Also reproducible on MariaDB 5.3 revno 3526.
Reproducible with the default optimizer_switch as well as all OFF values (except for in_to_exists which is required to run the query or, in this case, explain).
Not reproducible on MySQL trunk revno 3782, MariaDB 5.2.
Also reproducible on MariaDB 5.3 revno 3526.
Reproducible with the default optimizer_switch as well as all OFF values (except for in_to_exists which is required to run the query or, in this case, explain).
Not reproducible on MySQL trunk revno 3782, MariaDB 5.2.