io.prestosql.cost

Class AggregationStatsRule

java.lang.Object

io.prestosql.cost.SimpleStatsRule<AggregationNode>

io.prestosql.cost.AggregationStatsRule

All Implemented Interfaces:

ComposableStatsCalculator.Rule<AggregationNode>

public class AggregationStatsRule
extends SimpleStatsRule<AggregationNode>

Constructor Summary

Constructors

Constructor and Description
AggregationStatsRule(StatsNormalizer normalizer)

Method Summary

Modifier and Type	Method and Description
protected Optional<PlanNodeStatsEstimate>	doCalculate(AggregationNode node, StatsProvider statsProvider, Lookup lookup, Session session, TypeProvider types)
Pattern<AggregationNode>	getPattern()
static PlanNodeStatsEstimate	groupBy(PlanNodeStatsEstimate sourceStats, Collection<Symbol> groupBySymbols, Map<Symbol,AggregationNode.Aggregation> aggregations)

Methods inherited from class io.prestosql.cost.SimpleStatsRule

calculate

Methods inherited from class java.lang.Object

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

Constructor Detail

AggregationStatsRule

public AggregationStatsRule(StatsNormalizer normalizer)

Method Detail

getPattern

public Pattern<AggregationNode> getPattern()

doCalculate

protected Optional<PlanNodeStatsEstimate> doCalculate(AggregationNode node,
                                                      StatsProvider statsProvider,
                                                      Lookup lookup,
                                                      Session session,
                                                      TypeProvider types)

Specified by:

doCalculate in class SimpleStatsRule<AggregationNode>

groupBy

public static PlanNodeStatsEstimate groupBy(PlanNodeStatsEstimate sourceStats,
                                            Collection<Symbol> groupBySymbols,
                                            Map<Symbol,AggregationNode.Aggregation> aggregations)