RexProgram.ReferenceCounter (Apache Calcite API)

java.lang.Object
- org.apache.calcite.rex.RexVisitorImpl<java.lang.Void>
- - org.apache.calcite.rex.RexProgram.ReferenceCounter

All Implemented Interfaces:

RexVisitor<java.lang.Void>

Enclosing class:

RexProgram
```
private class RexProgram.ReferenceCounter
extends RexVisitorImpl<java.lang.Void>
```
Visitor which marks which expressions are used.

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

- Constructor Detail
  - ReferenceCounter
```
ReferenceCounter()
```
- Method Detail
  - visitLocalRef
```
public java.lang.Void visitLocalRef(RexLocalRef localRef)
```
    Specified by:
    
    visitLocalRef in interface RexVisitor<java.lang.Void>
    
    Overrides:
    
    visitLocalRef in class RexVisitorImpl<java.lang.Void>