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https://issues.apache.org/jira/browse/FLINK-8545?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16576235#comment-16576235
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Hequn Cheng commented on FLINK-8545:
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[~pnowojski] Hi, current design is to add an {{UpsertStreamTable}} and use a
rule to generate a {{DataStreamLastRow}} node. The node will process the upsert
stream similar to {{group by + last}}. Furthermore, we also need a
{{CalcLastRowTransposeRule}} to minimise the state.
It would be great to get your suggestions on it.
> Implement upsert stream table source
> -------------------------------------
>
> Key: FLINK-8545
> URL: https://issues.apache.org/jira/browse/FLINK-8545
> Project: Flink
> Issue Type: New Feature
> Components: Table API & SQL
> Reporter: Hequn Cheng
> Assignee: Hequn Cheng
> Priority: Major
>
> As more and more users are eager for ingesting data with upsert mode in flink
> sql/table-api, it is valuable to enable table source with upsert mode. I will
> provide a design doc later and we can have more discussions. Any suggestions
> are warmly welcomed !
>
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