1 files changed, 377 insertions, 0 deletions
diff --git a/phpBB/phpbb/db/driver/mssql_odbc.php b/phpBB/phpbb/db/driver/mssql_odbc.php
new file mode 100644
index 0000000000..8e5d4c7a4c
--- /dev/null
+++ b/phpBB/phpbb/db/driver/mssql_odbc.php
@@ -0,0 +1,377 @@
+<?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) - $this->curtime;
+				}
+
+				if ($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->query_result)
+				{
+					$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 ($query_id !== false) ? @odbc_fetch_array($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, $query);
+				while ($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;
+		}
+	}
+}