com.facebook.presto.spi.plan

Class MarkDistinctNode

java.lang.Object

com.facebook.presto.spi.plan.PlanNode

com.facebook.presto.spi.plan.MarkDistinctNode

@Immutable
public final class MarkDistinctNode
extends PlanNode

Constructor Summary

Constructors

Constructor and Description
MarkDistinctNode(Optional<SourceLocation> sourceLocation, PlanNodeId id, Optional<PlanNode> statsEquivalentPlanNode, PlanNode source, VariableReferenceExpression markerVariable, List<VariableReferenceExpression> distinctVariables, Optional<VariableReferenceExpression> hashVariable)
MarkDistinctNode(Optional<SourceLocation> sourceLocation, PlanNodeId id, PlanNode source, VariableReferenceExpression markerVariable, List<VariableReferenceExpression> distinctVariables, Optional<VariableReferenceExpression> hashVariable)

Method Summary

Modifier and Type	Method and Description
<R,C> R	accept(PlanVisitor<R,C> visitor, C context) A visitor pattern interface to operate on IR.
PlanNode	assignStatsEquivalentPlanNode(Optional<PlanNode> statsEquivalentPlanNode) Assigns statsEquivalentPlanNode to the plan node
List<VariableReferenceExpression>	getDistinctVariables()
Optional<VariableReferenceExpression>	getHashVariable()
VariableReferenceExpression	getMarkerVariable()
List<VariableReferenceExpression>	getOutputVariables() The output from the upstream PlanNodes.
PlanNode	getSource()
List<PlanNode>	getSources() Get the upstream PlanNodes (i.e., children) of the current PlanNode.
PlanNode	replaceChildren(List<PlanNode> newChildren) Alter the upstream PlanNodes of the current PlanNode.

Methods inherited from class com.facebook.presto.spi.plan.PlanNode

computeLogicalProperties, getId, getSourceLocation, getStatsEquivalentPlanNode

Methods inherited from class java.lang.Object

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

Constructor Detail

MarkDistinctNode

public MarkDistinctNode(Optional<SourceLocation> sourceLocation,
                        PlanNodeId id,
                        PlanNode source,
                        VariableReferenceExpression markerVariable,
                        List<VariableReferenceExpression> distinctVariables,
                        Optional<VariableReferenceExpression> hashVariable)

MarkDistinctNode

public MarkDistinctNode(Optional<SourceLocation> sourceLocation,
                        PlanNodeId id,
                        Optional<PlanNode> statsEquivalentPlanNode,
                        PlanNode source,
                        VariableReferenceExpression markerVariable,
                        List<VariableReferenceExpression> distinctVariables,
                        Optional<VariableReferenceExpression> hashVariable)

Method Detail

getOutputVariables

public List<VariableReferenceExpression> getOutputVariables()

Description copied from class: PlanNode

The output from the upstream PlanNodes. It should serve as the input for the current PlanNode.

Specified by:

getOutputVariables in class PlanNode

getSources

public List<PlanNode> getSources()

Description copied from class: PlanNode

Get the upstream PlanNodes (i.e., children) of the current PlanNode.

Specified by:

getSources in class PlanNode

getSource

public PlanNode getSource()

getMarkerVariable

public VariableReferenceExpression getMarkerVariable()

getDistinctVariables

public List<VariableReferenceExpression> getDistinctVariables()

getHashVariable

public Optional<VariableReferenceExpression> getHashVariable()

accept

public <R,C> R accept(PlanVisitor<R,C> visitor,
                      C context)

Description copied from class: PlanNode

A visitor pattern interface to operate on IR.

Overrides:

accept in class PlanNode

assignStatsEquivalentPlanNode

public PlanNode assignStatsEquivalentPlanNode(Optional<PlanNode> statsEquivalentPlanNode)

Description copied from class: PlanNode

Assigns statsEquivalentPlanNode to the plan node

Specified by:

assignStatsEquivalentPlanNode in class PlanNode

replaceChildren

public PlanNode replaceChildren(List<PlanNode> newChildren)

Description copied from class: PlanNode

Alter the upstream PlanNodes of the current PlanNode.

Specified by:

replaceChildren in class PlanNode