Aggregate

java.lang.Object
- org.apache.iceberg.expressions.Aggregate<C>

All Implemented Interfaces:

java.io.Serializable, Expression

Direct Known Subclasses:

BoundAggregate, UnboundAggregate
```
public abstract class Aggregate<C extends Term>
extends java.lang.Object
implements Expression
```
The aggregate functions that can be pushed and evaluated in Iceberg. Currently only three aggregate functions Max, Min and Count are supported.

See Also:

Serialized Form

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

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`Expression.Operation`	`op()`	Returns the operation for an expression node.
`C`	`term()`
`java.lang.String`	`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

- Method Detail
  - op
```
public Expression.Operation op()
```
    Description copied from interface: Expression
    
    Returns the operation for an expression node.
    
    Specified by:
    
    op in interface Expression
  - term
```
public C term()
```
  - toString
```
public java.lang.String toString()
```
    Overrides:
    
    toString in class java.lang.Object