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Early row lookup
Posted by: Zhou Zhou
Date: March 02, 2020 03:49AM

Hi everyone here. I have recently learned about the "late row lookup" optimization from the following posts:
https://explainextended.com/2009/10/23/mysql-order-by-limit-performance-late-row-lookups/
https://explainextended.com/2011/02/11/late-row-lookups-innodb/

So my question is: why late row lookup is not implemented in MySQL and/or InnoDB even ten years have passed?

(I know other optimizations able to accelerate paging. I'm just curious about it.)

Thanks!

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