Package io.trino.cost

Class AggregationStatsRule

java.lang.Object

io.trino.cost.SimpleStatsRule<AggregationNode>

io.trino.cost.AggregationStatsRule

All Implemented Interfaces:

ComposableStatsCalculator.Rule<AggregationNode>

public class AggregationStatsRule
extends SimpleStatsRule<AggregationNode>

Constructor Summary

Constructors

Constructor	Description
AggregationStatsRule(StatsNormalizer normalizer)

Method Summary

Modifier and Type	Method	Description
protected Optional<PlanNodeStatsEstimate>	doCalculate(AggregationNode node, StatsCalculator.Context context)
Pattern<AggregationNode>	getPattern()
static double	getRowsCount(PlanNodeStatsEstimate sourceStats, Collection<Symbol> groupBySymbols)
static PlanNodeStatsEstimate	groupBy(PlanNodeStatsEstimate sourceStats, Collection<Symbol> groupBySymbols, Map<Symbol,AggregationNode.Aggregation> aggregations)

Methods inherited from class io.trino.cost.SimpleStatsRule

calculate

Methods inherited from class java.lang.Object

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

Constructor Details

AggregationStatsRule

public AggregationStatsRule(StatsNormalizer normalizer)

Method Details

getPattern

public Pattern<AggregationNode> getPattern()

doCalculate

protected Optional<PlanNodeStatsEstimate> doCalculate(AggregationNode node,
 StatsCalculator.Context context)

Specified by:

doCalculate in class SimpleStatsRule<AggregationNode>

groupBy

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

getRowsCount

public static double getRowsCount(PlanNodeStatsEstimate sourceStats,
 Collection<Symbol> groupBySymbols)