org.apache.flink.optimizer.dag

类 DataSinkNode

java.lang.Object

org.apache.flink.optimizer.dag.OptimizerNode

org.apache.flink.optimizer.dag.DataSinkNode

所有已实现的接口:

EstimateProvider, DumpableNode<OptimizerNode>, org.apache.flink.util.Visitable<OptimizerNode>

public class DataSinkNode
extends OptimizerNode

The Optimizer representation of a data sink.

嵌套类概要

从类继承的嵌套类/接口 org.apache.flink.optimizer.dag.OptimizerNode

OptimizerNode.UnclosedBranchDescriptor

字段概要

字段

限定符和类型	字段和说明
protected DagConnection	input

从类继承的字段 org.apache.flink.optimizer.dag.OptimizerNode

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

构造器概要

构造器

构造器和说明
DataSinkNode(org.apache.flink.api.common.operators.GenericDataSinkBase<?> sink) Creates a new DataSinkNode for the given sink operator.

方法概要

限定符和类型	方法和说明
void	accept(org.apache.flink.util.Visitor<OptimizerNode> visitor) This method implements the visit of a depth-first graph traversing visitor.
void	computeInterestingPropertiesForInputs(CostEstimator estimator) Tells the node to compute the interesting properties for its inputs.
protected void	computeOperatorSpecificDefaultEstimates(DataStatistics statistics) Computes the estimated outputs for the data sink.
void	computeUnclosedBranchStack() This method causes the node to compute the description of open branches in its sub-plan.
List<PlanNode>	getAlternativePlans(CostEstimator estimator) Computes the plan alternatives for this node, an implicitly for all nodes that are children of this node.
protected List<OptimizerNode.UnclosedBranchDescriptor>	getBranchesForParent(DagConnection parent)
List<DagConnection>	getIncomingConnections() Gets all incoming connections of this node.
DagConnection	getInputConnection() Gets the input of the sink.
org.apache.flink.api.common.operators.GenericDataSinkBase<?>	getOperator() Gets the operator for which this optimizer sink node was created.
String	getOperatorName() Gets the name of this node, which is the name of the function/operator, or data source / data sink.
List<DagConnection>	getOutgoingConnections() Gets all outgoing connections, which is an empty set for the data sink.
OptimizerNode	getPredecessorNode() Gets the predecessor of this node.
org.apache.flink.api.common.operators.SemanticProperties	getSemanticProperties()
void	setInput(Map<org.apache.flink.api.common.operators.Operator<?>,OptimizerNode> contractToNode, org.apache.flink.api.common.ExecutionMode defaultExchangeMode) This function connects the predecessors to this operator.

从类继承的方法 org.apache.flink.optimizer.dag.OptimizerNode

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

从类继承的方法 java.lang.Object

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

字段详细资料

input

protected DagConnection input

构造器详细资料

DataSinkNode

public DataSinkNode(org.apache.flink.api.common.operators.GenericDataSinkBase<?> sink)

Creates a new DataSinkNode for the given sink operator.

参数:

sink - The data sink contract object.

方法详细资料

getInputConnection

public DagConnection getInputConnection()

Gets the input of the sink.

返回:

The input connection.

getPredecessorNode

public OptimizerNode getPredecessorNode()

Gets the predecessor of this node.

返回:

The predecessor, or null, if no predecessor has been set.

getOperator

public org.apache.flink.api.common.operators.GenericDataSinkBase<?> getOperator()

Gets the operator for which this optimizer sink node was created.

覆盖:

getOperator 在类中 OptimizerNode

返回:

The node's underlying operator.

getOperatorName

public String getOperatorName()

从类复制的说明: OptimizerNode

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

指定者:

getOperatorName 在类中 OptimizerNode

返回:

The node name.

getIncomingConnections

public List<DagConnection> getIncomingConnections()

从类复制的说明: OptimizerNode

Gets all incoming connections of this node. This method needs to be overridden by subclasses to return the children.

指定者:

getIncomingConnections 在类中 OptimizerNode

返回:

The list of incoming connections.

getOutgoingConnections

public List<DagConnection> getOutgoingConnections()

Gets all outgoing connections, which is an empty set for the data sink.

覆盖:

getOutgoingConnections 在类中 OptimizerNode

返回:

An empty list.

setInput

public void setInput(Map<org.apache.flink.api.common.operators.Operator<?>,OptimizerNode> contractToNode,
                     org.apache.flink.api.common.ExecutionMode defaultExchangeMode)

从类复制的说明: OptimizerNode

This function connects the predecessors to this operator.

指定者:

setInput 在类中 OptimizerNode

参数:

contractToNode - The map from program operators to optimizer nodes.

defaultExchangeMode - The data exchange mode to use, if the operator does not specify one.

computeOperatorSpecificDefaultEstimates

protected void computeOperatorSpecificDefaultEstimates(DataStatistics statistics)

Computes the estimated outputs for the data sink. Since the sink does not modify anything, it simply copies the output estimates from its direct predecessor.

指定者:

computeOperatorSpecificDefaultEstimates 在类中 OptimizerNode

computeInterestingPropertiesForInputs

public void computeInterestingPropertiesForInputs(CostEstimator estimator)

从类复制的说明: OptimizerNode

Tells the node to compute the interesting properties for its inputs. The interesting properties for the node itself must have been computed before. The node must then see how many of interesting properties it preserves and add its own.

指定者:

computeInterestingPropertiesForInputs 在类中 OptimizerNode

参数:

estimator - The CostEstimator instance to use for plan cost estimation.

computeUnclosedBranchStack

public void computeUnclosedBranchStack()

从类复制的说明: 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.

指定者:

computeUnclosedBranchStack 在类中 OptimizerNode

getBranchesForParent

protected List<OptimizerNode.UnclosedBranchDescriptor> getBranchesForParent(DagConnection parent)

覆盖:

getBranchesForParent 在类中 OptimizerNode

getAlternativePlans

public List<PlanNode> getAlternativePlans(CostEstimator estimator)

从类复制的说明: OptimizerNode

Computes the plan alternatives for this node, an implicitly for all nodes that are children of this node. This method must determine for each alternative the global and local properties and the costs. This method may recursively call getAlternatives() on its children to get their plan alternatives, and build its own alternatives on top of those.

指定者:

getAlternativePlans 在类中 OptimizerNode

参数:

estimator - The cost estimator used to estimate the costs of each plan alternative.

返回:

A list containing all plan alternatives.

getSemanticProperties

public org.apache.flink.api.common.operators.SemanticProperties getSemanticProperties()

指定者:

getSemanticProperties 在类中 OptimizerNode

accept

public void accept(org.apache.flink.util.Visitor<OptimizerNode> visitor)

从类复制的说明: OptimizerNode

This method implements the visit of a depth-first graph traversing visitor. Implementers must first call the preVisit() method, then hand the visitor to their children, and finally call the postVisit() method.

指定者:

accept 在接口中 org.apache.flink.util.Visitable<OptimizerNode>

指定者:

accept 在类中 OptimizerNode

参数:

visitor - The graph traversing visitor.

另请参阅:

Visitable.accept(org.apache.flink.util.Visitor)