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https://issues.apache.org/jira/browse/FLINK-21899?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jark Wu reassigned FLINK-21899:
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Assignee: Jark Wu
> Introduce SOURCE_WATERMARK built-infunction to preserve watermark from source
> -----------------------------------------------------------------------------
>
> Key: FLINK-21899
> URL: https://issues.apache.org/jira/browse/FLINK-21899
> Project: Flink
> Issue Type: Sub-task
> Components: Table SQL / API
> Reporter: Jark Wu
> Assignee: Jark Wu
> Priority: Major
>
> The SOURCE_WATERMARK function doesn't have concrete implementation. The
> {{eval()}} function should throw a meaningful exception message to indicate
> users the function should only be used in DDL to generate a watermark
> preserved from source system.
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