org.apache.flink.optimizer.dag

Class JoinNode

java.lang.Object

org.apache.flink.optimizer.dag.OptimizerNode

org.apache.flink.optimizer.dag.TwoInputNode

org.apache.flink.optimizer.dag.JoinNode

All Implemented Interfaces:

EstimateProvider, DumpableNode<OptimizerNode>, Visitable<OptimizerNode>

public class JoinNode
extends TwoInputNode

The Optimizer representation of a join operator.

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.TwoInputNode

input1, input2, keys1, keys2

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
JoinNode(InnerJoinOperatorBase<?,?,?,?> joinOperatorBase) Creates a new JoinNode for the given join operator.

Method Summary

Modifier and Type	Method and Description
protected void	computeOperatorSpecificDefaultEstimates(DataStatistics statistics) The default estimates build on the principle of inclusion: The smaller input key domain is included in the larger input key domain.
InnerJoinOperatorBase<?,?,?,?>	getOperator() Gets the contract object for this match node.
String	getOperatorName() Gets the name of this node, which is the name of the function/operator, or data source / data sink.
protected List<OperatorDescriptorDual>	getPossibleProperties()
void	makeJoinWithSolutionSet(int solutionsetInputIndex)

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

accept, addLocalCandidates, computeInterestingPropertiesForInputs, computeUnclosedBranchStack, getAlternativePlans, getFirstIncomingConnection, getFirstPredecessorNode, getIncomingConnections, getSecondIncomingConnection, getSecondPredecessorNode, getSemanticProperties, getSemanticPropertiesForGlobalPropertyFiltering, getSemanticPropertiesForLocalPropertyFiltering, instantiate, placePipelineBreakersIfNecessary, 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

JoinNode

public JoinNode(InnerJoinOperatorBase<?,?,?,?> joinOperatorBase)

Creates a new JoinNode for the given join operator.

Parameters:

joinOperatorBase - The join operator object.

Method Detail

getOperator

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

Gets the contract object for this match node.

Overrides:

getOperator in class TwoInputNode

Returns:

The contract.

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<OperatorDescriptorDual> getPossibleProperties()

Specified by:

getPossibleProperties in class TwoInputNode

makeJoinWithSolutionSet

public void makeJoinWithSolutionSet(int solutionsetInputIndex)

computeOperatorSpecificDefaultEstimates

protected void computeOperatorSpecificDefaultEstimates(DataStatistics statistics)

The default estimates build on the principle of inclusion: The smaller input key domain is included in the larger input key domain. We also assume that every key from the larger input has one join partner in the smaller input. The result cardinality is hence the larger one.

Specified by:

computeOperatorSpecificDefaultEstimates in class OptimizerNode