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MySQL Slower In Newer MySQL Releases Than In MySQL 5.6 When Derived Table Is Merged (Doc ID 2552784.1)

Last updated on FEBRUARY 26, 2020

Applies to:

MySQL Server - Version 5.7 and later
Information in this document applies to any platform.

Goal

Explain why MySQL 5.7 is slower on certain queries because derived tables are merged. MySQL 5.6 is more performing because tables are materialized and auto-key is chosen. 

Solution

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In this Document
Goal
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