org.apache.flink.optimizer.dag

Class GroupReduceNode

java.lang.Object

org.apache.flink.optimizer.dag.OptimizerNode

org.apache.flink.optimizer.dag.SingleInputNode

org.apache.flink.optimizer.dag.GroupReduceNode

All Implemented Interfaces:

EstimateProvider, DumpableNode<OptimizerNode>, Visitable<OptimizerNode>

public class GroupReduceNode
extends SingleInputNode

The optimizer representation of a GroupReduce operation.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.flink.optimizer.dag.OptimizerNode

OptimizerNode.UnclosedBranchDescriptor

Field Summary

Fields inherited from class org.apache.flink.optimizer.dag.SingleInputNode

inConn, keys

Fields inherited from class org.apache.flink.optimizer.dag.OptimizerNode

cachedPlans, closedBranchingNodes, costWeight, estimatedNumRecords, estimatedOutputSize, hereJoinedBranches, id, MAX_DYNAMIC_PATH_COST_WEIGHT, onDynamicPath, openBranches, uniqueFields

Constructor Summary

Constructors

Constructor and Description
GroupReduceNode(GroupReduceOperatorBase<?,?,?> operator) Creates a new optimizer node for the given operator.

Method Summary

Modifier and Type	Method and Description
protected void	computeOperatorSpecificDefaultEstimates(DataStatistics statistics)
GroupReduceNode	getCombinerUtilityNode()
GroupReduceOperatorBase<?,?,?>	getOperator() Gets the operator represented by this optimizer node.
String	getOperatorName() Gets the name of this node, which is the name of the function/operator, or data source / data sink.
protected List<OperatorDescriptorSingle>	getPossibleProperties()
protected SemanticProperties	getSemanticPropertiesForLocalPropertyFiltering()
boolean	isCombineable() Checks, whether a combiner function has been given for the function encapsulated by this reduce contract.

Methods inherited from class org.apache.flink.optimizer.dag.SingleInputNode

accept, addLocalCandidates, computeInterestingPropertiesForInputs, computeUnclosedBranchStack, getAlternativePlans, getIncomingConnection, getIncomingConnections, getPredecessorNode, getSemanticProperties, getSemanticPropertiesForGlobalPropertyFiltering, instantiateCandidate, setIncomingConnection, setInput

Methods inherited from class org.apache.flink.optimizer.dag.OptimizerNode

addBroadcastConnection, addClosedBranch, addClosedBranches, addOutgoingConnection, areBranchCompatible, clearInterestingProperties, computeOutputEstimates, computeUnclosedBranchStackForBroadcastInputs, computeUnionOfInterestingPropertiesFromSuccessors, getBranchesForParent, getBroadcastConnectionNames, getBroadcastConnections, getClosedBranchingNodes, getCostWeight, getDumpableInputs, getEstimatedAvgWidthPerOutputRecord, getEstimatedNumRecords, getEstimatedOutputSize, getId, getInterestingProperties, getMaxDepth, getMinimalMemoryAcrossAllSubTasks, getOpenBranches, getOptimizerNode, getOutgoingConnections, getParallelism, getPlanNode, getPredecessors, getUniqueFields, hasUnclosedBranches, haveAllOutputConnectionInterestingProperties, identifyDynamicPath, initId, isBranching, isOnDynamicPath, markAllOutgoingConnectionsAsPipelineBreaking, mergeLists, prunePlanAlternatives, prunePlanAlternativesWithCommonBranching, readStubAnnotations, readUniqueFieldsAnnotation, removeClosedBranches, setBroadcastInputs, setEstimatedNumRecords, setEstimatedOutputSize, setParallelism, toString

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

GroupReduceNode

public GroupReduceNode(GroupReduceOperatorBase<?,?,?> operator)

Creates a new optimizer node for the given operator.

Parameters:

operator - The reduce operation.

Method Detail

getOperator

public GroupReduceOperatorBase<?,?,?> getOperator()

Gets the operator represented by this optimizer node.

Overrides:

getOperator in class SingleInputNode

Returns:

The operator represented by this optimizer node.

isCombineable

public boolean isCombineable()

Checks, whether a combiner function has been given for the function encapsulated by this reduce contract.

Returns:

True, if a combiner has been given, false otherwise.

getOperatorName

public String getOperatorName()

Description copied from class: OptimizerNode

Gets the name of this node, which is the name of the function/operator, or data source / data sink.

Specified by:

getOperatorName in class OptimizerNode

Returns:

The node name.

getPossibleProperties

protected List<OperatorDescriptorSingle> getPossibleProperties()

Specified by:

getPossibleProperties in class SingleInputNode

getSemanticPropertiesForLocalPropertyFiltering

protected SemanticProperties getSemanticPropertiesForLocalPropertyFiltering()

Overrides:

getSemanticPropertiesForLocalPropertyFiltering in class SingleInputNode

computeOperatorSpecificDefaultEstimates

protected void computeOperatorSpecificDefaultEstimates(DataStatistics statistics)

Specified by:

computeOperatorSpecificDefaultEstimates in class OptimizerNode

getCombinerUtilityNode

public GroupReduceNode getCombinerUtilityNode()