Disable index for optimizer, check if able to be dropped

Registered by Stewart Smith

Have optimizer not recognize index for query plan, but still have engine maintain it, to check if the index is safe to drop or not.

Implemented in MySQL 8.0: http://dev.mysql.com/worklog/task/?id=8697

Blueprint information

Status:
Not started
Approver:
None
Priority:
Not
Drafter:
Laurynas Biveinis
Direction:
Approved
Assignee:
None
Definition:
Drafting
Series goal:
None
Implementation:
Unknown
Milestone target:
None

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