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https://issues.apache.org/jira/browse/FLINK-21675?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17308396#comment-17308396
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Yuval Itzchakov commented on FLINK-21675:
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@Shengkai Fang Hey, would appreciate if you could take the time to review this.
> Push filter into the scan when watermark assigner is the parent of the table
> scan
> ---------------------------------------------------------------------------------
>
> Key: FLINK-21675
> URL: https://issues.apache.org/jira/browse/FLINK-21675
> Project: Flink
> Issue Type: Sub-task
> Components: Table SQL / Planner
> Reporter: Shengkai Fang
> Priority: Major
> Labels: pull-request-available
>
> When watermark assigner is the parent of the table scan, it will block rule
> to apply the filter push down. We can add a rule just like
> {{ProjectWatermarkAssignerTransposeRule}} or extend the rule like
> {{PushWatermarkIntoTableSourceScanAcrossCalcRule}} and
> {{PushWatermarkIntoTableSourceScanRule}}.
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