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Re: union, where and indices
Posted by: Rick James
Date: March 13, 2010 11:46AM

Sorry. VIEW optimization in MySQL are still pretty primitive. I prefer not to use VIEWs, but instead construct the necessary SELECT myself. That way, I would naturally put the WHERE clause on each SELECT in a UNION. And also avoid the extra subquery layer.

You could go to and submit a feature request. What you supplied for this forum thread should be close to what is needed for that.

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Written By
March 12, 2010 09:21AM
Re: union, where and indices
March 13, 2010 11:46AM

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