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* @version $Id: mssql.php,v 1.51 2007/10/12 10:04:31 acydburn Exp $
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* @copyright (c) 2005 phpBB Group
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* @license http://opensource.org/licenses/gpl-license.php GNU Public License
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if (!defined('IN_PHPBB'))
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include_once($phpbb_root_path . 'includes/db/dbal.' . $phpEx);
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* MSSQL Database Abstraction Layer
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* Minimum Requirement is MSSQL 2000+
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class dbal_mssql extends dbal
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function sql_connect($sqlserver, $sqluser, $sqlpassword, $database, $port = false, $persistency = false, $new_link = false)
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$this->persistency = $persistency;
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$this->user = $sqluser;
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$this->server = $sqlserver . (($port) ? ':' . $port : '');
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$this->dbname = $database;
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@ini_set('mssql.charset', 'UTF-8');
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@ini_set('mssql.textlimit', 2147483647);
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@ini_set('mssql.textsize', 2147483647);
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if (version_compare(PHP_VERSION, '5.1.0', '>=') || (version_compare(PHP_VERSION, '5.0.0-dev', '<=') && version_compare(PHP_VERSION, '4.4.1', '>=')))
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$this->db_connect_id = ($this->persistency) ? @mssql_pconnect($this->server, $this->user, $sqlpassword, $new_link) : @mssql_connect($this->server, $this->user, $sqlpassword, $new_link);
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$this->db_connect_id = ($this->persistency) ? @mssql_pconnect($this->server, $this->user, $sqlpassword) : @mssql_connect($this->server, $this->user, $sqlpassword);
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if ($this->db_connect_id && $this->dbname != '')
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if (!@mssql_select_db($this->dbname, $this->db_connect_id))
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@mssql_close($this->db_connect_id);
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return ($this->db_connect_id) ? $this->db_connect_id : $this->sql_error('');
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* Version information about used database
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function sql_server_info()
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$result_id = @mssql_query("SELECT SERVERPROPERTY('productversion'), SERVERPROPERTY('productlevel'), SERVERPROPERTY('edition')", $this->db_connect_id);
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$row = @mssql_fetch_assoc($result_id);
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@mssql_free_result($result_id);
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return 'MSSQL<br />' . implode(' ', $row);
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function _sql_transaction($status = 'begin')
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return @mssql_query('BEGIN TRANSACTION', $this->db_connect_id);
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return @mssql_query('COMMIT TRANSACTION', $this->db_connect_id);
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return @mssql_query('ROLLBACK TRANSACTION', $this->db_connect_id);
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* @param string $query Contains the SQL query which shall be executed
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* @param int $cache_ttl Either 0 to avoid caching or the time in seconds which the result shall be kept in cache
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* @return mixed When casted to bool the returned value returns true on success and false on failure
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function sql_query($query = '', $cache_ttl = 0)
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// EXPLAIN only in extra debug mode
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if (defined('DEBUG_EXTRA'))
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$this->sql_report('start', $query);
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$this->query_result = ($cache_ttl && method_exists($cache, 'sql_load')) ? $cache->sql_load($query) : false;
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$this->sql_add_num_queries($this->query_result);
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if ($this->query_result === false)
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if (($this->query_result = @mssql_query($query, $this->db_connect_id)) === false)
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$this->sql_error($query);
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if (defined('DEBUG_EXTRA'))
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$this->sql_report('stop', $query);
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if ($cache_ttl && method_exists($cache, 'sql_save'))
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$this->open_queries[(int) $this->query_result] = $this->query_result;
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$cache->sql_save($query, $this->query_result, $cache_ttl);
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else if (strpos($query, 'SELECT') === 0 && $this->query_result)
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$this->open_queries[(int) $this->query_result] = $this->query_result;
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else if (defined('DEBUG_EXTRA'))
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$this->sql_report('fromcache', $query);
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return ($this->query_result) ? $this->query_result : false;
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function _sql_query_limit($query, $total, $offset = 0, $cache_ttl = 0)
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$this->query_result = false;
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// Since TOP is only returning a set number of rows we won't need it if total is set to 0 (return all rows)
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// We need to grab the total number of rows + the offset number of rows to get the correct result
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if (strpos($query, 'SELECT DISTINCT') === 0)
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$query = 'SELECT DISTINCT TOP ' . ($total + $offset) . ' ' . substr($query, 15);
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$query = 'SELECT TOP ' . ($total + $offset) . ' ' . substr($query, 6);
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$result = $this->sql_query($query, $cache_ttl);
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// Seek by $offset rows
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$this->sql_rowseek($offset, $result);
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* Return number of affected rows
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function sql_affectedrows()
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return ($this->db_connect_id) ? @mssql_rows_affected($this->db_connect_id) : false;
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function sql_fetchrow($query_id = false)
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if ($query_id === false)
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$query_id = $this->query_result;
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if (isset($cache->sql_rowset[$query_id]))
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return $cache->sql_fetchrow($query_id);
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if ($query_id === false)
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$row = @mssql_fetch_assoc($query_id);
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// I hope i am able to remove this later... hopefully only a PHP or MSSQL bug
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foreach ($row as $key => $value)
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$row[$key] = ($value === ' ' || $value === NULL) ? '' : $value;
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* Seek to given row number
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* rownum is zero-based
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function sql_rowseek($rownum, &$query_id)
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if ($query_id === false)
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$query_id = $this->query_result;
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if (isset($cache->sql_rowset[$query_id]))
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return $cache->sql_rowseek($rownum, $query_id);
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return ($query_id !== false) ? @mssql_data_seek($query_id, $rownum) : false;
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* Get last inserted id after insert statement
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function sql_nextid()
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$result_id = @mssql_query('SELECT SCOPE_IDENTITY()', $this->db_connect_id);
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if ($row = @mssql_fetch_assoc($result_id))
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@mssql_free_result($result_id);
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return $row['computed'];
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@mssql_free_result($result_id);
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function sql_freeresult($query_id = false)
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if ($query_id === false)
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$query_id = $this->query_result;
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if (isset($cache->sql_rowset[$query_id]))
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return $cache->sql_freeresult($query_id);
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if (isset($this->open_queries[$query_id]))
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unset($this->open_queries[$query_id]);
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return @mssql_free_result($query_id);
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* Escape string used in sql query
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function sql_escape($msg)
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return str_replace("'", "''", $msg);
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* Build LIKE expression
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function _sql_like_expression($expression)
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return $expression . " ESCAPE '\\'";
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* return sql error array
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function _sql_error()
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'message' => @mssql_get_last_message(),
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// Get error code number
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$result_id = @mssql_query('SELECT @@ERROR as code', $this->db_connect_id);
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$row = @mssql_fetch_assoc($result_id);
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$error['code'] = $row['code'];
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@mssql_free_result($result_id);
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// Get full error message if possible
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$sql = 'SELECT CAST(description as varchar(255)) as message
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FROM master.dbo.sysmessages
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WHERE error = ' . $error['code'];
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$result_id = @mssql_query($sql);
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$row = @mssql_fetch_assoc($result_id);
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if (!empty($row['message']))
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$error['message'] .= '<br />' . $row['message'];
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@mssql_free_result($result_id);
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* Build db-specific query data
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function _sql_custom_build($stage, $data)
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* Close sql connection
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function _sql_close()
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return @mssql_close($this->db_connect_id);
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* Build db-specific report
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function _sql_report($mode, $query = '')
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@mssql_query('SET SHOWPLAN_TEXT ON;', $this->db_connect_id);
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if ($result = @mssql_query($query, $this->db_connect_id))
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@mssql_next_result($result);
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while ($row = @mssql_fetch_row($result))
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$html_table = $this->sql_report('add_select_row', $query, $html_table, $row);
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@mssql_query('SET SHOWPLAN_TEXT OFF;', $this->db_connect_id);
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@mssql_free_result($result);
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$this->html_hold .= '</table>';
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$endtime = explode(' ', microtime());
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$endtime = $endtime[0] + $endtime[1];
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$result = @mssql_query($query, $this->db_connect_id);
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while ($void = @mssql_fetch_assoc($result))
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// Take the time spent on parsing rows into account
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@mssql_free_result($result);
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$splittime = explode(' ', microtime());
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$splittime = $splittime[0] + $splittime[1];
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$this->sql_report('record_fromcache', $query, $endtime, $splittime);
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www/php/phpBB3/includes/db/mssql.php
