Package org.apache.flink.table.planner.plan.nodes.exec

Class ExecEdge

java.lang.Object

org.apache.flink.table.planner.plan.nodes.exec.ExecEdge

public class ExecEdge
extends Object

The representation of an edge connecting two ExecNodes.

The edge's json serialization/deserialization will be delegated to JsonPlanEdge, which only stores the ExecNode's id instead of instance.

JsonPlanEdge should also be updated with this class if the fields are added/removed.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	ExecEdge.Builder	Builder of the ExecEdge.
static class	ExecEdge.HashShuffle	Records are shuffled by hash when passing through this edge.
static class	ExecEdge.Shuffle	The ExecEdge.Shuffle defines how to exchange the records between ExecNodes.

Field Summary

Fields

Modifier and Type	Field	Description
static ExecEdge.Shuffle	ANY_SHUFFLE	Any type of shuffle is OK when passing through this edge.
static ExecEdge.Shuffle	BROADCAST_SHUFFLE	Full records are provided for each parallelism of the target node.
static ExecEdge.Shuffle	FORWARD_SHUFFLE	Records are shuffled in same parallelism (function call).
static ExecEdge.Shuffle	SINGLETON_SHUFFLE	The parallelism of the target node must be 1.

Constructor Summary

Constructors

Constructor	Description
ExecEdge(ExecNode<?> source, ExecNode<?> target, ExecEdge.Shuffle shuffle, StreamExchangeMode exchangeMode)

Method Summary

Modifier and Type	Method	Description
static ExecEdge.Builder	builder()
StreamExchangeMode	getExchangeMode()
LogicalType	getOutputType()	Returns the output LogicalType of the data passing this edge.
ExecEdge.Shuffle	getShuffle()
ExecNode<?>	getSource()
ExecNode<?>	getTarget()
static ExecEdge.Shuffle	hashShuffle(int[] keys)	Return hash ExecEdge.Shuffle.
String	toString()
OpFusionCodegenSpecGenerator	translateToFusionCodegenSpec(Planner planner, org.apache.flink.table.planner.codegen.CodeGeneratorContext parentCtx)	Translates this edge into operator fusion codegen spec generator.
Transformation<?>	translateToPlan(Planner planner)	Translates this edge into a Flink operator.

Methods inherited from class java.lang.Object

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

Field Detail

ANY_SHUFFLE

public static final ExecEdge.Shuffle ANY_SHUFFLE

Any type of shuffle is OK when passing through this edge.

BROADCAST_SHUFFLE

public static final ExecEdge.Shuffle BROADCAST_SHUFFLE

Full records are provided for each parallelism of the target node.

SINGLETON_SHUFFLE

public static final ExecEdge.Shuffle SINGLETON_SHUFFLE

The parallelism of the target node must be 1.

FORWARD_SHUFFLE

public static final ExecEdge.Shuffle FORWARD_SHUFFLE

Records are shuffled in same parallelism (function call).

Constructor Detail

ExecEdge

public ExecEdge(ExecNode<?> source,
                ExecNode<?> target,
                ExecEdge.Shuffle shuffle,
                StreamExchangeMode exchangeMode)

Method Detail

getSource

public ExecNode<?> getSource()

getTarget

public ExecNode<?> getTarget()

getShuffle

public ExecEdge.Shuffle getShuffle()

getExchangeMode

public StreamExchangeMode getExchangeMode()

getOutputType

public LogicalType getOutputType()

Returns the output LogicalType of the data passing this edge.

toString

public String toString()

Overrides:

toString in class Object

builder

public static ExecEdge.Builder builder()

hashShuffle

public static ExecEdge.Shuffle hashShuffle(int[] keys)

Return hash ExecEdge.Shuffle.

Parameters:

keys - hash keys

translateToPlan

public Transformation<?> translateToPlan(Planner planner)

Translates this edge into a Flink operator.

Parameters:

planner - The Planner of the translated Table.

translateToFusionCodegenSpec

public OpFusionCodegenSpecGenerator translateToFusionCodegenSpec(Planner planner,
                                                                 org.apache.flink.table.planner.codegen.CodeGeneratorContext parentCtx)

Translates this edge into operator fusion codegen spec generator.

Parameters:

planner - The Planner of the translated Table.

parentCtx - Parent CodeGeneratorContext.