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https://github.com/phpbb/phpbb.git
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386 lines
8.6 KiB
PHP
386 lines
8.6 KiB
PHP
<?php
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/**
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*
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* @package dbal
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* @copyright (c) 2005 phpBB Group
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* @license http://opensource.org/licenses/gpl-2.0.php GNU General Public License v2
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*
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*/
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namespace phpbb\db\driver;
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/**
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* @ignore
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*/
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if (!defined('IN_PHPBB'))
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{
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exit;
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}
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/**
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* Unified ODBC functions
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* Unified ODBC functions support any database having ODBC driver, for example Adabas D, IBM DB2, iODBC, Solid, Sybase SQL Anywhere...
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* Here we only support MSSQL Server 2000+ because of the provided schema
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*
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* @note number of bytes returned for returning data depends on odbc.defaultlrl php.ini setting.
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* If it is limited to 4K for example only 4K of data is returned max, resulting in incomplete theme data for example.
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* @note odbc.defaultbinmode may affect UTF8 characters
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*
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* @package dbal
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*/
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class mssql_odbc extends \phpbb\db\driver\mssql_base
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{
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var $last_query_text = '';
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var $connect_error = '';
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/**
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* Connect to server
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*/
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function sql_connect($sqlserver, $sqluser, $sqlpassword, $database, $port = false, $persistency = false, $new_link = false)
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{
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$this->persistency = $persistency;
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$this->user = $sqluser;
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$this->dbname = $database;
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$port_delimiter = (defined('PHP_OS') && substr(PHP_OS, 0, 3) === 'WIN') ? ',' : ':';
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$this->server = $sqlserver . (($port) ? $port_delimiter . $port : '');
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$max_size = @ini_get('odbc.defaultlrl');
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if (!empty($max_size))
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{
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$unit = strtolower(substr($max_size, -1, 1));
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$max_size = (int) $max_size;
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if ($unit == 'k')
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{
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$max_size = floor($max_size / 1024);
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}
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else if ($unit == 'g')
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{
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$max_size *= 1024;
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}
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else if (is_numeric($unit))
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{
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$max_size = floor((int) ($max_size . $unit) / 1048576);
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}
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$max_size = max(8, $max_size) . 'M';
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@ini_set('odbc.defaultlrl', $max_size);
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}
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if ($this->persistency)
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{
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if (!function_exists('odbc_pconnect'))
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{
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$this->connect_error = 'odbc_pconnect function does not exist, is odbc extension installed?';
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return $this->sql_error('');
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}
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$this->db_connect_id = @odbc_pconnect($this->server, $this->user, $sqlpassword);
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}
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else
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{
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if (!function_exists('odbc_connect'))
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{
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$this->connect_error = 'odbc_connect function does not exist, is odbc extension installed?';
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return $this->sql_error('');
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}
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$this->db_connect_id = @odbc_connect($this->server, $this->user, $sqlpassword);
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}
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return ($this->db_connect_id) ? $this->db_connect_id : $this->sql_error('');
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}
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/**
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* Version information about used database
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* @param bool $raw if true, only return the fetched sql_server_version
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* @param bool $use_cache If true, it is safe to retrieve the value from the cache
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* @return string sql server version
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*/
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function sql_server_info($raw = false, $use_cache = true)
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{
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global $cache;
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if (!$use_cache || empty($cache) || ($this->sql_server_version = $cache->get('mssqlodbc_version')) === false)
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{
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$result_id = @odbc_exec($this->db_connect_id, "SELECT SERVERPROPERTY('productversion'), SERVERPROPERTY('productlevel'), SERVERPROPERTY('edition')");
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$row = false;
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if ($result_id)
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{
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$row = @odbc_fetch_array($result_id);
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@odbc_free_result($result_id);
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}
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$this->sql_server_version = ($row) ? trim(implode(' ', $row)) : 0;
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if (!empty($cache) && $use_cache)
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{
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$cache->put('mssqlodbc_version', $this->sql_server_version);
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}
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}
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if ($raw)
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{
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return $this->sql_server_version;
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}
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return ($this->sql_server_version) ? 'MSSQL (ODBC)<br />' . $this->sql_server_version : 'MSSQL (ODBC)';
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}
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/**
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* SQL Transaction
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* @access private
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*/
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function _sql_transaction($status = 'begin')
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{
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switch ($status)
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{
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case 'begin':
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return @odbc_exec($this->db_connect_id, 'BEGIN TRANSACTION');
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break;
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case 'commit':
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return @odbc_exec($this->db_connect_id, 'COMMIT TRANSACTION');
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break;
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case 'rollback':
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return @odbc_exec($this->db_connect_id, 'ROLLBACK TRANSACTION');
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break;
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}
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return true;
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}
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/**
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* Base query method
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*
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* @param string $query Contains the SQL query which shall be executed
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* @param int $cache_ttl Either 0 to avoid caching or the time in seconds which the result shall be kept in cache
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* @return mixed When casted to bool the returned value returns true on success and false on failure
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*
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* @access public
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*/
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function sql_query($query = '', $cache_ttl = 0)
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{
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if ($query != '')
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{
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global $cache;
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// EXPLAIN only in extra debug mode
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if (defined('DEBUG'))
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{
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$this->sql_report('start', $query);
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}
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$this->last_query_text = $query;
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$this->query_result = ($cache && $cache_ttl) ? $cache->sql_load($query) : false;
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$this->sql_add_num_queries($this->query_result);
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if ($this->query_result === false)
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{
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if (($this->query_result = @odbc_exec($this->db_connect_id, $query)) === false)
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{
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$this->sql_error($query);
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}
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if (defined('DEBUG'))
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{
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$this->sql_report('stop', $query);
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}
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if ($cache && $cache_ttl)
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{
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$this->open_queries[(int) $this->query_result] = $this->query_result;
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$this->query_result = $cache->sql_save($this, $query, $this->query_result, $cache_ttl);
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}
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else if (strpos($query, 'SELECT') === 0 && $this->query_result)
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{
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$this->open_queries[(int) $this->query_result] = $this->query_result;
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}
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}
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else if (defined('DEBUG'))
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{
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$this->sql_report('fromcache', $query);
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}
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}
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else
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{
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return false;
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}
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return $this->query_result;
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}
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/**
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* Build LIMIT query
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*/
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function _sql_query_limit($query, $total, $offset = 0, $cache_ttl = 0)
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{
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$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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if ($total)
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{
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// We need to grab the total number of rows + the offset number of rows to get the correct result
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if (strpos($query, 'SELECT DISTINCT') === 0)
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{
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$query = 'SELECT DISTINCT TOP ' . ($total + $offset) . ' ' . substr($query, 15);
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}
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else
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{
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$query = 'SELECT TOP ' . ($total + $offset) . ' ' . substr($query, 6);
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}
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}
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$result = $this->sql_query($query, $cache_ttl);
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// Seek by $offset rows
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if ($offset)
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{
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$this->sql_rowseek($offset, $result);
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}
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return $result;
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}
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/**
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* Return number of affected rows
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*/
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function sql_affectedrows()
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{
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return ($this->db_connect_id) ? @odbc_num_rows($this->query_result) : false;
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}
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/**
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* Fetch current row
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* @note number of bytes returned depends on odbc.defaultlrl php.ini setting. If it is limited to 4K for example only 4K of data is returned max.
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*/
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function sql_fetchrow($query_id = false)
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{
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global $cache;
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if ($query_id === false)
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{
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$query_id = $this->query_result;
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}
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if ($cache && $cache->sql_exists($query_id))
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{
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return $cache->sql_fetchrow($query_id);
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}
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return ($query_id !== false) ? @odbc_fetch_array($query_id) : false;
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}
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/**
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* Get last inserted id after insert statement
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*/
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function sql_nextid()
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{
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$result_id = @odbc_exec($this->db_connect_id, 'SELECT @@IDENTITY');
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if ($result_id)
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{
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if (@odbc_fetch_array($result_id))
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{
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$id = @odbc_result($result_id, 1);
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@odbc_free_result($result_id);
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return $id;
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}
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@odbc_free_result($result_id);
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}
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return false;
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}
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/**
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* Free sql result
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*/
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function sql_freeresult($query_id = false)
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{
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global $cache;
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if ($query_id === false)
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{
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$query_id = $this->query_result;
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}
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if ($cache && $cache->sql_exists($query_id))
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{
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return $cache->sql_freeresult($query_id);
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}
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if (isset($this->open_queries[(int) $query_id]))
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{
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unset($this->open_queries[(int) $query_id]);
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return @odbc_free_result($query_id);
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}
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return false;
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}
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/**
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* return sql error array
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* @access private
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*/
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function _sql_error()
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{
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if (function_exists('odbc_errormsg'))
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{
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$error = array(
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'message' => @odbc_errormsg(),
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'code' => @odbc_error(),
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);
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}
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else
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{
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$error = array(
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'message' => $this->connect_error,
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'code' => '',
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);
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}
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return $error;
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}
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/**
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* Close sql connection
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* @access private
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*/
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function _sql_close()
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{
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return @odbc_close($this->db_connect_id);
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}
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/**
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* Build db-specific report
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* @access private
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*/
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function _sql_report($mode, $query = '')
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{
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switch ($mode)
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{
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case 'start':
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break;
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case 'fromcache':
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$endtime = explode(' ', microtime());
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$endtime = $endtime[0] + $endtime[1];
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$result = @odbc_exec($this->db_connect_id, $query);
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while ($void = @odbc_fetch_array($result))
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{
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// Take the time spent on parsing rows into account
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}
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@odbc_free_result($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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break;
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}
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}
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}
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