Re: why the two query has a different execute plan?
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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August 22, 2016 02:55AM
Re: why the two query has a different execute plan?
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