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<?php | |
/** | |
* | |
* This file is part of the phpBB Forum Software package. | |
* | |
* @copyright (c) phpBB Limited <https://www.phpbb.com> | |
* @license GNU General Public License, version 2 (GPL-2.0) | |
* | |
* For full copyright and license information, please see | |
* the docs/CREDITS.txt file. | |
* | |
*/ | |
namespace phpbb\db\driver; | |
/** | |
* Unified ODBC functions | |
* Unified ODBC functions support any database having ODBC driver, for example Adabas D, IBM DB2, iODBC, Solid, Sybase SQL Anywhere... | |
* Here we only support MSSQL Server 2000+ because of the provided schema | |
* | |
* @note number of bytes returned for returning data depends on odbc.defaultlrl php.ini setting. | |
* If it is limited to 4K for example only 4K of data is returned max, resulting in incomplete theme data for example. | |
* @note odbc.defaultbinmode may affect UTF8 characters | |
*/ | |
class mssql_odbc extends \phpbb\db\driver\mssql_base | |
{ | |
var $last_query_text = ''; | |
var $connect_error = ''; | |
/** | |
* {@inheritDoc} | |
*/ | |
function sql_connect($sqlserver, $sqluser, $sqlpassword, $database, $port = false, $persistency = false, $new_link = false) | |
{ | |
$this->persistency = $persistency; | |
$this->user = $sqluser; | |
$this->dbname = $database; | |
$port_delimiter = (defined('PHP_OS') && substr(PHP_OS, 0, 3) === 'WIN') ? ',' : ':'; | |
$this->server = $sqlserver . (($port) ? $port_delimiter . $port : ''); | |
$max_size = @ini_get('odbc.defaultlrl'); | |
if (!empty($max_size)) | |
{ | |
$unit = strtolower(substr($max_size, -1, 1)); | |
$max_size = (int) $max_size; | |
if ($unit == 'k') | |
{ | |
$max_size = floor($max_size / 1024); | |
} | |
else if ($unit == 'g') | |
{ | |
$max_size *= 1024; | |
} | |
else if (is_numeric($unit)) | |
{ | |
$max_size = floor((int) ($max_size . $unit) / 1048576); | |
} | |
$max_size = max(8, $max_size) . 'M'; | |
@ini_set('odbc.defaultlrl', $max_size); | |
} | |
if ($this->persistency) | |
{ | |
if (!function_exists('odbc_pconnect')) | |
{ | |
$this->connect_error = 'odbc_pconnect function does not exist, is odbc extension installed?'; | |
return $this->sql_error(''); | |
} | |
$this->db_connect_id = @odbc_pconnect($this->server, $this->user, $sqlpassword); | |
} | |
else | |
{ | |
if (!function_exists('odbc_connect')) | |
{ | |
$this->connect_error = 'odbc_connect function does not exist, is odbc extension installed?'; | |
return $this->sql_error(''); | |
} | |
$this->db_connect_id = @odbc_connect($this->server, $this->user, $sqlpassword); | |
} | |
return ($this->db_connect_id) ? $this->db_connect_id : $this->sql_error(''); | |
} | |
/** | |
* {@inheritDoc} | |
*/ | |
function sql_server_info($raw = false, $use_cache = true) | |
{ | |
global $cache; | |
if (!$use_cache || empty($cache) || ($this->sql_server_version = $cache->get('mssqlodbc_version')) === false) | |
{ | |
$result_id = @odbc_exec($this->db_connect_id, "SELECT SERVERPROPERTY('productversion'), SERVERPROPERTY('productlevel'), SERVERPROPERTY('edition')"); | |
$row = false; | |
if ($result_id) | |
{ | |
$row = odbc_fetch_array($result_id); | |
odbc_free_result($result_id); | |
} | |
$this->sql_server_version = ($row) ? trim(implode(' ', $row)) : 0; | |
if (!empty($cache) && $use_cache) | |
{ | |
$cache->put('mssqlodbc_version', $this->sql_server_version); | |
} | |
} | |
if ($raw) | |
{ | |
return $this->sql_server_version; | |
} | |
return ($this->sql_server_version) ? 'MSSQL (ODBC)<br />' . $this->sql_server_version : 'MSSQL (ODBC)'; | |
} | |
/** | |
* SQL Transaction | |
* @access private | |
*/ | |
function _sql_transaction($status = 'begin') | |
{ | |
switch ($status) | |
{ | |
case 'begin': | |
return @odbc_exec($this->db_connect_id, 'BEGIN TRANSACTION'); | |
break; | |
case 'commit': | |
return @odbc_exec($this->db_connect_id, 'COMMIT TRANSACTION'); | |
break; | |
case 'rollback': | |
return @odbc_exec($this->db_connect_id, 'ROLLBACK TRANSACTION'); | |
break; | |
} | |
return true; | |
} | |
/** | |
* {@inheritDoc} | |
*/ | |
function sql_query($query = '', $cache_ttl = 0) | |
{ | |
if ($query != '') | |
{ | |
global $cache; | |
// EXPLAIN only in extra debug mode | |
if (defined('DEBUG')) | |
{ | |
$this->sql_report('start', $query); | |
} | |
else if (defined('PHPBB_DISPLAY_LOAD_TIME')) | |
{ | |
$this->curtime = microtime(true); | |
} | |
$this->last_query_text = $query; | |
$this->query_result = ($cache && $cache_ttl) ? $cache->sql_load($query) : false; | |
$this->sql_add_num_queries($this->query_result); | |
if ($this->query_result === false) | |
{ | |
if (($this->query_result = @odbc_exec($this->db_connect_id, $query)) === false) | |
{ | |
$this->sql_error($query); | |
} | |
if (defined('DEBUG')) | |
{ | |
$this->sql_report('stop', $query); | |
} | |
else if (defined('PHPBB_DISPLAY_LOAD_TIME')) | |
{ | |
$this->sql_time += microtime(true) - $this->curtime; | |
} | |
if (!$this->query_result) | |
{ | |
return false; | |
} | |
if ($cache && $cache_ttl) | |
{ | |
$this->open_queries[(int) $this->query_result] = $this->query_result; | |
$this->query_result = $cache->sql_save($this, $query, $this->query_result, $cache_ttl); | |
} | |
else if (strpos($query, 'SELECT') === 0) | |
{ | |
$this->open_queries[(int) $this->query_result] = $this->query_result; | |
} | |
} | |
else if (defined('DEBUG')) | |
{ | |
$this->sql_report('fromcache', $query); | |
} | |
} | |
else | |
{ | |
return false; | |
} | |
return $this->query_result; | |
} | |
/** | |
* Build LIMIT query | |
*/ | |
function _sql_query_limit($query, $total, $offset = 0, $cache_ttl = 0) | |
{ | |
$this->query_result = false; | |
// Since TOP is only returning a set number of rows we won't need it if total is set to 0 (return all rows) | |
if ($total) | |
{ | |
// We need to grab the total number of rows + the offset number of rows to get the correct result | |
if (strpos($query, 'SELECT DISTINCT') === 0) | |
{ | |
$query = 'SELECT DISTINCT TOP ' . ($total + $offset) . ' ' . substr($query, 15); | |
} | |
else | |
{ | |
$query = 'SELECT TOP ' . ($total + $offset) . ' ' . substr($query, 6); | |
} | |
} | |
$result = $this->sql_query($query, $cache_ttl); | |
// Seek by $offset rows | |
if ($offset) | |
{ | |
$this->sql_rowseek($offset, $result); | |
} | |
return $result; | |
} | |
/** | |
* {@inheritDoc} | |
*/ | |
function sql_affectedrows() | |
{ | |
return ($this->db_connect_id) ? @odbc_num_rows($this->query_result) : false; | |
} | |
/** | |
* {@inheritDoc} | |
*/ | |
function sql_fetchrow($query_id = false) | |
{ | |
global $cache; | |
if ($query_id === false) | |
{ | |
$query_id = $this->query_result; | |
} | |
if ($cache && $cache->sql_exists($query_id)) | |
{ | |
return $cache->sql_fetchrow($query_id); | |
} | |
return ($query_id) ? odbc_fetch_array($query_id) : false; | |
} | |
/** | |
* {@inheritDoc} | |
*/ | |
function sql_nextid() | |
{ | |
$result_id = @odbc_exec($this->db_connect_id, 'SELECT @@IDENTITY'); | |
if ($result_id) | |
{ | |
if (odbc_fetch_array($result_id)) | |
{ | |
$id = odbc_result($result_id, 1); | |
odbc_free_result($result_id); | |
return $id; | |
} | |
odbc_free_result($result_id); | |
} | |
return false; | |
} | |
/** | |
* {@inheritDoc} | |
*/ | |
function sql_freeresult($query_id = false) | |
{ | |
global $cache; | |
if ($query_id === false) | |
{ | |
$query_id = $this->query_result; | |
} | |
if ($cache && !is_object($query_id) && $cache->sql_exists($query_id)) | |
{ | |
return $cache->sql_freeresult($query_id); | |
} | |
if (isset($this->open_queries[(int) $query_id])) | |
{ | |
unset($this->open_queries[(int) $query_id]); | |
return odbc_free_result($query_id); | |
} | |
return false; | |
} | |
/** | |
* return sql error array | |
* @access private | |
*/ | |
function _sql_error() | |
{ | |
if (function_exists('odbc_errormsg')) | |
{ | |
$error = array( | |
'message' => @odbc_errormsg(), | |
'code' => @odbc_error(), | |
); | |
} | |
else | |
{ | |
$error = array( | |
'message' => $this->connect_error, | |
'code' => '', | |
); | |
} | |
return $error; | |
} | |
/** | |
* Close sql connection | |
* @access private | |
*/ | |
function _sql_close() | |
{ | |
return @odbc_close($this->db_connect_id); | |
} | |
/** | |
* Build db-specific report | |
* @access private | |
*/ | |
function _sql_report($mode, $query = '') | |
{ | |
switch ($mode) | |
{ | |
case 'start': | |
break; | |
case 'fromcache': | |
$endtime = explode(' ', microtime()); | |
$endtime = $endtime[0] + $endtime[1]; | |
$result = @odbc_exec($this->db_connect_id, $query); | |
if ($result) | |
{ | |
while ($void = odbc_fetch_array($result)) | |
{ | |
// Take the time spent on parsing rows into account | |
} | |
odbc_free_result($result); | |
} | |
$splittime = explode(' ', microtime()); | |
$splittime = $splittime[0] + $splittime[1]; | |
$this->sql_report('record_fromcache', $query, $endtime, $splittime); | |
break; | |
} | |
} | |
} |