RuleQueue.RuleMatchImportanceComparator (Apache Calcite API)

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

All Implemented Interfaces:

java.util.Comparator<VolcanoRuleMatch>

Enclosing class:

RuleQueue
```
private static class RuleQueue.RuleMatchImportanceComparator
extends java.lang.Object
implements java.util.Comparator<VolcanoRuleMatch>
```
Compares VolcanoRuleMatch objects according to their importance. Matches which are more important collate earlier. Ties are adjudicated by comparing the ids of the relational expressions matched.

- Constructor Summary
  
  Constructors
  Modifier Constructor Description
  
  private RuleMatchImportanceComparator()
- Method Summary
  
  All Methods Instance Methods Concrete Methods
  Modifier and Type Method Description
  
  int compare(VolcanoRuleMatch match1, VolcanoRuleMatch match2)
  - Methods inherited from class java.lang.Object
    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
  - Methods inherited from interface java.util.Comparator
    equals, reversed, thenComparing, thenComparing, thenComparing, thenComparingDouble, thenComparingInt, thenComparingLong

Constructor Detail
- RuleMatchImportanceComparator
```
private RuleMatchImportanceComparator()
```

Method Detail

compare

public int compare(VolcanoRuleMatch match1,
                   VolcanoRuleMatch match2)

Specified by:: compare in interface java.util.Comparator<VolcanoRuleMatch>