org.apache.flink.optimizer.dag

Class WorksetNode

java.lang.Object

org.apache.flink.optimizer.dag.OptimizerNode

org.apache.flink.optimizer.dag.AbstractPartialSolutionNode

org.apache.flink.optimizer.dag.WorksetNode

All Implemented Interfaces:

EstimateProvider, DumpableNode<OptimizerNode>, Visitable<OptimizerNode>

public class WorksetNode
extends AbstractPartialSolutionNode

The optimizer's internal representation of the partial solution that is input to a bulk iteration.

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.OptimizerNode

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

Constructor Summary

Constructors

Constructor and Description
WorksetNode(DeltaIterationBase.WorksetPlaceHolder<?> psph, WorksetIterationNode iterationNode)

Method Summary

Modifier and Type	Method and Description
void	computeOutputEstimates(DataStatistics statistics) Causes this node to compute its output estimates (such as number of rows, size in bytes) based on the inputs and the compiler hints.
void	computeUnclosedBranchStack() This method causes the node to compute the description of open branches in its sub-plan.
WorksetPlanNode	getCurrentWorksetPlanNode()
WorksetIterationNode	getIterationNode()
DeltaIterationBase.WorksetPlaceHolder<?>	getOperator() Gets the contract object for this data source node.
String	getOperatorName() Gets the name of this node, which is the name of the function/operator, or data source / data sink.
void	setCandidateProperties(GlobalProperties gProps, LocalProperties lProps, Channel initialInput)

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

accept, computeInterestingPropertiesForInputs, computeOperatorSpecificDefaultEstimates, copyEstimates, getAlternativePlans, getIncomingConnections, getSemanticProperties, identifyDynamicPath, isOnDynamicPath, readStubAnnotations, setInput

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

addBroadcastConnection, addClosedBranch, addClosedBranches, addOutgoingConnection, areBranchCompatible, clearInterestingProperties, computeUnclosedBranchStackForBroadcastInputs, computeUnionOfInterestingPropertiesFromSuccessors, getBranchesForParent, getBroadcastConnectionNames, getBroadcastConnections, getClosedBranchingNodes, getCostWeight, getDumpableInputs, getEstimatedAvgWidthPerOutputRecord, getEstimatedNumRecords, getEstimatedOutputSize, getId, getInterestingProperties, getMaxDepth, getMinimalMemoryAcrossAllSubTasks, getOpenBranches, getOptimizerNode, getOutgoingConnections, getParallelism, getPlanNode, getPredecessors, getUniqueFields, hasUnclosedBranches, haveAllOutputConnectionInterestingProperties, initId, isBranching, markAllOutgoingConnectionsAsPipelineBreaking, mergeLists, prunePlanAlternatives, prunePlanAlternativesWithCommonBranching, 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

WorksetNode

public WorksetNode(DeltaIterationBase.WorksetPlaceHolder<?> psph,
                   WorksetIterationNode iterationNode)

Method Detail

setCandidateProperties

public void setCandidateProperties(GlobalProperties gProps,
                                   LocalProperties lProps,
                                   Channel initialInput)

getCurrentWorksetPlanNode

public WorksetPlanNode getCurrentWorksetPlanNode()

getIterationNode

public WorksetIterationNode getIterationNode()

Specified by:

getIterationNode in class AbstractPartialSolutionNode

computeOutputEstimates

public void computeOutputEstimates(DataStatistics statistics)

Description copied from class: OptimizerNode

Causes this node to compute its output estimates (such as number of rows, size in bytes) based on the inputs and the compiler hints. The compiler hints are instantiated with conservative default values which are used if no other values are provided. Nodes may access the statistics to determine relevant information.

Overrides:

computeOutputEstimates in class OptimizerNode

Parameters:

statistics - The statistics object which may be accessed to get statistical information. The parameter may be null, if no statistics are available.

getOperator

public DeltaIterationBase.WorksetPlaceHolder<?> getOperator()

Gets the contract object for this data source node.

Overrides:

getOperator in class OptimizerNode

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.

computeUnclosedBranchStack

public void computeUnclosedBranchStack()

Description copied from class: OptimizerNode

This method causes the node to compute the description of open branches in its sub-plan. An open branch describes, that a (transitive) child node had multiple outputs, which have not all been re-joined in the sub-plan. This method needs to set the openBranches field to a stack of unclosed branches, the latest one top. A branch is considered closed, if some later node sees all of the branching node's outputs, no matter if there have been more branches to different paths in the meantime.

Specified by:

computeUnclosedBranchStack in class OptimizerNode