[ticket/12671] Possibility to use NOT LIKE expression

PHPBB3-12671

phpBB/phpbb/db/driver/driver_interface.php

@@ -418,6 +418,16 @@ interface driver_interface
 	*/
 	public function sql_like_expression($expression);
 
+	/**
+	* Correctly adjust NOT LIKE expression for special characters
+	* Some DBMS are handling them in a different way
+	*
+	* @param	string	$expression	The expression to use. Every wildcard is
+	*						escaped, except $this->any_char and $this->one_char
+	* @return string	A SQL statement like: "NOT LIKE 'bertie_%'"
+	*/
+	public function sql_not_like_expression($expression);
+
 	/**
 	* Explain queries
 	*