- The reason the test failed was competition between 3+ QEPs with identical
costs. Before, two plans were competing, and that was addressed by using
--sorted_result on the EXPLAIN output because they were different only in
join order.
Now we've got a 3rd plan which differs with "Using where" and that doesn't
work anymore.
- This patch fixes it by removing 'Using where' from EXPLAIN output. Test coverage
is somewhat reduced but probably still ok as PBXT and nested outer join processing
have no interaction and we don't expect any bugs here.
