org.apache.flink.table.runtime.functions.aggregate

类 CollectAggFunction<T>

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.runtime.functions.aggregate.BuiltInAggregateFunction<org.apache.flink.table.data.MapData,CollectAggFunction.CollectAccumulator<T>>

org.apache.flink.table.runtime.functions.aggregate.CollectAggFunction<T>

所有已实现的接口:

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

@Internal
public final class CollectAggFunction<T>
extends BuiltInAggregateFunction<org.apache.flink.table.data.MapData,CollectAggFunction.CollectAccumulator<T>>

Built-in COLLECT aggregate function.

另请参阅:

序列化表格

嵌套类概要

嵌套类

限定符和类型	类和说明
static class	CollectAggFunction.CollectAccumulator<T> Accumulator for COLLECT.

构造器概要

构造器

构造器和说明
CollectAggFunction(org.apache.flink.table.types.logical.LogicalType elementType)

方法概要

限定符和类型	方法和说明
void	accumulate(CollectAggFunction.CollectAccumulator<T> accumulator, T value)
CollectAggFunction.CollectAccumulator<T>	createAccumulator()
org.apache.flink.table.types.DataType	getAccumulatorDataType()
List<org.apache.flink.table.types.DataType>	getArgumentDataTypes()
org.apache.flink.table.types.DataType	getOutputDataType()
org.apache.flink.table.data.MapData	getValue(CollectAggFunction.CollectAccumulator<T> accumulator)
void	merge(CollectAggFunction.CollectAccumulator<T> accumulator, Iterable<CollectAggFunction.CollectAccumulator<T>> others)
void	resetAccumulator(CollectAggFunction.CollectAccumulator<T> accumulator)
void	retract(CollectAggFunction.CollectAccumulator<T> accumulator, T value)

从类继承的方法 org.apache.flink.table.runtime.functions.aggregate.BuiltInAggregateFunction

getRequirements, getTypeInference, isDeterministic

从类继承的方法 org.apache.flink.table.functions.AggregateFunction

getKind

从类继承的方法 org.apache.flink.table.functions.ImperativeAggregateFunction

getAccumulatorType, getResultType

从类继承的方法 org.apache.flink.table.functions.UserDefinedFunction

close, functionIdentifier, open, toString

从类继承的方法 java.lang.Object

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

从接口继承的方法 org.apache.flink.table.functions.FunctionDefinition

supportsConstantFolding

构造器详细资料

CollectAggFunction

public CollectAggFunction(org.apache.flink.table.types.logical.LogicalType elementType)

方法详细资料

getArgumentDataTypes

public List<org.apache.flink.table.types.DataType> getArgumentDataTypes()

覆盖:

getArgumentDataTypes 在类中 BuiltInAggregateFunction<org.apache.flink.table.data.MapData,CollectAggFunction.CollectAccumulator<T>>

getAccumulatorDataType

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

覆盖:

getAccumulatorDataType 在类中 BuiltInAggregateFunction<org.apache.flink.table.data.MapData,CollectAggFunction.CollectAccumulator<T>>

getOutputDataType

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

覆盖:

getOutputDataType 在类中 BuiltInAggregateFunction<org.apache.flink.table.data.MapData,CollectAggFunction.CollectAccumulator<T>>

createAccumulator

public CollectAggFunction.CollectAccumulator<T> createAccumulator()

指定者:

createAccumulator 在类中 org.apache.flink.table.functions.ImperativeAggregateFunction<org.apache.flink.table.data.MapData,CollectAggFunction.CollectAccumulator<T>>

resetAccumulator

public void resetAccumulator(CollectAggFunction.CollectAccumulator<T> accumulator)

accumulate

public void accumulate(CollectAggFunction.CollectAccumulator<T> accumulator,
                       T value)
                throws Exception

抛出:

Exception

retract

public void retract(CollectAggFunction.CollectAccumulator<T> accumulator,
                    T value)
             throws Exception

抛出:

Exception

merge

public void merge(CollectAggFunction.CollectAccumulator<T> accumulator,
                  Iterable<CollectAggFunction.CollectAccumulator<T>> others)
           throws Exception

抛出:

Exception

getValue

public org.apache.flink.table.data.MapData getValue(CollectAggFunction.CollectAccumulator<T> accumulator)

指定者:

getValue 在类中 org.apache.flink.table.functions.AggregateFunction<org.apache.flink.table.data.MapData,CollectAggFunction.CollectAccumulator<T>>