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* Licensed to the Apache Software Foundation (ASF) under one
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* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
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package org.apache.flink.table.planner.plan.nodes.exec.stream;
import org.apache.flink.api.dag.Transformation;
import org.apache.flink.table.data.RowData;
import org.apache.flink.table.planner.delegation.PlannerBase;
import org.apache.flink.table.planner.plan.nodes.exec.ExecNode;
import org.apache.flink.table.planner.plan.nodes.exec.ExecNodeBase;
import org.apache.flink.table.planner.plan.nodes.exec.InputProperty;
import java.util.List;
/**
* Stream {@link ExecNode} for multiple input which contains a sub-graph of {@link ExecNode}s. The
* root node of the sub-graph is {@link #rootNode}, and the leaf nodes of the sub-graph are the
* output nodes of the {@link #getInputNodes()}.
*
* The following example shows a graph of {@code ExecNode}s with multiple input node:
*
*
{@code
* Sink
* |
* +---------+--------+
* | | |
* | Join |
* | / \ | StreamExecMultipleInput
* | Agg1 Agg2 |
* | | | |
* +----+-------+-----+
* | |
* Exchange1 Exchange2
* | |
* Scan1 Scan2
* }
*
* The multiple input node contains three nodes: `Join`, `Agg1` and `Agg2`. `Join` is the root
* node ({@link #rootNode}) of the sub-graph, `Agg1` and `Agg2` are the leaf nodes of the sub-graph,
* `Exchange1` and `Exchange2` are the input nodes of the multiple input node.
*/
public class StreamExecMultipleInput extends ExecNodeBase
implements StreamExecNode {
private final ExecNode rootNode;
public StreamExecMultipleInput(
List inputProperties, ExecNode rootNode, String description) {
super(inputProperties, rootNode.getOutputType(), description);
this.rootNode = rootNode;
}
@Override
protected Transformation translateToPlanInternal(PlannerBase planner) {
throw new UnsupportedOperationException("This method is not implemented yet.");
}
}