com.facebook.presto.spi.plan

Class AggregationNode

java.lang.Object

com.facebook.presto.spi.plan.PlanNode

com.facebook.presto.spi.plan.AggregationNode

@Immutable
public final class AggregationNode
extends PlanNode

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	AggregationNode.Aggregation
static class	AggregationNode.GroupingSetDescriptor
static class	AggregationNode.Step

Constructor Summary

Constructors

Constructor and Description
AggregationNode(Optional<SourceLocation> sourceLocation, PlanNodeId id, Optional<PlanNode> statsEquivalentPlanNode, PlanNode source, Map<VariableReferenceExpression,AggregationNode.Aggregation> aggregations, AggregationNode.GroupingSetDescriptor groupingSets, List<VariableReferenceExpression> preGroupedVariables, AggregationNode.Step step, Optional<VariableReferenceExpression> hashVariable, Optional<VariableReferenceExpression> groupIdVariable)
AggregationNode(Optional<SourceLocation> sourceLocation, PlanNodeId id, PlanNode source, Map<VariableReferenceExpression,AggregationNode.Aggregation> aggregations, AggregationNode.GroupingSetDescriptor groupingSets, List<VariableReferenceExpression> preGroupedVariables, AggregationNode.Step step, Optional<VariableReferenceExpression> hashVariable, Optional<VariableReferenceExpression> groupIdVariable)

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
LogicalProperties	computeLogicalProperties(LogicalPropertiesProvider logicalPropertiesProvider) Logical properties are a function of source properties and the operation performed by the plan node
boolean	equals(Object o)
Map<VariableReferenceExpression,AggregationNode.Aggregation>	getAggregations()
Set<Integer>	getGlobalGroupingSets()
Optional<VariableReferenceExpression>	getGroupIdVariable()
List<VariableReferenceExpression>	getGroupingKeys()
int	getGroupingSetCount()
AggregationNode.GroupingSetDescriptor	getGroupingSets()
Optional<VariableReferenceExpression>	getHashVariable()
List<VariableReferenceExpression>	getOutputVariables() The output from the upstream PlanNodes.
List<VariableReferenceExpression>	getPreGroupedVariables()
PlanNode	getSource()
List<PlanNode>	getSources() Get the upstream PlanNodes (i.e., children) of the current PlanNode.
AggregationNode.Step	getStep()
static AggregationNode.GroupingSetDescriptor	globalAggregation()
static AggregationNode.GroupingSetDescriptor	groupingSets(List<VariableReferenceExpression> groupingKeys, int groupingSetCount, Set<Integer> globalGroupingSets)
boolean	hasDefaultOutput()
boolean	hasEmptyGroupingSet()
int	hashCode()
boolean	hasNonEmptyGroupingSet()
boolean	hasOrderings()
static boolean	isDistinct(AggregationNode node) Whether this node corresponds to a DISTINCT operation in SQL
boolean	isSegmentedAggregationEligible()
boolean	isStreamable()
PlanNode	replaceChildren(List<PlanNode> newChildren) Alter the upstream PlanNodes of the current PlanNode.
static AggregationNode.GroupingSetDescriptor	singleGroupingSet(List<VariableReferenceExpression> groupingKeys)

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

getId, getSourceLocation, getStatsEquivalentPlanNode

Methods inherited from class java.lang.Object

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

Constructor Detail

AggregationNode

public AggregationNode(Optional<SourceLocation> sourceLocation,
                       PlanNodeId id,
                       PlanNode source,
                       Map<VariableReferenceExpression,AggregationNode.Aggregation> aggregations,
                       AggregationNode.GroupingSetDescriptor groupingSets,
                       List<VariableReferenceExpression> preGroupedVariables,
                       AggregationNode.Step step,
                       Optional<VariableReferenceExpression> hashVariable,
                       Optional<VariableReferenceExpression> groupIdVariable)

AggregationNode

public AggregationNode(Optional<SourceLocation> sourceLocation,
                       PlanNodeId id,
                       Optional<PlanNode> statsEquivalentPlanNode,
                       PlanNode source,
                       Map<VariableReferenceExpression,AggregationNode.Aggregation> aggregations,
                       AggregationNode.GroupingSetDescriptor groupingSets,
                       List<VariableReferenceExpression> preGroupedVariables,
                       AggregationNode.Step step,
                       Optional<VariableReferenceExpression> hashVariable,
                       Optional<VariableReferenceExpression> groupIdVariable)

Method Detail

isDistinct

public static boolean isDistinct(AggregationNode node)

Whether this node corresponds to a DISTINCT operation in SQL

getGroupingKeys

public List<VariableReferenceExpression> getGroupingKeys()

getGroupingSets

public AggregationNode.GroupingSetDescriptor getGroupingSets()

hasDefaultOutput

public boolean hasDefaultOutput()

Returns:

whether this node should produce default output in case of no input pages. For example for query:

SELECT count(*) FROM nation WHERE nationkey < 0

A default output of "0" is expected to be produced by FINAL aggregation operator.

hasEmptyGroupingSet

public boolean hasEmptyGroupingSet()

hasNonEmptyGroupingSet

public boolean hasNonEmptyGroupingSet()

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

computeLogicalProperties

public LogicalProperties computeLogicalProperties(LogicalPropertiesProvider logicalPropertiesProvider)

Description copied from class: PlanNode

Logical properties are a function of source properties and the operation performed by the plan node

Overrides:

computeLogicalProperties in class PlanNode

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

getAggregations

public Map<VariableReferenceExpression,AggregationNode.Aggregation> getAggregations()

getPreGroupedVariables

public List<VariableReferenceExpression> getPreGroupedVariables()

getGroupingSetCount

public int getGroupingSetCount()

getGlobalGroupingSets

public Set<Integer> getGlobalGroupingSets()

getSource

public PlanNode getSource()

getStep

public AggregationNode.Step getStep()

getHashVariable

public Optional<VariableReferenceExpression> getHashVariable()

getGroupIdVariable

public Optional<VariableReferenceExpression> getGroupIdVariable()

hasOrderings

public boolean hasOrderings()

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

isStreamable

public boolean isStreamable()

isSegmentedAggregationEligible

public boolean isSegmentedAggregationEligible()

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

globalAggregation

public static AggregationNode.GroupingSetDescriptor globalAggregation()

singleGroupingSet

public static AggregationNode.GroupingSetDescriptor singleGroupingSet(List<VariableReferenceExpression> groupingKeys)

groupingSets

public static AggregationNode.GroupingSetDescriptor groupingSets(List<VariableReferenceExpression> groupingKeys,
                                                                 int groupingSetCount,
                                                                 Set<Integer> globalGroupingSets)