Percona Server for MySQL 8.4.5-5 has been released

Percona Server for MySQL 8.4.5-5 has been released on Thursday, May 29, 2025.

Updates the C++ level of the KMPI library to enhance error handling capabilities.
Improves optimizer behavior by restoring correct handling of const tables in test_quick_select(). A MySQL Upstream refactor (commit 9a13c1c) removed the QEP_TAB dependency, causing get_quick_record_count() to no longer pass const table information. This could lead to suboptimal range scan boundaries. The applied patch resolves the issue by explicitly passing const_tables to test_quick_select(), ensuring consistent behavior with the pre-refactor logic.
Adds changes to the list of MyRocks variables.

Improvements and bug fixes introduced by Oracle for MySQL 8.4.5 and included in Percona Server for MySQL are the following:

Fixed an issue where CHECK TABLE sometimes incorrectly reported that spatial indexes were corrupted. (Bug #37286473)
Fixed an issue in InnoDB redo log recovery to improve data safety after a crash. (Bug #37061960)
Fixed an issue where reading index_id values could lead to incorrect behavior with indexes. (Bug #36993445, Bug #37709706)
Fixed a bug related to the lower_case_table_names setting that caused inconsistent behavior with table names on different systems. (Bug #32288105)
Fixed a bug where mysqldump did not properly escape certain special characters in its output. (Bug #37540722, Bug #37709163)
The fprintf_string() function in mysqldump did not use the correct quote character for escaping strings. (Bug #37607195)

Learn more in Percona Server for MySQL 8.4.5-5 release notes.