[FLINK-21675] predicates can not be pushed into TableScan when there is a WatermarkAssigner between Filter and Scan

• Type: Sub-task
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.13.0
• Component/s: Table SQL / Planner
• Labels: pull-request-available
• Assignee: Yuval Itzchakov
• Reporter: Shengkai Fang
• Created: 09/Mar/21 02:16
• Updated: 28/May/21 09:04
• Resolved: 13/Apr/21 07:47

Description

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.

Issue Links

• links to: GitHub Pull Request #15307