[jira] [Assigned] (FLINK-20490) Don't share inputs between FlinkPhysicalRel and ExecNode

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

     [ https://issues.apache.org/jira/browse/FLINK-20490?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

godfrey he reassigned FLINK-20490:
----------------------------------

    Assignee: godfrey he

> Don't share inputs between FlinkPhysicalRel and ExecNode
> --------------------------------------------------------
>
>                 Key: FLINK-20490
>                 URL: https://issues.apache.org/jira/browse/FLINK-20490
>             Project: Flink
>          Issue Type: Sub-task
>          Components: Table SQL / Planner
>            Reporter: godfrey he
>            Assignee: godfrey he
>            Priority: Major
>
> Currently, all execution nodes extend both from {{RelNode}} and {{ExecNode}}, and they share same input instances which is stored in the {{RelNode}} instance. {{ExecNode#getInputNodes}} just returns the casted {{RelNode}} inputs, code likes:
> {code:java}
> getInputs.map(_.asInstanceOf[ExecNode[_]])
> {code}
> This issue aim to let {{ExecNode}} have its own input instance. It is prepared for the implementation separation between {{RelNode}} and {{ExecNode}}.



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