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Re: String match is too slow in huge table
Posted by: Peter Zaitsev
Date: December 31, 2004 07:38PM

You've already got "use full text search" advice which might work well for your case, I would just ecplain what is happening in this case.

The problem is you're having like "const%" on both surname and name. In such case even though you have index on (name,surname) MySQL will only be able to use prefix of the first key, as second key part only can be used if
"=" is used for first key part at this point.

First idea would be to use have (surname) index instead which is normally more sellective.

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String match is too slow in huge table
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Juan Roberto Perilla
December 23, 2004 11:37PM
Re: String match is too slow in huge table
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KimSeong Loh
December 27, 2004 11:54PM
Re: String match is too slow in huge table
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Raul Carlomagno
December 28, 2004 12:38PM
Re: String match is too slow in huge table
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Peter Zaitsev
December 31, 2004 07:38PM
Re: String match is too slow in huge table
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Juan Roberto Perilla
January 03, 2005 02:54PM
Re: String match is too slow in huge table
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Peter Zaitsev
January 03, 2005 05:08PM
Re: String match is too slow in huge table
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Juan Roberto Perilla
January 04, 2005 06:57AM
Re: String match is too slow in huge table
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Peter Zaitsev
January 04, 2005 11:05AM


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