JoinToMultiJoinRule.InputReferenceCounter (Apache Calcite API)

java.lang.Object
- org.apache.calcite.rex.RexVisitorImpl<java.lang.Void>
- - org.apache.calcite.rel.rules.JoinToMultiJoinRule.InputReferenceCounter

All Implemented Interfaces:

RexVisitor<java.lang.Void>

Enclosing class:

JoinToMultiJoinRule
```
private class JoinToMultiJoinRule.InputReferenceCounter
extends RexVisitorImpl<java.lang.Void>
```
Visitor that keeps a reference count of the inputs used by an expression.

- Field Summary
  
  Fields
  Modifier and Type Field Description
  
  private int[] refCounts
  - Fields inherited from class org.apache.calcite.rex.RexVisitorImpl
    deep
- Constructor Summary
  
  Constructors
  Constructor Description
  
  InputReferenceCounter(int[] refCounts)
- Method Summary
  
  All Methods Instance Methods Concrete Methods
  Modifier and Type Method Description
  
  java.lang.Void visitInputRef(RexInputRef inputRef)
  - Methods inherited from class org.apache.calcite.rex.RexVisitorImpl
    visitArrayAnd, visitArrayOr, visitCall, visitCorrelVariable, visitDynamicParam, visitFieldAccess, visitLiteral, visitLocalRef, visitOver, visitPatternFieldRef, visitRangeRef, visitSubQuery, visitTableInputRef
  - Methods inherited from class java.lang.Object
    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - refCounts
```
private final int[] refCounts
```
- Constructor Detail
  - InputReferenceCounter
```
InputReferenceCounter(int[] refCounts)
```
- Method Detail
  - visitInputRef
```
public java.lang.Void visitInputRef(RexInputRef inputRef)
```
    Specified by:
    
    visitInputRef in interface RexVisitor<java.lang.Void>
    
    Overrides:
    
    visitInputRef in class RexVisitorImpl<java.lang.Void>