MySQL Bugs: #83473: Reduce number of dictionary cache lookups

Bug #83473	Reduce number of dictionary cache lookups
Submitted:	21 Oct 2016 6:46	Modified:	23 May 2017 5:52
Reporter:	Jon Olav Hauglid	Email Updates:
Status:	Closed	Impact on me:	None
Category:	MySQL Server: Data Dictionary	Severity:	S3 (Non-critical)
Version:	8.0.1	OS:	Any
Assigned to:		CPU Architecture:	Any

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Description:
Currently our internal APIs send information about dictionary objects by passing their name (e.g. const char *db).
Instead we should pass references/pointers to the new dictionary objects (e.g. const dd::Schema &schema).
This removes the need to do several duplicate dictionary cache lookups and simplifies code.

How to repeat:
n/a

Posted by developer:
 
Fixed as of the upcoming 8.0.2 release, and here's the changelog entry:

The number of data dictionary cache lookups was reduced, and ALTER TABLE
handling of triggers was improved help ensure trigger persistence in case
of a server exit during ALTER TABLE processing.