RuleQueue.PhaseMatchList (Apache Calcite API)

java.lang.Object
- org.apache.calcite.plan.volcano.RuleQueue.PhaseMatchList

Enclosing class:

RuleQueue
```
private static class RuleQueue.PhaseMatchList
extends java.lang.Object
```
PhaseMatchList represents a set of rule-matches for a particular phase of the planner's execution.

Field Summary

Fields
Modifier and Type	Field	Description
`(package private) java.util.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) java.util.Set<java.lang.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 Description

PhaseMatchList(VolcanoPlannerPhase phase)

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type Method 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 java.util.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 java.util.Set<java.lang.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()
```