The EXPLAIN Statement Triggers Warnings
Last updated on JULY 10, 2018
Applies to:MySQL Server - Version 5.5 and later
MySQL Cluster - Version 7.2 and later
Information in this document applies to any platform.
In MySQL 5.7 and later and in 5.6 and earlier using EXPLAIN EXTENDED, the EXPLAIN statement triggers one or more warnings. For example:
The warnings may start occurring after upgrading to MySQL 5.7 or later.
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