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/oci8/oci8_driver.php b/system/database/drivers/oci8/oci8_driver.php
index 765c3f6..b45b003 100644
--- a/system/database/drivers/oci8/oci8_driver.php
+++ b/system/database/drivers/oci8/oci8_driver.php
@@ -506,6 +506,23 @@
 		$error = ocierror($this->conn_id);

 		return $error['code'];

 	}

+	

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

+

+	/**

+	 * Escape Column Name

+	 *

+	 * This function adds backticks around supplied column name

+	 *

+	 * @access	private

+	 * @param	string	the column name

+	 * @return	string

+	 */

+	function _escape_column($column)

+	{

+		// Probably not necessary with Oracle so we simply return the value

+		return $column;

+	}

 

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