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https://issues.apache.org/jira/browse/FLINK-20490?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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godfrey he closed FLINK-20490.
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Resolution: Done
master: 314b4d0442da391ef7e56c6cea817eccf43bf2a3
> 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
> Labels: pull-request-available
>
> 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 instances. It is
> prepared for the implementation separation between {{RelNode}} and
> {{ExecNode}}.
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