org.apache.flink.optimizer.dag.AbstractPartialSolutionNode Maven / Gradle / Ivy
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* to you under the Apache License, Version 2.0 (the
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* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
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* Unless required by applicable law or agreed to in writing, software
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package org.apache.flink.optimizer.dag;
import java.util.Collections;
import java.util.List;
import java.util.Map;
import org.apache.flink.api.common.ExecutionMode;
import org.apache.flink.api.common.operators.Operator;
import org.apache.flink.api.common.operators.SemanticProperties;
import org.apache.flink.api.common.operators.SemanticProperties.EmptySemanticProperties;
import org.apache.flink.optimizer.DataStatistics;
import org.apache.flink.optimizer.costs.CostEstimator;
import org.apache.flink.optimizer.plan.PlanNode;
import org.apache.flink.util.Visitor;
/**
* The optimizer's internal representation of the partial solution that is input to a bulk iteration.
*/
public abstract class AbstractPartialSolutionNode extends OptimizerNode {
protected AbstractPartialSolutionNode(Operator contract) {
super(contract);
}
// --------------------------------------------------------------------------------------------
protected void copyEstimates(OptimizerNode node) {
this.estimatedNumRecords = node.estimatedNumRecords;
this.estimatedOutputSize = node.estimatedOutputSize;
}
public abstract IterationNode getIterationNode();
// --------------------------------------------------------------------------------------------
public boolean isOnDynamicPath() {
return true;
}
public void identifyDynamicPath(int costWeight) {
this.onDynamicPath = true;
this.costWeight = costWeight;
}
@Override
public List getIncomingConnections() {
return Collections.emptyList();
}
@Override
public void setInput(Map, OptimizerNode> contractToNode, ExecutionMode dataExchangeMode) {}
@Override
protected void computeOperatorSpecificDefaultEstimates(DataStatistics statistics) {
// we do nothing here, because the estimates can only be copied from the iteration input
}
@Override
public void computeInterestingPropertiesForInputs(CostEstimator estimator) {
// no children, so nothing to compute
}
@Override
public List getAlternativePlans(CostEstimator estimator) {
if (this.cachedPlans != null) {
return this.cachedPlans;
} else {
throw new IllegalStateException();
}
}
@Override
public SemanticProperties getSemanticProperties() {
return new EmptySemanticProperties();
}
@Override
protected void readStubAnnotations() {}
@Override
public void accept(Visitor visitor) {
if (visitor.preVisit(this)) {
visitor.postVisit(this);
}
}
}