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, DistinctLimitStatsRule, EnforceSingleRowStatsRule, ExchangeStatsRule, FilterProjectAggregationStatsRule, FilterStatsRule, JoinStatsRule, LimitStatsRule, ProjectStatsRule, RemoteSourceStatsRule, 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
final Optional<PlanNodeStatsEstimate>	calculate(T node, StatsCalculator.Context context)
protected abstract Optional<PlanNodeStatsEstimate>	doCalculate(T node, StatsCalculator.Context context)

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 Details

SimpleStatsRule

protected SimpleStatsRule(StatsNormalizer normalizer)

Method Details

calculate

public final Optional<PlanNodeStatsEstimate> calculate(T node,
 StatsCalculator.Context context)

Specified by:

calculate in interface ComposableStatsCalculator.Rule<T extends PlanNode>

doCalculate

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