RelMdUtil.CardOfProjExpr (Apache Calcite API)

java.lang.Object
- org.apache.calcite.rex.RexVisitorImpl<java.lang.Double>
- - org.apache.calcite.rel.metadata.RelMdUtil.CardOfProjExpr

All Implemented Interfaces:

RexVisitor<java.lang.Double>

Enclosing class:

RelMdUtil
```
private static class RelMdUtil.CardOfProjExpr
extends RexVisitorImpl<java.lang.Double>
```
Visitor that walks over a scalar expression and computes the cardinality of its result.

Field Summary

Fields
Modifier and Type Field Description

private RelMetadataQuery mq

private Project rel
- Fields inherited from class org.apache.calcite.rex.RexVisitorImpl
  deep

Constructor Summary

Constructors
Constructor Description

CardOfProjExpr(RelMetadataQuery mq, Project rel)

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`java.lang.Double`	`visitCall(RexCall call)`
`java.lang.Double`	`visitInputRef(RexInputRef var)`
`java.lang.Double`	`visitLiteral(RexLiteral literal)`

Methods inherited from class org.apache.calcite.rex.RexVisitorImpl
visitArrayAnd, visitArrayOr, visitCorrelVariable, visitDynamicParam, visitFieldAccess, 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
  - mq
```
private final RelMetadataQuery mq
```
  - rel
```
private Project rel
```
- Constructor Detail
  - CardOfProjExpr
```
CardOfProjExpr(RelMetadataQuery mq,
               Project rel)
```
- Method Detail
  - visitInputRef
```
public java.lang.Double visitInputRef(RexInputRef var)
```
    Specified by:
    
    visitInputRef in interface RexVisitor<java.lang.Double>
    
    Overrides:
    
    visitInputRef in class RexVisitorImpl<java.lang.Double>
  - visitLiteral
```
public java.lang.Double visitLiteral(RexLiteral literal)
```
    Specified by:
    
    visitLiteral in interface RexVisitor<java.lang.Double>
    
    Overrides:
    
    visitLiteral in class RexVisitorImpl<java.lang.Double>
  - visitCall
```
public java.lang.Double visitCall(RexCall call)
```
    Specified by:
    
    visitCall in interface RexVisitor<java.lang.Double>
    
    Overrides:
    
    visitCall in class RexVisitorImpl<java.lang.Double>