Added backticks to column names when using insert_string and update_string.  Relates to this bug report:  http://codeigniter.com/bug_tracker/bug/4509/
diff --git a/system/database/drivers/odbc/odbc_driver.php b/system/database/drivers/odbc/odbc_driver.php
index f89000d..ed8f81c 100644
--- a/system/database/drivers/odbc/odbc_driver.php
+++ b/system/database/drivers/odbc/odbc_driver.php
@@ -371,7 +371,23 @@
 	{

 		return odbc_error($this->conn_id);

 	}

-	

+	// --------------------------------------------------------------------

+

+	/**

+	 * Escape Column Name

+	 *

+	 * This function adds backticks around supplied column name

+	 *

+	 * @access	private

+	 * @param	string	the column name

+	 * @return	string

+	 */

+	function _escape_column($column)

+	{

+		// Not necessary with ODBC so we simply return the value

+		return $column;

+	}

+

 	// --------------------------------------------------------------------

 

 	/**

@@ -386,9 +402,9 @@
 	 */

 	function _escape_table($table)

 	{

-		// used to add backticks in other db drivers		

+		// Not necessary with ODBC so we simply return the value

 		return $table;

-	}

+	}	

 		

 	// --------------------------------------------------------------------