AggregateFunction (apache-cassandra API)

All Superinterfaces:

AssignmentTestable, Function

All Known Implementing Classes:

AggregateFcts.CountRowsFunction, NativeAggregateFunction, UDAggregate
```
public interface AggregateFunction
extends Function
```
Performs a calculation on a set of values and return a single value.

- Nested Class Summary
  
  Nested Classes
  Modifier and Type Interface Description
  
  static interface AggregateFunction.Aggregate
  An aggregation operation.
  - Nested classes/interfaces inherited from interface org.apache.cassandra.cql3.AssignmentTestable
    AssignmentTestable.TestResult
- Field Summary
  - Fields inherited from interface org.apache.cassandra.cql3.functions.Function
    UNRESOLVED
- Method Summary
  
  All Methods Instance Methods Abstract Methods
  Modifier and Type Method Description
  
  AggregateFunction.Aggregate newAggregate()
  Creates a new Aggregate instance.
  - Methods inherited from interface org.apache.cassandra.cql3.AssignmentTestable
    getCompatibleTypeIfKnown, testAssignment
  - Methods inherited from interface org.apache.cassandra.cql3.functions.Function
    addFunctionsTo, argTypes, columnName, compare, isAggregate, isNative, isPure, name, newArguments, referencesUserType, returnType

- Method Detail
  - newAggregate
```
AggregateFunction.Aggregate newAggregate()
                                  throws InvalidRequestException
```
    Creates a new Aggregate instance.
    
    Returns:
    
    a new Aggregate instance.
    
    Throws:
    
    InvalidRequestException