org.apache.flink.api.scala.operators

类 ScalaAggregateOperator<IN>

java.lang.Object

org.apache.flink.api.java.DataSet<OUT>

org.apache.flink.api.java.operators.Operator<OUT,O>

org.apache.flink.api.java.operators.SingleInputOperator<IN,IN,ScalaAggregateOperator<IN>>

org.apache.flink.api.scala.operators.ScalaAggregateOperator<IN>

类型参数:

IN - The type of the data set aggregated by the operator.

@Public
public class ScalaAggregateOperator<IN>
extends org.apache.flink.api.java.operators.SingleInputOperator<IN,IN,ScalaAggregateOperator<IN>>

This operator represents the application of a "aggregate" operation on a data set, and the result data set produced by the function.

字段概要

从类继承的字段 org.apache.flink.api.java.operators.Operator

minResources, name, parallelism, preferredResources

从类继承的字段 org.apache.flink.api.java.DataSet

context

构造器概要

构造器

构造器和说明
ScalaAggregateOperator(org.apache.flink.api.java.DataSet<IN> input, org.apache.flink.api.java.aggregation.Aggregations function, int field) Non grouped aggregation.
ScalaAggregateOperator(org.apache.flink.api.java.operators.Grouping<IN> input, org.apache.flink.api.java.aggregation.Aggregations function, int field) Grouped aggregation.

方法概要

限定符和类型	方法和说明
ScalaAggregateOperator<IN>	and(org.apache.flink.api.java.aggregation.Aggregations function, int field)
protected org.apache.flink.api.common.operators.base.GroupReduceOperatorBase<IN,IN,org.apache.flink.api.common.functions.GroupReduceFunction<IN,IN>>	translateToDataFlow(org.apache.flink.api.common.operators.Operator<IN> input)

从类继承的方法 org.apache.flink.api.java.operators.SingleInputOperator

getInput, getInputType

从类继承的方法 org.apache.flink.api.java.operators.Operator

getMinResources, getName, getParallelism, getPreferredResources, getResultType, name, setParallelism

从类继承的方法 org.apache.flink.api.java.DataSet

aggregate, checkSameExecutionContext, clean, coGroup, collect, combineGroup, count, cross, crossWithHuge, crossWithTiny, distinct, distinct, distinct, distinct, fillInType, filter, first, flatMap, fullOuterJoin, fullOuterJoin, getExecutionEnvironment, getType, groupBy, groupBy, groupBy, iterate, iterateDelta, join, join, joinWithHuge, joinWithTiny, leftOuterJoin, leftOuterJoin, map, mapPartition, max, maxBy, min, minBy, output, partitionByHash, partitionByHash, partitionByHash, partitionByRange, partitionByRange, partitionByRange, partitionCustom, partitionCustom, partitionCustom, print, print, printOnTaskManager, printToErr, printToErr, project, rebalance, reduce, reduceGroup, rightOuterJoin, rightOuterJoin, runOperation, sortPartition, sortPartition, sortPartition, sum, union, write, write, writeAsCsv, writeAsCsv, writeAsCsv, writeAsCsv, writeAsFormattedText, writeAsFormattedText, writeAsText, writeAsText

从类继承的方法 java.lang.Object

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

构造器详细资料

ScalaAggregateOperator

public ScalaAggregateOperator(org.apache.flink.api.java.DataSet<IN> input,
                              org.apache.flink.api.java.aggregation.Aggregations function,
                              int field)

Non grouped aggregation.

ScalaAggregateOperator

public ScalaAggregateOperator(org.apache.flink.api.java.operators.Grouping<IN> input,
                              org.apache.flink.api.java.aggregation.Aggregations function,
                              int field)

Grouped aggregation.

参数:

input -

function -

field -

方法详细资料

and

public ScalaAggregateOperator<IN> and(org.apache.flink.api.java.aggregation.Aggregations function,
                                      int field)

translateToDataFlow

protected org.apache.flink.api.common.operators.base.GroupReduceOperatorBase<IN,IN,org.apache.flink.api.common.functions.GroupReduceFunction<IN,IN>> translateToDataFlow(org.apache.flink.api.common.operators.Operator<IN> input)

指定者:

translateToDataFlow 在类中 org.apache.flink.api.java.operators.SingleInputOperator<IN,IN,ScalaAggregateOperator<IN>>