Comment 2 for bug 611704

With prepared statements:

CREATE TABLE `CC` (
  `pk` int(11) NOT NULL AUTO_INCREMENT,
  `col_int_key` int(11) DEFAULT NULL,
  `col_varchar_key` varchar(1) DEFAULT NULL,
  `col_varchar_nokey` varchar(1) DEFAULT NULL,
  PRIMARY KEY (`pk`),
  KEY `col_int_key` (`col_int_key`),
  KEY `col_varchar_key` (`col_varchar_key`,`col_int_key`)
) ENGINE=MyISAM AUTO_INCREMENT=30 DEFAULT CHARSET=latin1;
INSERT INTO `CC` VALUES (10,8,'v','v');
INSERT INTO `CC` VALUES (11,9,'r','r');
INSERT INTO `CC` VALUES (12,9,'a','a');
INSERT INTO `CC` VALUES (13,186,'m','m');
INSERT INTO `CC` VALUES (14,NULL,'y','y');
INSERT INTO `CC` VALUES (15,2,'j','j');
INSERT INTO `CC` VALUES (16,3,'d','d');
INSERT INTO `CC` VALUES (17,0,'z','z');
INSERT INTO `CC` VALUES (18,133,'e','e');
INSERT INTO `CC` VALUES (19,1,'h','h');
INSERT INTO `CC` VALUES (20,8,'b','b');
INSERT INTO `CC` VALUES (21,5,'s','s');
INSERT INTO `CC` VALUES (22,5,'e','e');
INSERT INTO `CC` VALUES (23,8,'j','j');
INSERT INTO `CC` VALUES (24,6,'e','e');
INSERT INTO `CC` VALUES (25,51,'f','f');
INSERT INTO `CC` VALUES (26,4,'v','v');
INSERT INTO `CC` VALUES (27,7,'x','x');
INSERT INTO `CC` VALUES (28,6,'m','m');
INSERT INTO `CC` VALUES (29,4,'c','c');
CREATE TABLE `C` (
  `pk` int(11) NOT NULL AUTO_INCREMENT,
  `col_int_key` int(11) DEFAULT NULL,
  `col_varchar_key` varchar(1) DEFAULT NULL,
  `col_varchar_nokey` varchar(1) DEFAULT NULL,
  PRIMARY KEY (`pk`),
  KEY `col_int_key` (`col_int_key`),
  KEY `col_varchar_key` (`col_varchar_key`,`col_int_key`)
) ENGINE=MyISAM AUTO_INCREMENT=21 DEFAULT CHARSET=latin1;
INSERT INTO `C` VALUES (1,2,'w','w');
INSERT INTO `C` VALUES (2,9,'m','m');
INSERT INTO `C` VALUES (3,3,'m','m');
INSERT INTO `C` VALUES (4,9,'k','k');
INSERT INTO `C` VALUES (5,NULL,'r','r');
INSERT INTO `C` VALUES (6,9,'t','t');
INSERT INTO `C` VALUES (7,3,'j','j');
INSERT INTO `C` VALUES (8,8,'u','u');
INSERT INTO `C` VALUES (9,8,'h','h');
INSERT INTO `C` VALUES (10,53,'o','o');
INSERT INTO `C` VALUES (11,0,NULL,NULL);
INSERT INTO `C` VALUES (12,5,'k','k');
INSERT INTO `C` VALUES (13,166,'e','e');
INSERT INTO `C` VALUES (14,3,'n','n');
INSERT INTO `C` VALUES (15,0,'t','t');
INSERT INTO `C` VALUES (16,1,'c','c');
INSERT INTO `C` VALUES (17,9,'m','m');
INSERT INTO `C` VALUES (18,5,'y','y');
INSERT INTO `C` VALUES (19,6,'f','f');
INSERT INTO `C` VALUES (20,2,'d','d');
CREATE TABLE `BB` (
  `pk` int(11) NOT NULL AUTO_INCREMENT,
  `col_int_key` int(11) DEFAULT NULL,
  `col_varchar_key` varchar(1) DEFAULT NULL,
  `col_varchar_nokey` varchar(1) DEFAULT NULL,
  PRIMARY KEY (`pk`),
  KEY `col_int_key` (`col_int_key`),
  KEY `col_varchar_key` (`col_varchar_key`,`col_int_key`)
) ENGINE=MyISAM AUTO_INCREMENT=11 DEFAULT CHARSET=latin1;
INSERT INTO `BB` VALUES (10,8,NULL,NULL);

PREPARE st1 FROM 'SELECT table1 .`pk`
FROM CC table1
STRAIGHT_JOIN ( BB table2 STRAIGHT_JOIN C ON table2 .`col_int_key` )
ON ( table1 .`col_varchar_key` , table2 .`col_varchar_key` )
IN ( SELECT `col_varchar_nokey` , `col_varchar_key` FROM CC ) ';

EXECUTE st1;