Igor Babaev a6b88f1431 MDEV-415: Back-port of the WL task #1393 from the mysql-5.6 code line. ...

The task adds a more efficient handling of the queries with 
ORDER BY order LIMIT n, such that n is small enough and
no indexes are used for order.

2012-09-01 14:21:59 -07:00

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