Package io.trino.cost

Class SimpleStatsRule<T extends PlanNode>

java.lang.Object

io.trino.cost.SimpleStatsRule<T>

All Implemented Interfaces:

ComposableStatsCalculator.Rule<T>

Direct Known Subclasses:

AggregationStatsRule, EnforceSingleRowStatsRule, ExchangeStatsRule, FilterStatsRule, JoinStatsRule, LimitStatsRule, ProjectStatsRule, RowNumberStatsRule, SampleStatsRule, SimpleFilterProjectSemiJoinStatsRule, SpatialJoinStatsRule, TableScanStatsRule, TopNStatsRule, UnionStatsRule

public abstract class SimpleStatsRule<T extends PlanNode>
extends Object
implements ComposableStatsCalculator.Rule<T>

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	SimpleStatsRule(StatsNormalizer normalizer)

Method Summary

Modifier and Type	Method	Description
Optional<PlanNodeStatsEstimate>	calculate(T node, StatsProvider sourceStats, Lookup lookup, Session session, TypeProvider types)
protected abstract Optional<PlanNodeStatsEstimate>	doCalculate(T node, StatsProvider sourceStats, Lookup lookup, Session session, TypeProvider types)

Methods inherited from class java.lang.Object

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

Methods inherited from interface io.trino.cost.ComposableStatsCalculator.Rule

getPattern

Constructor Detail

SimpleStatsRule

protected SimpleStatsRule(StatsNormalizer normalizer)

Method Detail

calculate

public final Optional<PlanNodeStatsEstimate> calculate(T node,
                                                       StatsProvider sourceStats,
                                                       Lookup lookup,
                                                       Session session,
                                                       TypeProvider types)

Specified by:

calculate in interface ComposableStatsCalculator.Rule<T extends PlanNode>

doCalculate

protected abstract Optional<PlanNodeStatsEstimate> doCalculate(T node,
                                                               StatsProvider sourceStats,
                                                               Lookup lookup,
                                                               Session session,
                                                               TypeProvider types)