Mysql 修改数据/删除数据，DML中data为null，导致修改/删除ES数据失败

Mysql 修改数据/删除数据，DML中data为null，导致修改/删除ES数据失败，为什么data为null，insert就不为null

2021-09-22 10:31:54.770 [pool-1-thread-1] INFO c.a.o.canal.client.adapter.logger.LoggerAdapterExample - DML: {"data":null,"database":"test2","destination":"example","es":1632277914000,"groupId":"g1","isDdl":false,"old":null,"pkNames":[],"sql":"UPDATE testsync set name = 'bbb' where name = 'aaabbbcccc'","table":"testsync","ts":1632277914770,"type":"UPDATE"}

原提问者GitHub用户zhangshenghang