET ' . $db->sql_build_array('UPDATE', $data) .
$where);
}
}
/**
* Build LIKE expression
* @access private
*/
function _sql_like_expression($expression)
{
return $expression;
}
/**
* Build db-specific query data
* @access private
*/
function _sql_custom_build($stage, $data)
{
switch ($stage)
{
case 'FROM':
$data = '(' . $data . ')';
break;
}
return $data;
}
/**
* return sql error array
* @access private
*/
function _sql_error()
{
if (!$this->db_connect_id)
{
return array(
'message' => @mysql_error(),
'code' => @mysql_errno()
);
}
return array(
'message' => @mysql_error($this->db_connect_id),
'code' => @mysql_errno($this->db_connect_id)
);
}
/**
* Close sql connection
* @access private
*/
function _sql_close()
{
return @mysql_close($this->db_connect_id);
}
/**
* Build db-specific report
* @access private
*/
function _sql_report($mode, $query = '')
{
static $test_prof;
static $test_extend;
// current detection method, might just switch to see the existance of INFORMATION_SCHEMA.PROFILING
if ($test_prof === null)
{
$test_prof = $test_extend = false;
if (strpos($this->mysql_version, 'community') !== false)
{
$ver = substr($this->mysql_version, 0, strpos($this->mysql_version, '-'));
if (version_compare($ver, '5.0.37', '>=') && version_compare($ver, '5.1', '<'))
{
$test_prof = true;
}
}
if (version_compare($ver, '4.1.1', '>='))
{
$test_extend = true;
}
}
switch ($mode)
{
case 'start':
$explain_query = $query;
if (preg_match('/UPDATE ([a-z0-9_]+).*?WHERE(.*)/s', $query, $m))
{
$explain_query = 'SELECT * FROM ' . $m[1] . ' WHERE ' . $m[2];
}
else if (preg_match('/DELETE FROM ([a-z0-9_]+).*?WHERE(.*)/s', $query, $m))
{
$explain_query = 'SELECT * FROM ' . $m[1] . ' WHERE ' . $m[2];
}
if (preg_match('/^SELECT/', $explain_query))
{
$html_table = false;
// begin profiling
if ($test_prof)
{
@mysql_query('SET profiling = 1;', $this->db_connect_id);
}
if ($result = @mysql_query('EXPLAIN ' . (($test_extend) ? 'EXTENDED ' : '') . "$explain_query", $this->db_connect_id))
{
while ($row = @mysql_fetch_assoc($result))
{
$html_table = $this->sql_report('add_select_row', $query, $html_table, $row);
}
}
@mysql_free_result($result);
if ($html_table)
{
$this->html_hold .= '</table>';
}
if ($test_extend)
{
$html_table = false;
if ($result = @mysql_query('SHOW WARNINGS', $this->db_connect_id))
{
$this->html_hold .= '<br />';
while ($row = @mysql_fetch_assoc($result))
{
$html_table = $this->sql_report('add_select_row', $query, $html_table, $row);
}
}
@mysql_free_result($result);
if ($html_table)
{
$this->html_hold .= '</table>';
}
}
if ($test_prof)
{
$html_table = false;
// get the last profile
if ($result = @mysql_query('SHOW PROFILE ALL;', $this->db_connect_id))
{
$this->html_hold .= '<br />';
while ($row = @mysql_fetch_assoc($result))
{
// make <unknown> HTML safe
if (!empty($row['Source_function']))
{
$row['Source_function'] = str_replace(array('<', '>'), array('<', '>'), $row['Source_function']);
}
// remove unsupported features
foreach ($row as $key => $val)
{
if ($val === null)
{
unset($row[$key]);
}
}
$html_table = $this->sql_report('add_select_row', $query, $html_table, $row);
}
}
@mysql_free_result($result);
if ($html_table)
{
$this->html_hold .= '</table>';
}
@mysql_query('SET profiling = 0;', $this->db_connect_id);
}
}
break;
case 'fromcache':
$endtime = explode(' ', microtime());
$endtime = $endtime[0] + $endtime[1];
$result = @mysql_query($query, $this->db_connect_id);
while ($void = @mysql_fetch_assoc($result))
{
// Take the time spent on parsing rows into account
}
@mysql_free_result($result);
$splittime = explode(' ', microtime());
$splittime = $splittime[0] + $splittime[1];
$this->sql_report('record_fromcache', $query, $endtime, $splittime);
break;
}
}
}
?>
|
