On October 10th, 2025, we released MySQL 9.5, the latest Innovation Release. As usual, we released bug fixes for 8.0 and 8.4 LTS, but this post focuses on the newest release.
In this release, we can see contributions related to Connector J and Connector Net, as well as to different server categories.
Connector / J
- #98699 – Allow empty keyStore file for keyStoreTypes that do not require files – Kolbe Kegel
- #99292 – Support Windows time zone \’Coordinated Universal Time\’ – Frédéric Barrière
- #118329 – Optimize BigDecimal zero value handling to reduce memory footprint – Chengjun Huang
- #118688 – com.mysql.cj.protocol.a.StringValueEncoder#getString does not handle string escaping – Feng Shen
Connector / NET
- #118572 – Incorrect column alias used in CASE-WHEN when querying Table-Per-Type inheritance with subclass column name clash – Kristoffer Sjöberg
Optimizer
- #105224 – The dict_stats_analyze_index() function could discard optimal index-based access paths, resulting in suboptimal performance for large tables when empty index statistics are read concurrently or an error leads to empty index statistics – Casa Zang (Tencent)
- #118512 – The missing semi join condition causes incorrect result – Jingqi Tian (Alibaba)
SYS Schema
- #108298 – The ps_trace_thread does not reset the settings for the performance schema when the “File ‘%s’ already exists” exception occurs – Artem Avetian
InnoDB
- #117553 – Crash caused by race condition between MVCC::view_open and purge view – Yin Peng (Tencent)
- #118281 – The mlog read_1_bytes comment now accurately reflects a byte size of 1 byte, rather than 2 bytes – Jeong Geun Lee
MySQL is Open Source, and we at Oracle accept contributions. Please note that processing times may vary depending on the category and complexity.
If you have patches and you also want to be part of the MySQL Contributors, it’s easy; you can send Pull Requests from MySQL’s GitHub repositories or send your patches to Bugs MySQL (signing the Oracle Contributor Agreement is required).
Thanks again to all our notable contributors!
