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https://issues.apache.org/jira/browse/FLINK-18613?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jark Wu closed FLINK-18613.
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Resolution: Not A Problem
> How to support retract & upsert sink for a TableSink ?
> ------------------------------------------------------
>
> Key: FLINK-18613
> URL: https://issues.apache.org/jira/browse/FLINK-18613
> Project: Flink
> Issue Type: Wish
> Components: Table SQL / Planner
> Reporter: hehuiyuan
> Priority: Minor
>
> Environment : FLink 1.9 / Blink planner
> Hi , i want to ask a question :
> I have a job that executes multiple sql and a TableSink class:
> (1) insert into table_0 select count（*） from table1;
> (2)insert into table_2 select name, sum(score) form table1 group by name;
>
> The TableSink implements UpsertStreamTablesink interface.
> That is ok for SQL (2), but is not suppported for SQL (1) which there are not
> keys.
>
> But i want to use a TableSink which can support the upsert and retract , can
> you give me some advices? ~ Thanks.
>
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