Package io.prestosql.cost

Class SimpleFilterProjectSemiJoinStatsRule

java.lang.Object

io.prestosql.cost.SimpleStatsRule<FilterNode>

io.prestosql.cost.SimpleFilterProjectSemiJoinStatsRule

All Implemented Interfaces:

ComposableStatsCalculator.Rule<FilterNode>

public class SimpleFilterProjectSemiJoinStatsRule
extends SimpleStatsRule<FilterNode>

It is not yet proven whether this heuristic is any better or worse. Either this rule will be enhanced in the future or it will be dropped altogether.

Constructor Summary

Constructors

Constructor	Description
SimpleFilterProjectSemiJoinStatsRule(Metadata metadata, StatsNormalizer normalizer, FilterStatsCalculator filterStatsCalculator)

Method Summary

Modifier and Type	Method	Description
protected Optional<PlanNodeStatsEstimate>	doCalculate(FilterNode node, StatsProvider sourceStats, Lookup lookup, Session session, TypeProvider types)
Pattern<FilterNode>	getPattern()

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

SimpleFilterProjectSemiJoinStatsRule

public SimpleFilterProjectSemiJoinStatsRule(Metadata metadata,
                                            StatsNormalizer normalizer,
                                            FilterStatsCalculator filterStatsCalculator)

Method Detail

getPattern

public Pattern<FilterNode> getPattern()

doCalculate

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

Specified by:

doCalculate in class SimpleStatsRule<FilterNode>