Package org.apache.cassandra.cql3.functions

Class NativeAggregateFunction

java.lang.Object

org.apache.cassandra.cql3.functions.AbstractFunction

org.apache.cassandra.cql3.functions.NativeFunction

org.apache.cassandra.cql3.functions.NativeAggregateFunction

All Implemented Interfaces:

AssignmentTestable, AggregateFunction, Function

Direct Known Subclasses:

AggregateFcts.CountRowsFunction

public abstract class NativeAggregateFunction
extends NativeFunction
implements AggregateFunction

Base class for the AggregateFunction native classes.

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.cassandra.cql3.functions.AggregateFunction

AggregateFunction.Aggregate

Nested classes/interfaces inherited from interface org.apache.cassandra.cql3.AssignmentTestable

AssignmentTestable.TestResult

Field Summary

Fields inherited from class org.apache.cassandra.cql3.functions.AbstractFunction

argTypes, name, returnType

Fields inherited from interface org.apache.cassandra.cql3.functions.Function

UNRESOLVED

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	NativeAggregateFunction(String name, AbstractType<?> returnType, AbstractType<?>... argTypes)

Method Summary

Modifier and Type	Method	Description
final boolean	isAggregate()	Checks whether the function is an aggregate function or not.

Methods inherited from class org.apache.cassandra.cql3.functions.NativeFunction

isNative, isPure, newArguments, withLegacyName

Methods inherited from class org.apache.cassandra.cql3.functions.AbstractFunction

addFunctionsTo, argTypes, argumentsList, columnName, elementKeyspace, elementName, equals, getCompatibleTypeIfKnown, hashCode, name, referencesUserType, returnType, testAssignment, toCqlString, toString, typesMatch

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.apache.cassandra.cql3.functions.AggregateFunction

newAggregate

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, isNative, isPure, name, newArguments, referencesUserType, returnType

Constructor Details

NativeAggregateFunction

protected NativeAggregateFunction(String name,
 AbstractType<?> returnType,
 AbstractType<?>... argTypes)

Method Details

isAggregate

public final boolean isAggregate()

Description copied from interface: Function

Checks whether the function is an aggregate function or not.

Specified by:

isAggregate in interface Function

Returns:

true if the function is an aggregate function, false otherwise.