Type:
Task
Priority:
Critical
Resolution:
Fixed
MDEV-32113 has introduced charset narrowing optimization.
It was introduced in 10.6 and it is not enabled by default.
We should enable it by default. It should be done in 11.4 as its the earliest development release.
Also, we should consider removing the optimizer switch flag (either in this or in a later version).
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serg, I now see it has been already done in 11.3 by:
commit e987b9350cb83038c73a165922986441f345a3a9
Author: Sergei Petrunia <sergey@mariadb.com> Mon Jun 19 17:53:16 2023
Committer: Sergei Petrunia <sergey@mariadb.com> Tue Sep 12 17:14:43 2023
MDEV-31496: Make optimizer handle UCASE(varchar_col)=...
The backport to 10.6 was done after
commit 4941ac9192394a1489f0bf01b6dd2ee5ec2906c9 (origin/bb-10.6-mdev32113-variant3, bb-10.6-mdev32113-variant3)
Author: Sergei Petrunia <sergey@mariadb.com>
Date: Tue Sep 19 18:22:49 2023 +0300
MDEV-32113: utf8mb3_key_col=utf8mb4_value cannot be used for ref