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Re: Optimizations on ORDER BY with partitions
Posted by: Mikael Ronström
Date: March 21, 2006 04:22PM

James Porter wrote:
> If I were to use horizontal partitioning on a
> table and had a catch all for the top and bottom
> end, would an ORDER BY DESC and/or an ORDER BY ASC
> be optimized so that only the catch all partition
> is used until the LIMIT statement is filled?
>

No special optimisation of ORDER BY DESC/ASC currently. Also
there is currently no catch all partitions. However an interesting
idea to take into account.

> At either rate, can't wait to test partitioning
> out!

Great.

Rgrds Mikael

Mikael Ronstrom
Senior Software Architect, MySQL AB
My blog: http://mikaelronstrom.blogspot.com

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