1 files changed, 457 insertions, 0 deletions

diff --git a/system/database/drivers/mssql/mssql_driver.php b/system/database/drivers/mssql/mssql_driver.php
new file mode 100644
index 000000000..4f668f282
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+++ b/system/database/drivers/mssql/mssql_driver.php
@@ -0,0 +1,457 @@
+<?php  if (!defined('BASEPATH')) exit('No direct script access allowed');
+/**
+ * Code Igniter
+ *
+ * An open source application development framework for PHP 4.3.2 or newer
+ *
+ * @package		CodeIgniter
+ * @author		Rick Ellis
+ * @copyright	Copyright (c) 2006, pMachine, Inc.
+ * @license		http://www.codeignitor.com/user_guide/license.html 
+ * @link		http://www.codeigniter.com
+ * @since		Version 1.0
+ * @filesource
+ */
+ 
+// ------------------------------------------------------------------------
+
+/**
+ * MS SQL Database Adapter Class
+ *
+ * Note: _DB is an extender class that the app controller
+ * creates dynamically based on whether the active record
+ * class is being used or not.
+ *
+ * @package		CodeIgniter
+ * @subpackage	Drivers
+ * @category	Database
+ * @author		Rick Ellis
+ * @link		http://www.codeigniter.com/user_guide/database/
+ */
+class CI_DB_mssql_driver extends CI_DB {
+
+	/**
+	 * Non-persistent database connection
+	 *
+	 * @access	private called by the base class
+	 * @return	resource
+	 */	
+	function db_connect()
+	{
+		return mssql_connect($this->hostname, $this->username, $this->password);
+	}
+	
+	// --------------------------------------------------------------------
+
+	/**
+	 * Persistent database connection
+	 *
+	 * @access	private called by the base class
+	 * @return	resource
+	 */	
+	function db_pconnect()
+	{
+		return mssql_pconnect($this->hostname, $this->username, $this->password);
+	}
+	
+	// --------------------------------------------------------------------
+
+	/**
+	 * Select the database
+	 *
+	 * @access	private called by the base class
+	 * @return	resource
+	 */	
+	function db_select()
+	{
+		return @mssql_select_db($this->database, $this->conn_id);
+	}
+	
+	// --------------------------------------------------------------------
+
+	/**
+	 * Execute the query
+	 *
+	 * @access	private called by the base class
+	 * @param	string	an SQL query
+	 * @return	resource
+	 */	
+	function _execute($sql)
+	{
+		$sql = $this->_prep_query($sql);
+		return @mssql_query($sql, $this->conn_id);
+	}
+	
+	// --------------------------------------------------------------------
+
+	/**
+	 * Prep the query
+	 *
+	 * If needed, each database adapter can prep the query string
+	 *
+	 * @access	private called by execute()
+	 * @param	string	an SQL query
+	 * @return	string
+	 */	
+    function _prep_query($sql)
+    {
+		return $sql;
+    }
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Begin Transaction
+	 * 
+	 * @access	public
+	 * @return	bool		 
+	 */	
+	function trans_begin($test_mode = FALSE)
+	{
+		if ( ! $this->trans_enabled)
+		{
+			return TRUE;
+		}
+		
+		// When transactions are nested we only begin/commit/rollback the outermost ones
+		if ($this->_trans_depth > 0)
+		{
+			return TRUE;
+		}
+
+		// Reset the transaction failure flag.
+		// If the $test_mode flag is set to TRUE transactions will be rolled back 
+		// even if the queries produce a successful result. 
+		$this->_trans_failure = ($test_mode === TRUE) ? TRUE : FALSE;
+
+		$this->simple_query('BEGIN TRAN');
+		return TRUE;
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Commit Transaction
+	 * 
+	 * @access	public
+	 * @return	bool		 
+	 */	
+	function trans_commit()
+	{
+		if ( ! $this->trans_enabled)
+		{
+			return TRUE;
+		}
+
+		// When transactions are nested we only begin/commit/rollback the outermost ones
+		if ($this->_trans_depth > 0)
+		{
+			return TRUE;
+		}
+
+		$this->simple_query('COMMIT TRAN');
+		return TRUE;
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Rollback Transaction
+	 * 
+	 * @access	public
+	 * @return	bool		 
+	 */	
+	function trans_rollback()
+	{
+		if ( ! $this->trans_enabled)
+		{
+			return TRUE;
+		}
+
+		// When transactions are nested we only begin/commit/rollback the outermost ones
+		if ($this->_trans_depth > 0)
+		{
+			return TRUE;
+		}
+
+		$this->simple_query('ROLLBACK TRAN');
+		return TRUE;
+	}
+	
+	// --------------------------------------------------------------------
+
+	/**
+	 * Escape String
+	 *
+	 * @access	public
+	 * @param	string
+	 * @return	string
+	 */
+	function escape_str($str)	
+	{	
+		// Escape single quotes
+		return str_replace("'", "''", $str);
+	}
+	
+	// --------------------------------------------------------------------
+
+	/**
+	 * Affected Rows
+	 *
+	 * @access	public
+	 * @return	integer
+	 */
+	function affected_rows()
+	{
+		return @mssql_rows_affected($this->conn_id);
+	}
+	
+	// --------------------------------------------------------------------
+
+	/**
+	 * Insert ID
+	 *
+	 * @access	public
+	 * @return	integer
+	 */
+	function insert_id()
+	{
+		// Not supported in MS SQL?
+		return 0;
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * "Count All" query
+	 *
+	 * Generates a platform-specific query string that counts all records in
+	 * the specified database
+	 *
+	 * @access	public
+	 * @param	string
+	 * @return	string
+	 */
+	function count_all($table = '')
+	{
+		if ($table == '')
+			return '0';
+	
+		$query = $this->query("SELECT COUNT(*) AS numrows FROM `".$this->dbprefix.$table."`");
+		
+		if ($query->num_rows() == 0)
+			return '0';
+
+		$row = $query->row();
+		return $row->numrows;
+	}
+	
+	// --------------------------------------------------------------------
+
+	/**
+	 * The error message string
+	 *
+	 * @access	public
+	 * @return	string
+	 */
+	function error_message()
+	{
+		// Are errros even supported in MS SQL?
+		return '';
+	}
+	
+	// --------------------------------------------------------------------
+
+	/**
+	 * The error message number
+	 *
+	 * @access	public
+	 * @return	integer
+	 */
+	function error_number()
+	{
+		// Are error numbers supported?
+		return '';
+	}
+	
+	// --------------------------------------------------------------------
+
+	/**
+	 * Escape Table Name
+	 *
+	 * This function adds backticks if the table name has a period
+	 * in it. Some DBs will get cranky unless periods are escaped
+	 *
+	 * @access	public
+	 * @param	string	the table name
+	 * @return	string
+	 */
+	function escape_table($table)
+	{
+		if (stristr($table, '.'))
+		{
+			$table = preg_replace("/\./", "`.`", $table);
+		}
+		
+		return $table;
+	}
+	
+	// --------------------------------------------------------------------
+
+	/**
+	 * Field data query
+	 *
+	 * Generates a platform-specific query so that the column data can be retrieved
+	 *
+	 * @access	public
+	 * @param	string	the table name
+	 * @return	object
+	 */
+	function _field_data($table)
+	{
+		$sql = "SELECT TOP 1 FROM ".$this->escape_table($table);
+		$query = $this->query($sql);
+		return $query->field_data();
+	}
+	
+	// --------------------------------------------------------------------
+
+	/**
+	 * Insert statement
+	 *
+	 * Generates a platform-specific insert string from the supplied data
+	 *
+	 * @access	public
+	 * @param	string	the table name
+	 * @param	array	the insert keys
+	 * @param	array	the insert values
+	 * @return	string
+	 */
+	function _insert($table, $keys, $values)
+	{	
+		return "INSERT INTO ".$this->escape_table($table)." (".implode(', ', $keys).") VALUES (".implode(', ', $values).")";
+	}
+	
+	// --------------------------------------------------------------------
+
+	/**
+	 * Update statement
+	 *
+	 * Generates a platform-specific update string from the supplied data
+	 *
+	 * @access	public
+	 * @param	string	the table name
+	 * @param	array	the update data
+	 * @param	array	the where clause
+	 * @return	string
+	 */
+	function _update($table, $values, $where)
+	{
+		foreach($values as $key => $val)
+		{
+			$valstr[] = $key." = ".$val;
+		}
+	
+		return "UPDATE ".$this->escape_table($table)." SET ".implode(', ', $valstr)." WHERE ".implode(" ", $where);
+	}
+	
+	// --------------------------------------------------------------------
+
+	/**
+	 * Delete statement
+	 *
+	 * Generates a platform-specific delete string from the supplied data
+	 *
+	 * @access	public
+	 * @param	string	the table name
+	 * @param	array	the where clause
+	 * @return	string
+	 */	
+	function _delete($table, $where)
+	{
+		return "DELETE FROM ".$this->escape_table($table)." WHERE ".implode(" ", $where);
+	}
+	
+	// --------------------------------------------------------------------
+
+	/**
+	 * Version number query string
+	 *
+	 * @access	public
+	 * @return	string
+	 */
+	function _version()
+	{
+		return "SELECT version() AS ver";
+	}
+	
+	// --------------------------------------------------------------------
+
+	/**
+	 * Show table query
+	 *
+	 * Generates a platform-specific query string so that the table names can be fetched
+	 *
+	 * @access	public
+	 * @return	string
+	 */
+	function _show_tables()
+	{
+		return "SELECT name FROM sysobjects WHERE type = 'U' ORDER BY name";		
+	}
+	
+	// --------------------------------------------------------------------
+
+	/**
+	 * Show columnn query
+	 *
+	 * Generates a platform-specific query string so that the column names can be fetched
+	 *
+	 * @access	public
+	 * @param	string	the table name
+	 * @return	string
+	 */
+	function _show_columns($table = '')
+	{
+		return "SELECT * FROM INFORMATION_SCHEMA.Columns WHERE TABLE_NAME = '".$this->escape_table($table)."'";	
+	}
+	
+	// --------------------------------------------------------------------
+
+	/**
+	 * Limit string
+	 *
+	 * Generates a platform-specific LIMIT clause
+	 *
+	 * @access	public
+	 * @param	string	the sql query string
+	 * @param	integer	the number of rows to limit the query to
+	 * @param	integer	the offset value
+	 * @return	string
+	 */
+	function _limit($sql, $limit, $offset)
+	{
+		$i = $limit + $offset;
+	
+		return preg_replace('/(^\SELECT (DISTINCT)?)/i','\\1 TOP '.$i.' ', $sql);		
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Close DB Connection
+	 *
+	 * @access	public
+	 * @param	resource
+	 * @return	void
+	 */
+	function _close($conn_id)
+	{
+		mssql_close($conn_id);
+	}
+	
+
+}
+
+
+?>
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