BoundAggregate

java.lang.Object
- org.apache.iceberg.expressions.Aggregate<BoundTerm<T>>
- - org.apache.iceberg.expressions.BoundAggregate<T,C>

All Implemented Interfaces:

java.io.Serializable, Bound<C>, Expression

Direct Known Subclasses:

CountAggregate, MaxAggregate, MinAggregate
```
public class BoundAggregate<T,C>
extends Aggregate<BoundTerm<T>>
implements Bound<C>
```
See Also:

Serialized Form

Nested Class Summary
- Nested classes/interfaces inherited from interface org.apache.iceberg.expressions.Expression
  Expression.Operation

Constructor Summary

Constructors
Modifier Constructor Description

protected BoundAggregate(Expression.Operation op, BoundTerm<T> term)

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`java.lang.String`	`columnName()`
`java.lang.String`	`describe()`
`C`	`eval(StructLike struct)`	Produce a value from the struct for this expression.
`BoundReference<?>`	`ref()`	Returns the underlying reference.
`Type`	`type()`

Methods inherited from class org.apache.iceberg.expressions.Aggregate
op, term, toString

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.apache.iceberg.expressions.Expression
isEquivalentTo, negate

- Constructor Detail
  - BoundAggregate
```
protected BoundAggregate(Expression.Operation op,
                         BoundTerm<T> term)
```
- Method Detail
  - eval
```
public C eval(StructLike struct)
```
    Description copied from interface: Bound
    
    Produce a value from the struct for this expression.
    
    Specified by:
    
    eval in interface Bound<T>
    
    Parameters:
    
    struct - a struct of incoming data
    
    Returns:
    
    the value of this expression when evaluated on the incoming struct
  - ref
```
public BoundReference<?> ref()
```
    Description copied from interface: Bound
    
    Returns the underlying reference.
    
    Specified by:
    
    ref in interface Bound<T>
  - type
```
public Type type()
```
  - columnName
```
public java.lang.String columnName()
```
  - describe
```
public java.lang.String describe()
```