org.apache.flink.optimizer.dag

Class BinaryUnionNode

java.lang.Object

org.apache.flink.optimizer.dag.OptimizerNode

org.apache.flink.optimizer.dag.TwoInputNode

org.apache.flink.optimizer.dag.BinaryUnionNode

All Implemented Interfaces:

EstimateProvider, DumpableNode<OptimizerNode>, Visitable<OptimizerNode>

public class BinaryUnionNode
extends TwoInputNode

The Optimizer representation of a binary Union.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	BinaryUnionNode.UnionSemanticProperties

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
BinaryUnionNode(Union<?> union)

Method Summary

Methods

Modifier and Type	Method and Description
void	computeInterestingPropertiesForInputs(CostEstimator estimator) Tells the node to compute the interesting properties for its inputs.
protected void	computeOperatorSpecificDefaultEstimates(DataStatistics statistics)
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	computeUnionOfInterestingPropertiesFromSuccessors() Computes all the interesting properties that are relevant to this node.
List<PlanNode>	getAlternativePlans(CostEstimator estimator) Computes the plan alternatives for this node, an implicitly for all nodes that are children of this 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()
SemanticProperties	getSemanticProperties()
protected void	readStubAnnotations() Reads all stub annotations, i.e.

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

accept, addLocalCandidates, computeUnclosedBranchStack, getFirstIncomingConnection, getFirstPredecessorNode, getIncomingConnections, getOperator, getSecondIncomingConnection, getSecondPredecessorNode, getSemanticPropertiesForGlobalPropertyFiltering, getSemanticPropertiesForLocalPropertyFiltering, instantiate, placePipelineBreakersIfNecessary, setInput

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

addBroadcastConnection, addClosedBranch, addClosedBranches, addOutgoingConnection, areBranchCompatible, clearInterestingProperties, computeUnclosedBranchStackForBroadcastInputs, 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, 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

BinaryUnionNode

public BinaryUnionNode(Union<?> union)

Method Detail

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

computeOperatorSpecificDefaultEstimates

protected void computeOperatorSpecificDefaultEstimates(DataStatistics statistics)

Specified by:

computeOperatorSpecificDefaultEstimates in class OptimizerNode

computeUnionOfInterestingPropertiesFromSuccessors

public void computeUnionOfInterestingPropertiesFromSuccessors()

Description copied from class: OptimizerNode

Computes all the interesting properties that are relevant to this node. The interesting properties are a union of the interesting properties on each outgoing connection. However, if two interesting properties on the outgoing connections overlap, the interesting properties will occur only once in this set. For that, this method deduplicates and merges the interesting properties. This method returns copies of the original interesting properties objects and leaves the original objects, contained by the connections, unchanged.

Overrides:

computeUnionOfInterestingPropertiesFromSuccessors in class OptimizerNode

computeInterestingPropertiesForInputs

public void computeInterestingPropertiesForInputs(CostEstimator estimator)

Description copied from class: 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.

Overrides:

computeInterestingPropertiesForInputs in class TwoInputNode

Parameters:

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

getAlternativePlans

public List<PlanNode> getAlternativePlans(CostEstimator estimator)

Description copied from class: 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.

Overrides:

getAlternativePlans in class TwoInputNode

Parameters:

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

Returns:

A list containing all plan alternatives.

readStubAnnotations

protected void readStubAnnotations()

Description copied from class: OptimizerNode

Reads all stub annotations, i.e. which fields remain constant, what cardinality bounds the functions have, which fields remain unique.

Overrides:

readStubAnnotations in class OptimizerNode

getSemanticProperties

public SemanticProperties getSemanticProperties()

Overrides:

getSemanticProperties in class TwoInputNode

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.