Package io.trino.sql.planner.plan

Class AggregationNode

java.lang.Object

io.trino.sql.planner.plan.PlanNode

io.trino.sql.planner.plan.AggregationNode

@Immutable
public class AggregationNode
extends PlanNode

Nested Class Summary

Nested Classes

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

Constructor Summary

Constructors

Constructor	Description
AggregationNode(PlanNodeId id, PlanNode source, Map<Symbol,AggregationNode.Aggregation> aggregations, AggregationNode.GroupingSetDescriptor groupingSets, List<Symbol> preGroupedSymbols, AggregationNode.Step step, Optional<Symbol> hashSymbol, Optional<Symbol> groupIdSymbol)

Method Summary

Modifier and Type	Method	Description
<R, C> R	accept(PlanVisitor<R,C> visitor, C context)
static AggregationNode.Builder	builderFrom(AggregationNode node)
Map<Symbol,AggregationNode.Aggregation>	getAggregations()
Set<Integer>	getGlobalGroupingSets()
Optional<Symbol>	getGroupIdSymbol()
List<Symbol>	getGroupingKeys()
int	getGroupingSetCount()
AggregationNode.GroupingSetDescriptor	getGroupingSets()
Optional<Symbol>	getHashSymbol()
List<Symbol>	getOutputSymbols()
List<Symbol>	getPreGroupedSymbols()
PlanNode	getSource()
List<PlanNode>	getSources()
AggregationNode.Step	getStep()
static AggregationNode.GroupingSetDescriptor	globalAggregation()
static AggregationNode.GroupingSetDescriptor	groupingSets(List<Symbol> groupingKeys, int groupingSetCount, Set<Integer> globalGroupingSets)
boolean	hasDefaultOutput()
boolean	hasEmptyGroupingSet()
boolean	hasNonEmptyGroupingSet()
boolean	hasOrderings()
boolean	hasSingleGlobalAggregation()
boolean	hasSingleNodeExecutionPreference(Session session, Metadata metadata)
boolean	isDecomposable(Session session, Metadata metadata)
boolean	isStreamable()
boolean	producesDistinctRows()
PlanNode	replaceChildren(List<PlanNode> newChildren)
static AggregationNode	singleAggregation(PlanNodeId id, PlanNode source, Map<Symbol,AggregationNode.Aggregation> aggregations, AggregationNode.GroupingSetDescriptor groupingSets)
static AggregationNode.GroupingSetDescriptor	singleGroupingSet(List<Symbol> groupingKeys)

Methods inherited from class io.trino.sql.planner.plan.PlanNode

getId

Methods inherited from class java.lang.Object

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

Constructor Details

AggregationNode

public AggregationNode(PlanNodeId id,
 PlanNode source,
 Map<Symbol,AggregationNode.Aggregation> aggregations,
 AggregationNode.GroupingSetDescriptor groupingSets,
 List<Symbol> preGroupedSymbols,
 AggregationNode.Step step,
 Optional<Symbol> hashSymbol,
 Optional<Symbol> groupIdSymbol)

Method Details

singleAggregation

public static AggregationNode singleAggregation(PlanNodeId id,
 PlanNode source,
 Map<Symbol,AggregationNode.Aggregation> aggregations,
 AggregationNode.GroupingSetDescriptor groupingSets)

getGroupingKeys

public List<Symbol> getGroupingKeys()

getGroupingSets

public AggregationNode.GroupingSetDescriptor getGroupingSets()

hasSingleGlobalAggregation

public boolean hasSingleGlobalAggregation()

Returns:

true if the aggregation collapses all rows into a single global group (e.g., as a result of a GROUP BY () query). Otherwise, false.

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()

Specified by:

getSources in class PlanNode

getOutputSymbols

public List<Symbol> getOutputSymbols()

Specified by:

getOutputSymbols in class PlanNode

getAggregations

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

getPreGroupedSymbols

public List<Symbol> getPreGroupedSymbols()

getGroupingSetCount

public int getGroupingSetCount()

getGlobalGroupingSets

public Set<Integer> getGlobalGroupingSets()

getSource

public PlanNode getSource()

getStep

public AggregationNode.Step getStep()

getHashSymbol

public Optional<Symbol> getHashSymbol()

getGroupIdSymbol

public Optional<Symbol> getGroupIdSymbol()

hasOrderings

public boolean hasOrderings()

accept

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

Overrides:

accept in class PlanNode

replaceChildren

public PlanNode replaceChildren(List<PlanNode> newChildren)

Specified by:

replaceChildren in class PlanNode

producesDistinctRows

public boolean producesDistinctRows()

isDecomposable

public boolean isDecomposable(Session session,
 Metadata metadata)

hasSingleNodeExecutionPreference

public boolean hasSingleNodeExecutionPreference(Session session,
 Metadata metadata)

isStreamable

public boolean isStreamable()

globalAggregation

public static AggregationNode.GroupingSetDescriptor globalAggregation()

singleGroupingSet

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

groupingSets

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

builderFrom

public static AggregationNode.Builder builderFrom(AggregationNode node)