org.apache.calcite.plan.volcano

Class RuleQueue.PhaseMatchList

java.lang.Object

org.apache.calcite.plan.volcano.RuleQueue.PhaseMatchList

Enclosing class:

RuleQueue

private static class RuleQueue.PhaseMatchList
extends Object

PhaseMatchList represents a set of rule-matches for a particular phase of the planner's execution.

Field Summary

Fields

Modifier and Type	Field and Description
(package private) List<VolcanoRuleMatch>	list Current list of VolcanoRuleMatches for this phase.
(package private) com.google.common.collect.Multimap<RelSubset,VolcanoRuleMatch>	matchMap Multi-map of RelSubset to VolcanoRuleMatches.
(package private) Set<String>	names A set of rule-match names contained in list.
(package private) VolcanoPlannerPhase	phase The VolcanoPlannerPhase that this PhaseMatchList is used in.

Constructor Summary

Constructors

Constructor and Description
PhaseMatchList(VolcanoPlannerPhase phase)

Method Summary

Modifier and Type	Method and Description
(package private) void	clear()

Methods inherited from class java.lang.Object

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

Field Detail

phase

final VolcanoPlannerPhase phase

The VolcanoPlannerPhase that this PhaseMatchList is used in.

list

final List<VolcanoRuleMatch> list

Current list of VolcanoRuleMatches for this phase. New rule-matches are appended to the end of this list. When removing a rule-match, the list is sorted and the highest importance rule-match removed. It is important for performance that this list remain mostly sorted.

Use a hunkList because ArrayList does not implement remove(0) efficiently.

names

final Set<String> names

A set of rule-match names contained in list. Allows fast detection of duplicate rule-matches.

matchMap

final com.google.common.collect.Multimap<RelSubset,VolcanoRuleMatch> matchMap

Multi-map of RelSubset to VolcanoRuleMatches. Used to clear the rule-match's cached importance when the importance of a related RelSubset is modified (e.g., due to invocation of RuleQueue.boostImportance(Collection, double)).

Constructor Detail

PhaseMatchList

PhaseMatchList(VolcanoPlannerPhase phase)

Method Detail

clear

void clear()