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No documentation about EXPLAIN fields in JSON fornat
Posted by: Matias Fernandez
Date: June 17, 2018 07:33AM

Hi, I'm trying to learn how to take advantage of EXPLAIN FORMAT=JSON output but I couldn't find any documentation inside mysql docs about the meaning of different fields like:

rows_examined_per_scan
rows_produced_per_join
filtered
read_cost
eval_cost
prefix_cost
Etc...

Is there any place where I can find an explanation on that? Is there any plan to add that to the docs?

Thanks!

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No documentation about EXPLAIN fields in JSON fornat
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June 17, 2018 07:33AM


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