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Re: Query Optimizer Problem - OrderBy - 5.0.51 to 5.5.27
Posted by: Øystein Grøvlen
Date: September 06, 2012 04:32AM

Hi,

It is not obvious that retrieving all rows of a table through an index is faster than a table scan + filesort. I think that will depend on the size of the table
and whether data is in memory or on disk.

Øystein Grøvlen,
Senior Principal Software Engineer,
MySQL Group, Oracle,
Trondheim, Norway

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