<?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.
*
*/
/**
* This is the MS SQL Server Native database abstraction layer.
* PHP mssql native driver required.
* @author Chris Pucci
*
*/
namespace phpbb\db\driver;
class mssqlnative extends \phpbb\db\driver\mssql_base
{
var $m_insert_id = null;
var $last_query_text = '';
var $query_options = array();
var $connect_error = '';
/**
* {@inheritDoc}
*/
function sql_connect($sqlserver, $sqluser, $sqlpassword, $database, $port = false, $persistency = false, $new_link = false)
{
// Test for driver support, to avoid suppressed fatal error
if (!function_exists('sqlsrv_connect'))
{
$this->connect_error = 'Native MS SQL Server driver for PHP is missing or needs to be updated. Version 1.1 or later is required to install phpBB3. You can download the driver from: http://www.microsoft.com/sqlserver/2005/en/us/PHP-Driver.aspx';
return $this->sql_error('');
}
//set up connection variables
$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 : '');
//connect to database
$this->db_connect_id = sqlsrv_connect($this->server, array(
'Database' => $this->dbname,
'UID' => $this->user,
'PWD' => $sqlpassword,
'CharacterSet' => 'UTF-8'
));
return ($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('mssql_version')) === false)
{
$arr_server_info = sqlsrv_server_info($this->db_connect_id);
$this->sql_server_version = $arr_server_info['SQLServerVersion'];
if (!empty($cache) && $use_cache)
{
$cache->put('mssql_version', $this->sql_server_version);
}
}
if ($raw)
{
return $this->sql_server_version;
}
return ($this->sql_server_version) ? 'MSSQL<br />' . $this->sql_server_version : 'MSSQL';
}
/**
* {@inheritDoc}
*/
function sql_buffer_nested_transactions()
{
return true;
}
/**
* SQL Transaction
* @access private
*/
function _sql_transaction($status = 'begin')
{
switch ($status)
{
case 'begin':
return sqlsrv_begin_transaction($this->db_connect_id);
break;
case 'commit':
return sqlsrv_commit($this->db_connect_id);
break;
case 'rollback':
return sqlsrv_rollback($this->db_connect_id);
break;
}
return true;
}
/**
* {@inheritDoc}
*/
function sql_query($query = '', $cache_ttl = 0)
{
if ($query != '')
{
global $cache;
if ($this->debug_sql_explain)
{
$this->sql_report('start', $query);
}
else if ($this->debug_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 = @sqlsrv_query($this->db_connect_id, $query, array(), $this->query_options)) === false)
{
$this->sql_error($query);
}
// reset options for next query
$this->query_options = array();
if ($this->debug_sql_explain)
{
$this->sql_report('stop', $query);
}
else if ($this->debug_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] = $this->query_result;
}
}
else if ($this->debug_sql_explain)
{
$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)
{
$this->query_result = false;
// total == 0 means all results - not zero results
if ($offset == 0 && $total !== 0)
{
if (strpos($query, "SELECT") === false)
{
$query = "TOP {$total} " . $query;
}
else
{
$query = preg_replace('/SELECT(\s*DISTINCT)?/Dsi', 'SELECT$1 TOP '.$total, $query);
}
}
else if ($offset > 0)
{
$query = preg_replace('/SELECT(\s*DISTINCT)?/Dsi', 'SELECT$1 TOP(10000000) ', $query);
$query = 'SELECT *
FROM (SELECT sub2.*, ROW_NUMBER() OVER(ORDER BY sub2.line2) AS line3
FROM (SELECT 1 AS line2, sub1.* FROM (' . $query . ') AS sub1) as sub2) AS sub3';
if ($total > 0)
{
$query .= ' WHERE line3 BETWEEN ' . ($offset+1) . ' AND ' . ($offset + $total);
}
else
{
$query .= ' WHERE line3 > ' . $offset;
}
}
$result = $this->sql_query($query, $cache_ttl);
return $result;
}
/**
* {@inheritDoc}
*/
function sql_affectedrows()
{
return ($this->db_connect_id) ? @sqlsrv_rows_affected($this->query_result) : false;
}
/**
* {@inheritDoc}
*/
function sql_fetchrow($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);
}
if (!$query_id)
{
return false;
}
$row = sqlsrv_fetch_array($query_id, SQLSRV_FETCH_ASSOC);
if ($row)
{
foreach ($row as $key => $value)
{
$row[$key] = ($value === ' ' || $value === null) ? '' : $value;
}
// remove helper values from LIMIT queries
if (isset($row['line2']))
{
unset($row['line2'], $row['line3']);
}
}
return ($row !== null) ? $row : false;
}
/**
* {@inheritDoc}
*/
function sql_nextid()
{
$result_id = @sqlsrv_query($this->db_connect_id, 'SELECT @@IDENTITY');
if ($result_id)
{
$row = sqlsrv_fetch_array($result_id);
$id = $row[0];
sqlsrv_free_stmt($result_id);
return $id;
}
else
{
return false;
}
}
/**
* {@inheritDoc}
*/
function sql_freeresult($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) $query_id]);
return sqlsrv_free_stmt($query_id);
}
return false;
}
/**
* return sql error array
* @access private
*/
function _sql_error()
{
if (function_exists('sqlsrv_errors'))
{
$errors = @sqlsrv_errors(SQLSRV_ERR_ERRORS);
$error_message = '';
$code = 0;
if ($errors != null)
{
foreach ($errors as $error)
{
$error_message .= "SQLSTATE: " . $error['SQLSTATE'] . "\n";
$error_message .= "code: " . $error['code'] . "\n";
$code = $error['code'];
$error_message .= "message: " . $error['message'] . "\n";
}
$this->last_error_result = $error_message;
$error = $this->last_error_result;
}
else
{
$error = (isset($this->last_error_result) && $this->last_error_result) ? $this->last_error_result : array();
}
$error = array(
'message' => $error,
'code' => $code,
);
}
else
{
$error = array(
'message' => $this->connect_error,
'code' => '',
);
}
return $error;
}
/**
* Close sql connection
* @access private
*/
function _sql_close()
{
return @sqlsrv_close($this->db_connect_id);
}
/**
* Build db-specific report
* @access private
*/
function _sql_report($mode, $query = '')
{
switch ($mode)
{
case 'start':
$html_table = false;
@sqlsrv_query($this->db_connect_id, 'SET SHOWPLAN_TEXT ON;');
if ($result = @sqlsrv_query($this->db_connect_id, $query))
{
sqlsrv_next_result($result);
while ($row = sqlsrv_fetch_array($result))
{
$html_table = $this->sql_report('add_select_row', $query, $html_table, $row);
}
sqlsrv_free_stmt($result);
}
@sqlsrv_query($this->db_connect_id, 'SET SHOWPLAN_TEXT OFF;');
if ($html_table)
{
$this->html_hold .= '</table>';
}
break;
case 'fromcache':
$endtime = explode(' ', microtime());
$endtime = $endtime[0] + $endtime[1];
$result = @sqlsrv_query($this->db_connect_id, $query);
if ($result)
{
while ($void = sqlsrv_fetch_array($result))
{
// Take the time spent on parsing rows into account
}
sqlsrv_free_stmt($result);
}
$splittime = explode(' ', microtime());
$splittime = $splittime[0] + $splittime[1];
$this->sql_report('record_fromcache', $query, $endtime, $splittime);
break;
}
}
/**
* Utility method used to retrieve number of rows
* Emulates mysql_num_rows
* Used in acp_database.php -> write_data_mssqlnative()
* Requires a static or keyset cursor to be definde via
* mssqlnative_set_query_options()
*/
function mssqlnative_num_rows($res)
{
if ($res !== false)
{
return sqlsrv_num_rows($res);
}
else
{
return false;
}
}
/**
* Allows setting mssqlnative specific query options passed to sqlsrv_query as 4th parameter.
*/
function mssqlnative_set_query_options($options)
{
$this->query_options = $options;
}
}