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Re: Simple Query - but explain worries me
Posted by: Jake Day
Date: November 01, 2005 02:48AM

Been looking further into this, and i'm starting to suspect a minor bug in the "optimizing" package.

Within version 5.0

if i remove

a.race_id > 300000

and add in

a.race_id < 400000

instead, the explain shows it going to the smaller table first. But as soon as i add in the > sign, the "optimizer" wants it to go to the bigger table first.

Maybe this is a recognised difference between DB2 and MySQL, but i can't see any benefit to going to a larger table before a smaller table?


Jake Day

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Written By
November 01, 2005 01:26AM
Re: Simple Query - but explain worries me
November 01, 2005 02:48AM
November 01, 2005 05:13AM
November 01, 2005 07:37AM
November 01, 2005 08:03AM

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