-<?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.' . $phpEx);

-

-/**

-* MSSQL Database Abstraction Layer

-* Minimum Requirement is MSSQL 2000+

-* @package dbal

-*/

-class dbal_mssql extends dbal

-{

- var $connect_error = '';

-

- /**

- * Connect to server

- */

- function sql_connect($sqlserver, $sqluser, $sqlpassword, $database, $port = false, $persistency = false, $new_link = false)

- {

- if (!function_exists('mssql_connect'))

- {

- $this->connect_error = 'mssql_connect function does not exist, is mssql extension installed?';

- return $this->sql_error('');

- }

-

- $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 : '');

-

- @ini_set('mssql.charset', 'UTF-8');

- @ini_set('mssql.textlimit', 2147483647);

- @ini_set('mssql.textsize', 2147483647);

-

- if (version_compare(PHP_VERSION, '5.1.0', '>=') || (version_compare(PHP_VERSION, '5.0.0-dev', '<=') && version_compare(PHP_VERSION, '4.4.1', '>=')))

- {

- $this->db_connect_id = ($this->persistency) ? @mssql_pconnect($this->server, $this->user, $sqlpassword, $new_link) : @mssql_connect($this->server, $this->user, $sqlpassword, $new_link);

- }

- else

- {

- $this->db_connect_id = ($this->persistency) ? @mssql_pconnect($this->server, $this->user, $sqlpassword) : @mssql_connect($this->server, $this->user, $sqlpassword);

- }

-

- if ($this->db_connect_id && $this->dbname != '')

- {

- if (!@mssql_select_db($this->dbname, $this->db_connect_id))

- {

- @mssql_close($this->db_connect_id);

- return false;

- }

- }

-

- return ($this->db_connect_id) ? $this->db_connect_id : $this->sql_error('');

- }

-

- /**

- * Version information about used database

- * @param bool $raw if true, only return the fetched sql_server_version

- * @param bool $use_cache If true, it is safe to retrieve the value from the cache

- * @return string sql server version

- */

- 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)

- {

- $result_id = @mssql_query("SELECT SERVERPROPERTY('productversion'), SERVERPROPERTY('productlevel'), SERVERPROPERTY('edition')", $this->db_connect_id);

-

- $row = false;

- if ($result_id)

- {

- $row = @mssql_fetch_assoc($result_id);

- @mssql_free_result($result_id);

- }

-

- $this->sql_server_version = ($row) ? trim(implode(' ', $row)) : 0;

-

- 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';

- }

-

- /**

- * SQL Transaction

- * @access private

- */

- function _sql_transaction($status = 'begin')

- {

- switch ($status)

- {

- case 'begin':

- return @mssql_query('BEGIN TRANSACTION', $this->db_connect_id);

- break;

-

- case 'commit':

- return @mssql_query('COMMIT TRANSACTION', $this->db_connect_id);

- break;

-

- case 'rollback':

- return @mssql_query('ROLLBACK TRANSACTION', $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 (($this->query_result = @mssql_query($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;

- }

-

- /**

- * 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;

- }

-

- /**

- * Return number of affected rows

- */

- function sql_affectedrows()

- {

- return ($this->db_connect_id) ? @mssql_rows_affected($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);

- }

-

- if ($query_id === false)

- {

- return false;

- }

-

- $row = @mssql_fetch_assoc($query_id);

-

- // I hope i am able to remove this later... hopefully only a PHP or MSSQL bug

- if ($row)

- {

- foreach ($row as $key => $value)

- {

- $row[$key] = ($value === ' ' || $value === NULL) ? '' : $value;

- }

- }

-

- return $row;

- }

-

- /**

- * Seek to given row number

- * rownum is zero-based

- */

- function sql_rowseek($rownum, &$query_id)

- {

- global $cache;

-

- if ($query_id === false)

- {

- $query_id = $this->query_result;

- }

-

- if (isset($cache->sql_rowset[$query_id]))

- {

- return $cache->sql_rowseek($rownum, $query_id);

- }

-

- return ($query_id !== false) ? @mssql_data_seek($query_id, $rownum) : false;

- }

-

- /**

- * Get last inserted id after insert statement

- */

- function sql_nextid()

- {

- $result_id = @mssql_query('SELECT SCOPE_IDENTITY()', $this->db_connect_id);

- if ($result_id)

- {

- if ($row = @mssql_fetch_assoc($result_id))

- {

- @mssql_free_result($result_id);

- return $row['computed'];

- }

- @mssql_free_result($result_id);

- }

-

- return 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($this->open_queries[$query_id]))

- {

- unset($this->open_queries[$query_id]);

- return @mssql_free_result($query_id);

- }

-

- return false;

- }

-

- /**

- * Escape string used in sql query

- */

- function sql_escape($msg)

- {

- return str_replace(array("'", "\0"), array("''", ''), $msg);

- }

-

- /**

- * {@inheritDoc}

- */

- function sql_lower_text($column_name)

- {

- return "LOWER(SUBSTRING($column_name, 1, DATALENGTH($column_name)))";

- }

-

- /**

- * Build LIKE expression

- * @access private

- */

- function _sql_like_expression($expression)

- {

- return $expression . " ESCAPE '\\'";

- }

-

- /**

- * return sql error array

- * @access private

- */

- function _sql_error()

- {

- if (function_exists('mssql_get_last_message'))

- {

- $error = array(

- 'message' => @mssql_get_last_message(),

- 'code' => '',

- );

-

- // Get error code number

- $result_id = @mssql_query('SELECT @@ERROR as code', $this->db_connect_id);

- if ($result_id)

- {

- $row = @mssql_fetch_assoc($result_id);

- $error['code'] = $row['code'];

- @mssql_free_result($result_id);

- }

-

- // Get full error message if possible

- $sql = 'SELECT CAST(description as varchar(255)) as message

- FROM master.dbo.sysmessages

- WHERE error = ' . $error['code'];

- $result_id = @mssql_query($sql);

-

- if ($result_id)

- {

- $row = @mssql_fetch_assoc($result_id);

- if (!empty($row['message']))

- {

- $error['message'] .= '<br />' . $row['message'];

- }

- @mssql_free_result($result_id);

- }

- }

- else

- {

- $error = array(

- 'message' => $this->connect_error,

- 'code' => '',

- );

- }

-

- return $error;

- }

-

- /**

- * Build db-specific query data

- * @access private

- */

- function _sql_custom_build($stage, $data)

- {

- return $data;

- }

-

- /**

- * Close sql connection

- * @access private

- */

- function _sql_close()

- {

- return @mssql_close($this->db_connect_id);

- }

-

- /**

- * Build db-specific report

- * @access private

- */

- function _sql_report($mode, $query = '')

- {

- switch ($mode)

- {

- case 'start':

- $html_table = false;

- @mssql_query('SET SHOWPLAN_TEXT ON;', $this->db_connect_id);

- if ($result = @mssql_query($query, $this->db_connect_id))

- {

- @mssql_next_result($result);

- while ($row = @mssql_fetch_row($result))

- {

- $html_table = $this->sql_report('add_select_row', $query, $html_table, $row);

- }

- }

- @mssql_query('SET SHOWPLAN_TEXT OFF;', $this->db_connect_id);

- @mssql_free_result($result);

-

- if ($html_table)

- {

- $this->html_hold .= '</table>';

- }

- break;

-

- case 'fromcache':

- $endtime = explode(' ', microtime());

- $endtime = $endtime[0] + $endtime[1];

-

- $result = @mssql_query($query, $this->db_connect_id);

- while ($void = @mssql_fetch_assoc($result))

- {

- // Take the time spent on parsing rows into account

- }

- @mssql_free_result($result);

-

- $splittime = explode(' ', microtime());

- $splittime = $splittime[0] + $splittime[1];

-

- $this->sql_report('record_fromcache', $query, $endtime, $splittime);

-

- break;

- }

- }

-}

-

-?> \ No newline at end of file