[jira] [Created] (FLINK-20084) Fix NPE when generating watermark for record whose rowtime field is null after watermark push down

[Shang Yuanchun (Jira)]

Shengkai Fang created FLINK-20084:
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             Summary: Fix NPE when generating watermark for record whose rowtime field is null after watermark push down
                 Key: FLINK-20084
                 URL: https://issues.apache.org/jira/browse/FLINK-20084
             Project: Flink
          Issue Type: Bug
          Components: Table SQL / Planner
    Affects Versions: 1.12.0
            Reporter: Shengkai Fang
             Fix For: 1.12.0


The problem is from the class {{PushWatermarkIntoTableSourceScanRuleBase$DefaultWatermarkGeneratorSupplier$DefaultWatermarkGenerator#onEvent}}. It doesn't test whether the calculated watermark is null before set.  

 



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