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chaiyongqiang commented on FLINK-15221: --------------------------------------- [~jark] thanks . You're right . But i've checked the kafkatablesink. I don't think an overwrite of 'KafkaTableSink' and 'KafkaTableSourceSinkFactory' is a perfect way to gain the end-to-end exactly-once semantic when a user develops an app . It's a too complex for a flink app developer and it makes him focus too much on the details of flink. I think we'd better expose a semantic configuration for app users to set when they want exectly-once semantic. You can have a look at the following issue i opened. How do you think about it? [FLINK-14719|https://issues.apache.org/jira/projects/FLINK/issues/FLINK-14719?filter=allopenissues] > supporting Exactly-once for table APi > ------------------------------------- > > Key: FLINK-15221 > URL: https://issues.apache.org/jira/browse/FLINK-15221 > Project: Flink > Issue Type: Wish > Components: Table SQL / API > Reporter: chaiyongqiang > Priority: Major > > The Table Api doesn't support End to End Exactly once sematic like datastream > Api. Does Flink have a plan for this? -- This message was sent by Atlassian Jira (v8.3.4#803005)