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Re: Query Optimizer Problems
Posted by: Harrison Fisk
Date: October 15, 2004 02:11PM

Hi,

Is that your real query there? I don't think it would choose to use that index, due to the fact it is impossible to use it to resolve your query. You aren't use studentid in the query, yet that is the left most index part, so it would have to use it.

Can you post the full explain for the actual query in question and the table structures? Thanks.

Harrison Fisk, Trainer and Consultant
MySQL AB, www.mysql.com

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