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EXPLAIN SELECT logic_id, since, till FROM COND_dummy WHERE logic_id = 9999 ... OR ('2005-01-01 00:00:00' >= since AND '2005-01-01 00:00:01' < till)) + LIMIT 1;
[#insert] [date time] [ins/s] 1000 2005-03-09 10:58:10 649.516 2000 2005-03-09 10:58:14 287.810 ... 8000 2005-03-09 10:59:10 74.197 9000 2005-03-09 10:59:26 64.026 10000 2005-03-09 10:59:44 54.799