Package org.apache.iotdb.db.mpp.aggregation.slidingwindow

Class MonotonicQueueSlidingWindowAggregator

java.lang.Object

org.apache.iotdb.db.mpp.aggregation.Aggregator

org.apache.iotdb.db.mpp.aggregation.slidingwindow.SlidingWindowAggregator

org.apache.iotdb.db.mpp.aggregation.slidingwindow.MonotonicQueueSlidingWindowAggregator

public class MonotonicQueueSlidingWindowAggregator
extends SlidingWindowAggregator

When computing MAX_VALUE, MIN_VALUE, EXTREME, we only add partial aggregation results that maintain monotonicity to queue. The aggregation result always appears at the head of the queue.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.iotdb.db.mpp.aggregation.slidingwindow.SlidingWindowAggregator

SlidingWindowAggregator.PartialAggregationResult

Field Summary

Fields inherited from class org.apache.iotdb.db.mpp.aggregation.slidingwindow.SlidingWindowAggregator

deque

Fields inherited from class org.apache.iotdb.db.mpp.aggregation.Aggregator

accumulator, curTimeRange, inputLocationList, step

Constructor Summary

Constructors

Constructor	Description
MonotonicQueueSlidingWindowAggregator(Accumulator accumulator, java.util.List<InputLocation[]> inputLocationList, AggregationStep step, java.util.Comparator<org.apache.iotdb.tsfile.read.common.block.column.Column> comparator)

Method Summary

Modifier and Type	Method	Description
protected void	evictingExpiredValue()	evicting expired element in queue and reset expired aggregateResult
void	processPartialResult(SlidingWindowAggregator.PartialAggregationResult partialResult)	update queue and aggregateResult

Methods inherited from class org.apache.iotdb.db.mpp.aggregation.slidingwindow.SlidingWindowAggregator

processTsBlock, updateTimeRange

Methods inherited from class org.apache.iotdb.db.mpp.aggregation.Aggregator

getCurTimeRange, getOutputType, hasFinalResult, outputResult, processStatistics, processTsBlocks, reset

Methods inherited from class java.lang.Object

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

Constructor Detail

MonotonicQueueSlidingWindowAggregator

public MonotonicQueueSlidingWindowAggregator(Accumulator accumulator,
                                             java.util.List<InputLocation[]> inputLocationList,
                                             AggregationStep step,
                                             java.util.Comparator<org.apache.iotdb.tsfile.read.common.block.column.Column> comparator)

Method Detail

evictingExpiredValue

protected void evictingExpiredValue()

Description copied from class: SlidingWindowAggregator

evicting expired element in queue and reset expired aggregateResult

Specified by:

evictingExpiredValue in class SlidingWindowAggregator

processPartialResult

public void processPartialResult(SlidingWindowAggregator.PartialAggregationResult partialResult)

Description copied from class: SlidingWindowAggregator

update queue and aggregateResult

Specified by:

processPartialResult in class SlidingWindowAggregator