ProxySQL 3.0.4 Release Notes

ProxySQL 3.0.4 includes numerous bug fixes, improvements, and new features.

New Features

• Add special handling for unexpected COM_PING packets #5257
• Add PostgreSQL-Specific Tokenizer for Query Digest Generation #5254
• Add SSL support for backend connections in PGSQL monitor #5237
• Add comments to select @@version queries to bypass ProxySQL interception #5251
• Added handling of SELECT @@version and SELECT VERSION() without backend #4889
• Add fast forward replication deprecate EOF test and update test infrastructure (closes #5062) #5241
• add opensuse16 packaging #5230
• [skip-ci] V3.0.agentics - Add Claude Code Agent Definitions and Architecture Documentation #5115
• docs: Add comprehensive Doxygen documentation for GTID refactoring #5229
• Add TAP test writing guide and GitHub automation improvements #5215
• Implement Fast Forward Grace Close Feature to Prevent Data Loss #5203

Bug Fixes

• Fix: Make cur_cmd_cmnt thread-safe #5259
• Documentation additions and bug fix for vacuum_stats() #5258
• Fix cache_empty_result=0 not caching non-empty resultsets (issue #5248) #5250
• Fix: Automatic prefix stripping for mysql_variables, pgsql_variables, and admin_variables config parsing #5247
• Fix artificially high ping latency in MySQL backend monitoring #5199
• Fix issue 4855: Incorrect affected rows reporting for DDL queries #5232
• Add TCP keepalive warnings when disabled (issue #5212) #5228

Improvements

• Improve fast forward replication CLIENT_DEPRECATE_EOF validation (closes #5062) #5240
• Refactored Prepared-Statement Cache Design (Lock-Free Hot Path) - Part 2 #5225
• gtid: Refactor reconnect logic & prevent events_count reset #5226

Documentation

• Permanent FF sessions + check_data_flow docs #5245

Testing

• Add delay to let ProxySQL process mysql_stmt_close() #5198
• regroup tests to balance group test time #5207