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https://issues.apache.org/jira/browse/FLINK-19694?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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ASF GitHub Bot updated FLINK-19694:
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Labels: pull-request-available (was: )
> Support [UPDATE_AFTER, DELETE] ChangelogMode for ScanTableSource
> ----------------------------------------------------------------
>
> Key: FLINK-19694
> URL: https://issues.apache.org/jira/browse/FLINK-19694
> Project: Flink
> Issue Type: Sub-task
> Components: Table SQL / API, Table SQL / Planner
> Reporter: Jark Wu
> Assignee: Jark Wu
> Priority: Major
> Labels: pull-request-available
> Fix For: 1.12.0
>
>
> Currently, we only support insert-only or all-kinds (e.g. CDC format)
> ChangelogMode. In this issue, we want to support [UPDATE_AFTER, DELETE]
> ChangelogMode which indicates the source will emit only UPDATE_AFTER and
> DELETE messages during runtime (e.g. an upsert source). The planner will add
> the a materialization operator when the ChangelogMode of the source is
> [UPDATE_AFTER, DELETE].
> The materialization operator will materialize the upsert stream and generate
> changelog stream with full change messages. In the physical operator, we will
> use state to know whether the key is the first time to be seen. The operator
> will produce INSERT rows, or additionally generate UPDATE_BEFORE rows for the
> previous image, or produce DELETE rows with all columns filled with values.
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