Note 1003 select `test`.`t1`.`i1` AS `i1`,`test`.`t1`.`v1` AS `v1`,`test`.`t2`.`i2` AS `i2`,`test`.`t2`.`v2` AS `v2`,`test`.`t3`.`i3` AS `i3`,`test`.`t3`.`v3` AS `v3` from `test`.`t1` join `test`.`t2` join `test`.`t3` where ((`test`.`t3`.`v3` = 4) and (`test`.`t1`.`i1` = `test`.`t3`.`i3`) and (`test`.`t2`.`i2` = `test`.`t3`.`i3`))
# This should have the same join order like the query above:
EXPLAIN EXTENDED
SELECT * FROM
(SELECT t1.i1 as i1, t1.v1 as v1,
t2.i2 as i2, t2.v2 as v2,
t3.i3 as i3, t3.v3 as v3
FROM t1 JOIN t2 on t1.i1 = t2.i2
LEFT JOIN t3 on t2.i2 = t3.i3
WHERE t1.i1 = t2.i2
AND 1 = 1
) as w2
WHERE v3 = 4;
id select_type table type possible_keys key key_len ref rows filtered Extra
Note 1003 select `test`.`t1`.`i1` AS `i1`,`test`.`t1`.`v1` AS `v1`,`test`.`t2`.`i2` AS `i2`,`test`.`t2`.`v2` AS `v2`,`test`.`t3`.`i3` AS `i3`,`test`.`t3`.`v3` AS `v3` from `test`.`t1` join `test`.`t2` join `test`.`t3` where ((`test`.`t3`.`v3` = 4) and (`test`.`t1`.`i1` = `test`.`t3`.`i3`) and (`test`.`t2`.`i2` = `test`.`t3`.`i3`))