Prepared Statements Get Incorrect Optimizer Plan When prefer_ordering_index Is Enabled.
(Doc ID 2810114.1)
Last updated on SEPTEMBER 27, 2021
Applies to:MySQL Server - Version 8.0 and later
Information in this document applies to any platform.
Prepared statements execute slower and with different optimizer plan to non-prepared statements.
With non-prepared statements, EXPLAIN shows Extra: Backward index scan.
With prepared statements, EXPLAIN shows Extra: Using filesort
Upgraded to 8.0.23 thru 8.0.25.
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