org.apache.flink.table.planner.functions.aggfunctions

Class InternalAggregateFunction<T,ACC>

java.lang.Object

org.apache.flink.table.functions.UserDefinedFunction

org.apache.flink.table.functions.ImperativeAggregateFunction<T,ACC>

org.apache.flink.table.functions.AggregateFunction<T,ACC>

org.apache.flink.table.planner.functions.aggfunctions.InternalAggregateFunction<T,ACC>

All Implemented Interfaces:

Serializable, org.apache.flink.table.functions.FunctionDefinition

Direct Known Subclasses:

CollectAggFunction, FirstValueAggFunction, FirstValueWithRetractAggFunction, LastValueAggFunction, LastValueWithRetractAggFunction, ListAggWithRetractAggFunction, ListAggWsWithRetractAggFunction, MaxWithRetractAggFunction, MinWithRetractAggFunction

@Internal
public abstract class InternalAggregateFunction<T,ACC>
extends org.apache.flink.table.functions.AggregateFunction<T,ACC>

Base class for fully resolved and strongly typed AggregateFunctions provided by AggFunctionFactory.

We override getTypeInference(DataTypeFactory) in case the internal function is used externally for testing.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
InternalAggregateFunction()

Method Summary

Modifier and Type	Method and Description
abstract org.apache.flink.table.types.DataType	getAccumulatorDataType()
abstract org.apache.flink.table.types.DataType[]	getInputDataTypes()
abstract org.apache.flink.table.types.DataType	getOutputDataType()
org.apache.flink.table.types.inference.TypeInference	getTypeInference(org.apache.flink.table.catalog.DataTypeFactory typeFactory)

Methods inherited from class org.apache.flink.table.functions.AggregateFunction

getKind, getValue

Methods inherited from class org.apache.flink.table.functions.ImperativeAggregateFunction

createAccumulator, getAccumulatorType, getResultType

Methods inherited from class org.apache.flink.table.functions.UserDefinedFunction

close, functionIdentifier, open, toString

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.apache.flink.table.functions.FunctionDefinition

getRequirements, isDeterministic

Constructor Detail

InternalAggregateFunction

public InternalAggregateFunction()

Method Detail

getInputDataTypes

public abstract org.apache.flink.table.types.DataType[] getInputDataTypes()

getAccumulatorDataType

public abstract org.apache.flink.table.types.DataType getAccumulatorDataType()

getOutputDataType

public abstract org.apache.flink.table.types.DataType getOutputDataType()

getTypeInference

public org.apache.flink.table.types.inference.TypeInference getTypeInference(org.apache.flink.table.catalog.DataTypeFactory typeFactory)

Specified by:

getTypeInference in interface org.apache.flink.table.functions.FunctionDefinition

Overrides:

getTypeInference in class org.apache.flink.table.functions.AggregateFunction<T,ACC>