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https://issues.apache.org/jira/browse/FLINK-20435?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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godfrey he reassigned FLINK-20435:
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Assignee: godfrey he
> Refactor ExecNode
> -----------------
>
> Key: FLINK-20435
> URL: https://issues.apache.org/jira/browse/FLINK-20435
> Project: Flink
> Issue Type: Improvement
> Components: Table SQL / API
> Reporter: godfrey he
> Assignee: godfrey he
> Priority: Major
>
> Currently, there are many improvements about ExecNode:
> 1. simplify type parameter of {{ExecNode}}. Currently,
> {{ExecNode#translateToPlan}} takes {{BatchPlanner}} or {{StreamPlanner}} as a
> parameter, so {{ExecNode}} has a type parameter {{E <: Planner}}, which
> indicates the node is a batch node or a streaming node. While in the future,
> a plan may contain both batch nodes and stream node. The type parameter can
> be removed, the implementation base class can cast the planner to expected
> planner.
> 2. port ExecNode to Java
> 3. separate the implementation of {{RelNode}} and {{ExecNode}}. Currently, an
> execution node extends both from {{RelNode}} and {{ExecNode}}. After a
> physical node is converted to an exec node, many parameters are unnecessary,
> such as: RelOptCluster, RelTraitSet, etc. With more optimizations on
> {{ExecNode}}, We need {{ExecNode}} to be cleaner and simpler. So we will
> separate the implementation of {{RelNode}} and {{ExecNode}}.
> This is an umbrella issue, we will create more related sub-tasks.
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