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https://issues.apache.org/jira/browse/FLINK-17550?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Robert Metzger updated FLINK-17550:
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Component/s: Table SQL / API
> set a retract switch
> --------------------
>
> Key: FLINK-17550
> URL: https://issues.apache.org/jira/browse/FLINK-17550
> Project: Flink
> Issue Type: New Feature
> Components: Table SQL / API
> Reporter: Cheng Shi
> Priority: Major
>
> During the execution of flink, especially the sql API, many operations in
> DataStream are not available. In many cases, we don't care about the DELETE
> record when retracting. Is it possible to set a switch so that the DELETE
> record when retracting is not processed? In other words, the downstream only
> receives a value after UPDATE, and does not need to receive the value before
> UPDATE. In some programming modes, processing DELETE records actually makes
> the logic more complicated.
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