Benchao Li created FLINK-16844: ---------------------------------- Summary: Support retract message for StreamExecGroupWindowAggregate in blink planner Key: FLINK-16844 URL: https://issues.apache.org/jira/browse/FLINK-16844 Project: Flink Issue Type: Improvement Components: Table SQL / Planner Reporter: Benchao Li
Currently the `WindowOperator` in blink planner actually supports retract messages, however in StreamExecGroupWindowAggregate, we throws exception if input is retract. IMO, we can remove this check and let `StreamExecGroupWindowAggregate` support retract messages. This will enhance the ability of blink planner very much.  cc [~jark] -- This message was sent by Atlassian Jira (v8.3.4#803005)