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https://issues.apache.org/jira/browse/FLINK-21675?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17305689#comment-17305689
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Yuval Itzchakov commented on FLINK-21675:
-----------------------------------------
PR: https://github.com/apache/flink/pull/15307
> 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
>
> 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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