WHERE id='a12' AND (LENGTH(code)=5 OR code < 'a00');
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ref code code 13 const 3 Using where; Using index
1 SIMPLE t2 ref PRIMARY PRIMARY 12 const 1 Using where; Using index
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 ref code code 13 const 3 100.00 Using where; Using index
1 SIMPLE t2 ref PRIMARY PRIMARY 12 const 1 100.00 Using where; Using index
Warnings:
Note 1003 select `test`.`t1`.`code` AS `code`,`test`.`t2`.`id` AS `id` from `test`.`t1` join `test`.`t2` where ((`test`.`t1`.`code` = _latin1'a12') and (`test`.`t2`.`id` = _latin1'a12') and (length(`test`.`t1`.`code`) = 5))