org.apache.flink.table.runtime.operators.aggregate

类 MiniBatchGroupAggFunction

java.lang.Object

org.apache.flink.table.runtime.operators.bundle.MapBundleFunction<BaseRow,List<BaseRow>,BaseRow,BaseRow>

org.apache.flink.table.runtime.operators.aggregate.MiniBatchGroupAggFunction

所有已实现的接口:

Serializable, org.apache.flink.api.common.functions.Function

public class MiniBatchGroupAggFunction
extends MapBundleFunction<BaseRow,List<BaseRow>,BaseRow,BaseRow>

Aggregate Function used for the groupby (without window) aggregate in miniBatch mode.

This function buffers input row in heap HashMap, and aggregates them when minibatch invoked.

另请参阅:

序列化表格

字段概要

从类继承的字段 org.apache.flink.table.runtime.operators.bundle.MapBundleFunction

ctx

构造器概要

构造器

构造器和说明
MiniBatchGroupAggFunction(GeneratedAggsHandleFunction genAggsHandler, GeneratedRecordEqualiser genRecordEqualiser, org.apache.flink.table.types.logical.LogicalType[] accTypes, org.apache.flink.table.types.logical.RowType inputType, int indexOfCountStar, boolean generateRetraction) Creates a MiniBatchGroupAggFunction.

方法概要

限定符和类型	方法和说明
List<BaseRow>	addInput(List<BaseRow> value, BaseRow input) Adds the given input to the given value, returning the new bundle value.
void	close()
void	finishBundle(Map<BaseRow,List<BaseRow>> buffer, org.apache.flink.util.Collector<BaseRow> out) Called when a bundle is finished.
void	open(ExecutionContext ctx)

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

MiniBatchGroupAggFunction

public MiniBatchGroupAggFunction(GeneratedAggsHandleFunction genAggsHandler,
                                 GeneratedRecordEqualiser genRecordEqualiser,
                                 org.apache.flink.table.types.logical.LogicalType[] accTypes,
                                 org.apache.flink.table.types.logical.RowType inputType,
                                 int indexOfCountStar,
                                 boolean generateRetraction)

Creates a MiniBatchGroupAggFunction.

参数:

genAggsHandler - The code generated function used to handle aggregates.

genRecordEqualiser - The code generated equaliser used to equal BaseRow.

accTypes - The accumulator types.

inputType - The input row type.

indexOfCountStar - The index of COUNT(*) in the aggregates. -1 when the input doesn't contain COUNT(*), i.e. doesn't contain retraction messages. We make sure there is a COUNT(*) if input stream contains retraction.

generateRetraction - Whether this operator will generate retraction.

方法详细资料

open

public void open(ExecutionContext ctx)
          throws Exception

覆盖:

open 在类中 MapBundleFunction<BaseRow,List<BaseRow>,BaseRow,BaseRow>

抛出:

Exception

addInput

public List<BaseRow> addInput(@Nullable
                              List<BaseRow> value,
                              BaseRow input)
                       throws Exception

从类复制的说明: MapBundleFunction

Adds the given input to the given value, returning the new bundle value.

指定者:

addInput 在类中 MapBundleFunction<BaseRow,List<BaseRow>,BaseRow,BaseRow>

参数:

value - the existing bundle value, maybe null

input - the given input, not null

抛出:

Exception

finishBundle

public void finishBundle(Map<BaseRow,List<BaseRow>> buffer,
                         org.apache.flink.util.Collector<BaseRow> out)
                  throws Exception

从类复制的说明: MapBundleFunction

Called when a bundle is finished. Transform a bundle to zero, one, or more output elements.

指定者:

finishBundle 在类中 MapBundleFunction<BaseRow,List<BaseRow>,BaseRow,BaseRow>

抛出:

Exception

close

public void close()
           throws Exception

覆盖:

close 在类中 MapBundleFunction<BaseRow,List<BaseRow>,BaseRow,BaseRow>

抛出:

Exception