canal有考虑事务回滚的Event吗
mysql的binlog文档在介绍XID_EVENT时有这么一段
XID_EVENT Generated for a commit of a transaction that modifies one or more tables of an XA-capable storage engine. Normal transactions are implemented by sending a QUERY_EVENT containing a BEGIN statement and a QUERY_EVENT containing a COMMIT statement (or a ROLLBACK statement if the transaction is rolled back).
但是我看canal1.24代码中解析QUERY_EVENT时，只考虑了BEGIN和COMMIT，并没有考虑ROLLBACK，请问这样做的原因是什么呢？
https://dev.mysql.com/doc/refman/5.7/en/innodb-and-mysql-replication.html 这里又有这么一段叙述：
Transactions that fail on the master do not affect replication at all. MySQL replication is based on the binary log where MySQL writes SQL statements that modify data. A transaction that fails (for example, because of a foreign key violation, or because it is rolled back) is not written to the binary log,
貌似并不会记录回滚的binlog...有没有特别清楚的人呢
原提问者GitHub用户whyliyu
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