MySQL Bugs: #81943: Refactor use_count in the range optimizer

Bug #81943	Refactor use_count in the range optimizer
Submitted:	21 Jun 2016 8:24	Modified:	23 Aug 2016 14:18
Reporter:	Steinar Gunderson	Email Updates:
Status:	Closed	Impact on me:	None
Category:	MySQL Server: Optimizer	Severity:	S3 (Non-critical)
Version:		OS:	Any
Assigned to:		CPU Architecture:	Any

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Description:
This is a tracking bug for refactoring the refcounting (use_count) in the range optimizer; it is very subtle and largely undocumented.

How to repeat:
Try to read the sql/opt_range.cc and follow the logic for use_count. Your head will hurt.

Posted by developer:
 
Fixed in 8.0.1.

Code cleanup. No changelog entry needed.