Bug #86011 Grammatical solecism in 8.0 manual
Submitted: 20 Apr 2017 1:28 Modified: 15 May 2017 16:30
Reporter: Peter Brawley (Basic Quality Contributor) Email Updates:
Status: Closed Impact on me:
None 
Category:MySQL Server: Documentation Severity:S3 (Non-critical)
Version:8.0 OS:Any
Assigned to: CPU Architecture:Any

[20 Apr 2017 1:28] Peter Brawley 
Description:
https://dev.mysql.com/doc/refman/8.0/en/descending-indexes.html says 

Descending indexes are supported only for the InnoDB storage engine, with these limitations:
...
MIN()/MAX() optimization for queries that use aggregate functions but not GROUP BY does not use indexes with descending key parts.
...

which makes no sense.

How to repeat:
https://dev.mysql.com/doc/refman/8.0/en/descending-indexes.html says
[20 Apr 2017 5:36] MySQL Verification Team 
Hello Peter,

Thank you for the report and feedback!

Thanks,
Umesh
[15 May 2017 16:20] Paul DuBois 
Posted by developer:
 
Indexes that have descending key parts are not used for MIN/MAX() optimization of queries that invoke aggregate functions but do not have a GROUP BY clause.
[15 May 2017 16:30] Peter Brawley 
Clearer, but would be clearer still in active rather than passive voice.