请问读取kafka的数据， 发现没有iskey这个属性， 请问该如何设置？
环境信息
canal version1.1.2 mysql version 5.7.13 kafka 接受的数据如下： {"data":[{"mm":"11","mm2":"guo"}],"database":"test_canal","es":1545908671000,"id":1,"isDdl":false,"mysqlType":{"mm":"bigint(255)","mm2":"varchar(255)"},"old":null,"sql":"","sqlType":{"mm":-5,"mm2":12},"table":"table222","ts":1545908671246,"type":"INSERT"} {"data":[{"mm":"11","mm2":"guo"}],"database":"test_canal","es":1545908671000,"id":2,"isDdl":false,"mysqlType":{"mm":"bigint(255)","mm2":"varchar(255)"},"old":null,"sql":"","sqlType":{"mm":-5,"mm2":12},"table":"table222","ts":1545908671345,"type":"INSERT"} {"data":[{"mm":"11","mm2":"guo"}],"database":"test_canal","es":1545908671000,"id":2,"isDdl":false,"mysqlType":{"mm":"bigint(255)","mm2":"varchar(255)"},"old":null,"sql":"","sqlType":{"mm":-5,"mm2":12},"table":"table222","ts":1545908671245,"type":"INSERT"} {"data":[{"mm":"12","mm2":"guo"}],"database":"test_canal","es":1545908679000,"id":3,"isDdl":false,"mysqlType":{"mm":"bigint(255)","mm2":"varchar(255)"},"old":null,"sql":"","sqlType":{"mm":-5,"mm2":12},"table":"table222","ts":1545908679794,"type":"INSERT"} 发现没有iskey 属性
原提问者GitHub用户guojingzoe
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