org.apache.flink.table.runtime.operators.window.combines

接口 RecordsCombiner

所有已知实现类:

AggCombiner, GlobalAggCombiner, LocalAggCombiner, TopNRecordsCombiner

@Internal
public interface RecordsCombiner

The RecordsCombiner is used to combine buffered records into state.

嵌套类概要

嵌套类

限定符和类型	接口和说明
static interface	RecordsCombiner.Factory A factory that creates a RecordsCombiner.
static interface	RecordsCombiner.LocalFactory A factory that creates a RecordsCombiner used for combining at local stage.

方法概要

限定符和类型	方法和说明
void	close() Release resources allocated by this combine function.
void	combine(WindowKey windowKey, Iterator<org.apache.flink.table.data.RowData> records) Combines the buffered data into state based on the given window-key pair.

方法详细资料

combine

void combine(WindowKey windowKey,
             Iterator<org.apache.flink.table.data.RowData> records)
      throws Exception

Combines the buffered data into state based on the given window-key pair.

参数:

windowKey - the window-key pair that the buffered data belong to, the window-key object is reused.

records - the buffered data, the iterator and RowData objects are reused.

抛出:

Exception

close

void close()
    throws Exception

Release resources allocated by this combine function.

抛出:

Exception