Re: speed up query
Posted by:
Rick James
Date: April 29, 2010 09:18AM
Oops -- you may have some troubles...
id AUTO_INCREMENT...PRIMARY KEY(id, time)
does NOT make AUTO_INCREMENT work correctly -- you can get duplicate ids because there is no UNIQUE constraint on id alone.
It may be better to have no PRIMARY or UNIQUE key. For that matter, drop `id`.
There is some pseudo-bug about NULLs going into the first partition; it _may_ be advantageous to have an empty first partition (VALUES LESS THAN (0)) so that the table scan of that partition will be fast.
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Re: speed up query
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