DBLE 3.22.07.0 Release Notes and Feature Overview

DBLE Project Introduction

DBLE is an enterprise‑grade open‑source distributed middleware, nicknamed “MyCat Plus”, known for its simplicity, stability, active maintenance, strong community support, and extensive feature set such as data horizontal sharding, read‑write separation, distributed transaction support, multi‑shard algorithms, global IDs, and IP/SQL black‑white lists.

New Version Main Feature Updates

1. Read‑Write Separation Local Read : When the data‑center configuration of a DBLE instance matches that of a DB instance, the DB instance is treated as local and read traffic is preferentially routed to it; if the local instance is unavailable, traffic is redirected according to policy.

2. OpenSSL Support : DBLE can enable TLS‑encrypted connections, allowing MySQL clients and drivers to connect securely.

3. Hint‑Based Query Plan Improvement : Enhanced support and optimization for hints that specify query execution plans.

Complete Release Notes

Features

[#3298] Refine the scope of reload configuration.

[#3398] Add busy‑rate statistics for front‑end connections.

[#3399] Display thread ownership of front‑ and back‑end connections.

[#3397] Provide a method to remove distributed locks.

[#3400] Support local read configuration for read‑write separation.

[#3401] Support OpenSSL.

[#3403][#3405] Improve hint parsing.

Main Defect Fixes

[#2919] Fixed field‑not‑found error when GROUP BY contains SUBSTRING.

[#2918] Corrected log error when sharding node count exceeds defined sharding table count.

[#3404] Resolved several heartbeat issues.

Optimized DDL execution failure messages.

Addressed issues with back‑end instances using ClickHouse.

Incompatibilities with Previous Versions

None.

Acknowledgments

Thanks to @holmes1849082248 for reporting bugs.

Appreciation to GitHub contributors; stars have surpassed 960.

Thanks to the QQ group (669663113) and WeChat community for valuable feedback.

Additional Resources

Official project: https://github.com/actiontech/dble

Documentation: https://actiontech.github.io/dble-docs-cn

Release downloads and notes: https://github.com/actiontech/dble/releases

Official courses: DBLE Quick Start (hands‑on video + documentation) and DBLE Advanced Course .

Recent related articles: Distributed | From DBLE Logs to MySQL Source Code Study , Distributed | Migrating Data from MySQL to DBLE with TiDB DM , and Distributed | Migrating Business from MyCAT to DBLE .