[jira] [Created] (FLINK-19282) Support watermark push down with WatermarkStrategy

[Shang Yuanchun (Jira)]

Shengkai Fang created FLINK-19282:
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             Summary: Support watermark push down with WatermarkStrategy
                 Key: FLINK-19282
                 URL: https://issues.apache.org/jira/browse/FLINK-19282
             Project: Flink
          Issue Type: New Feature
          Components: Table SQL / Planner
            Reporter: Shengkai Fang


Push the {{WatermarkStrategy}} into TableSourceScan in the interface {{SupportsWatermarkPushDown}}. Sometimes users define watermark on computed column. Therefore, we will push the computed column of rowtime into {{WatermarkStrategy}} first. For more info, please take a look at [discussion|http://apache-flink-mailing-list-archive.1008284.n3.nabble.com/Merge-SupportsComputedColumnPushDown-and-SupportsWatermarkPushDown-td44387.html].



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