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Re: why the two query has a different execute plan?
Posted by: Øystein Grøvlen
Date: August 22, 2016 05:08AM

Hi,

Index is used in the first case because all columns needed from us table is part of index. In the second case, query requests columns that are not part of the index.

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

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Re: why the two query has a different execute plan?
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