org.apache.flink.compiler.dag

Class FlatMapNode

java.lang.Object

org.apache.flink.compiler.dag.OptimizerNode

org.apache.flink.compiler.dag.SingleInputNode

org.apache.flink.compiler.dag.FlatMapNode

All Implemented Interfaces:

EstimateProvider, DumpableNode<OptimizerNode>, Visitable<OptimizerNode>

public class FlatMapNode
extends SingleInputNode

The optimizer's internal representation of a FlatMap operator 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
FlatMapNode(FlatMapOperatorBase<?,?,?> operator)

Method Summary

Modifier and Type	Method and Description
protected void	computeOperatorSpecificDefaultEstimates(DataStatistics statistics) Computes the estimates for the FlatMap operator.
String	getName() Gets the name of this node.
FlatMapOperatorBase<?,?,?>	getPactContract() Gets the object that specifically describes the contract of this node.
protected List<OperatorDescriptorSingle>	getPossibleProperties()

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

FlatMapNode

public FlatMapNode(FlatMapOperatorBase<?,?,?> operator)

Method Detail

getPactContract

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

Description copied from class: OptimizerNode

Gets the object that specifically describes the contract of this node.

Overrides:

getPactContract in class SingleInputNode

Returns:

This node's contract.

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)

Computes the estimates for the FlatMap operator. Since it un-nests, we assume a cardinality increase. To give the system a hint at data increase, we take a default magic number of a 5 times increase.

Specified by:

computeOperatorSpecificDefaultEstimates in class OptimizerNode