Jark Wu created FLINK-14621:
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Summary: Do not generate watermark assigner operator if no time
attribute operations on rowtime
Key: FLINK-14621
URL: https://issues.apache.org/jira/browse/FLINK-14621
Project: Flink
Issue Type: Sub-task
Components: Table SQL / Planner
Reporter: Jark Wu
Currently, if watermark is specified in DDL, there is always a watermark
assigner operator generated. However, it is only needed when time attribute
operations (e.g. windows) on the rowtime.
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