RELEASE NOTE

Important New Feature

Introduce new component named Replica which can simulate PolarDB-X as mysql slave by use sql like ‘change master …’
Support recording Rows_query_event in Global Binlog with a precondition that should set binlog_rows_query_log_events to ON in DN Nodes

Optimize algorithm for TableMapId Generation to guarantee consistent ID for same table
Optimize algorithm with rollback for CDC meta information to resolve possible inconsistency issue in extremely scene，and introduce consistency checking module for meta
Support Skip Selection for disordered TraceId with a new configuration parameter
Add parameterization support whether record implicit primary key to Global Binlog
support utf8mb3 character encoding
support special processing for rotate event which existed in middle of DN binlog file

Fix truncation issue for TableMapId because of incorrect data type usage
Remove two StatusVars in Query Event(MODE_NO_ZERO_IN_DATE和MODE_NO_ZERO_DATE) to resolve program error in mysql slave when processing null timestamp columns
Fix Invalid Checking for Heartbeat Window integrity in LogEventMerger when meet Scale Out/In
Fix Type defination defect of FastSql Repository , which resulting in metadata overwritten with each other between Tables and Indexes with the same name
Fix file size issue in binlog_oss_reocrd table
Fix some bugs of rule mismatching because of missing process for back quote

新增Replica组件，支持通过change master … 语法的方式将PolarDB-X作为MySQL Slave来消费数据
全局Binlog中支持记录Rows_query_event类型数据，前置条件：需将DN节点binlog_rows_query_log_events参数设置为On

修复因数据类型精度不够导致TableMapId被截断问题
删除QueryEvent中的两个状态变量MODE_NO_ZERO_IN_DATE和MODE_NO_ZERO_DATE，解决Timstamp Column值为空时同步到下游MySQL报错问题
解决Scale Out/In场景下，LogEventMerger心跳窗口完整性检测失效问题
修复FastSql Repository类型区分不够精细，导致具有相同名字的Table和Index的元数据相互覆盖问题
修复记录到binlog_oss_record表中的Binlog文件大小错误问题
修复若干因反引号导致的规则匹配失效问题