Comment 2 for bug 693329

Here is another test case:

--source include/have_innodb.inc
SET SESSION optimizer_search_depth=4;

CREATE TABLE t1 ( f6 int) ENGINE=InnoDB;

CREATE TABLE t2 ( f1 int) ;

CREATE TABLE t3 ( f4 int) ;

CREATE TABLE t4 ( f1 int) ENGINE=InnoDB;

CREATE TABLE t5 ( f1 int) ;

CREATE TABLE t6 ( f3 int NOT NULL , PRIMARY KEY (f3)) ;

SELECT t2.f1
FROM t1
RIGHT JOIN t2 JOIN t3 ON t2.f1
RIGHT JOIN t4
LEFT JOIN t5
LEFT JOIN t6 ON t5.f1 = t6.f3 ON t4.f1 ON t3.f4 ON t1.f6 ;