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Re: Understanding Explain
Posted by: Øystein Grøvlen
Date: August 28, 2014 03:00PM

Hi,

Using Index means that it is only reading the jeid index of media table. That is, no look-ups into table data. This is good.

Using temporary;Using Filesort means that query result is stored in temporary table and then sorted. As long as you are ordering on columns from the right table of the outer join, there is no way to avoid this.

AFAICT, there is no better query plan. You might speed up the sorting a bit by increasing the sort buffer, but that is all I can think of.

Regards,

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

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