org.apache.flink.compiler.dag

Class GroupReduceNode

java.lang.Object

org.apache.flink.compiler.dag.OptimizerNode

org.apache.flink.compiler.dag.SingleInputNode

org.apache.flink.compiler.dag.GroupReduceNode

All Implemented Interfaces:

EstimateProvider, DumpableNode<OptimizerNode>, Visitable<OptimizerNode>

public class GroupReduceNode
extends SingleInputNode

The Optimizer representation of a Reduce contract node.

Nested Class Summary

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

OptimizerNode.UnclosedBranchDescriptor

Field Summary

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

inConn, keys

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

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

Constructor Summary

Constructors

Constructor and Description
GroupReduceNode(GroupReduceNode reducerToCopyForCombiner)
GroupReduceNode(GroupReduceOperatorBase<?,?,?> pactContract) Creates a new ReduceNode for the given contract.

Method Summary

Modifier and Type	Method and Description
protected void	computeOperatorSpecificDefaultEstimates(DataStatistics statistics)
GroupReduceNode	getCombinerUtilityNode()
String	getName() Gets the name of this node.
GroupReduceOperatorBase<?,?,?>	getPactContract() Gets the contract object for this reduce node.
protected List<OperatorDescriptorSingle>	getPossibleProperties()
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.compiler.dag.SingleInputNode

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

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

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

Methods inherited from class java.lang.Object

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

Constructor Detail

GroupReduceNode

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

Creates a new ReduceNode for the given contract.

Parameters:

pactContract - The reduce contract object.

GroupReduceNode

public GroupReduceNode(GroupReduceNode reducerToCopyForCombiner)

Method Detail

getPactContract

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

Gets the contract object for this reduce node.

Overrides:

getPactContract in class SingleInputNode

Returns:

The contract.

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.

getName

public String getName()

Description copied from class: OptimizerNode

Gets the name of this node. This returns either the name of the PACT, or a string marking the node as a data source or a data sink.

Specified by:

getName in class OptimizerNode

Returns:

The node name.

getPossibleProperties

protected List<OperatorDescriptorSingle> getPossibleProperties()

Specified by:

getPossibleProperties in class SingleInputNode

computeOperatorSpecificDefaultEstimates

protected void computeOperatorSpecificDefaultEstimates(DataStatistics statistics)

Specified by:

computeOperatorSpecificDefaultEstimates in class OptimizerNode

getCombinerUtilityNode

public GroupReduceNode getCombinerUtilityNode()