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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 edited comment on FLINK-8545 at 8/10/18 1:09 PM:
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[~pnowojski] Hi, current design is to add an {{UpsertStreamTable}}(also rename 
current DataStreamTable to AppendStreamTable) 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.


was (Author: hequn8128):
[~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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