[jira] [Updated] (FLINK-19822) Remove redundant shuffle for streaming

["godfrey he (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/FLINK-19822?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

godfrey he updated FLINK-19822:
-------------------------------
    Summary: Remove redundant shuffle for streaming  (was: Remove redundant shuffle for stream)

> Remove redundant shuffle for streaming
> --------------------------------------
>
>                 Key: FLINK-19822
>                 URL: https://issues.apache.org/jira/browse/FLINK-19822
>             Project: Flink
>          Issue Type: Sub-task
>          Components: Table SQL / Planner
>            Reporter: godfrey he
>            Assignee: godfrey he
>            Priority: Major
>             Fix For: 1.12.0
>
>
> This is similar [FLINK-12575|https://issues.apache.org/jira/browse/FLINK-12575], we could implement {{satisfyTraits}} method for stream nodes to remove redundant shuffle. This could add more possibilities that more operators can be merged into multiple input operator.
> Note: This feature should only be enabled only when multiple input operator is enabled because currently key selector is applied only at the header of the chain, the state access of other operators in the chain may be not correct.



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