Package org.apache.iotdb.db.query.executor.groupby.impl

Class MonotonicQueueSlidingWindowGroupByExecutor

java.lang.Object

org.apache.iotdb.db.query.executor.groupby.SlidingWindowGroupByExecutor

org.apache.iotdb.db.query.executor.groupby.impl.MonotonicQueueSlidingWindowGroupByExecutor

public class MonotonicQueueSlidingWindowGroupByExecutor
extends SlidingWindowGroupByExecutor

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

Field Summary

Fields inherited from class org.apache.iotdb.db.query.executor.groupby.SlidingWindowGroupByExecutor

aggregateResult, curEndTime, curStartTime, deque

Constructor Summary

Constructors

Constructor	Description
MonotonicQueueSlidingWindowGroupByExecutor(org.apache.iotdb.tsfile.file.metadata.enums.TSDataType dataType, java.lang.String aggrFuncName, boolean ascending, java.util.Comparator<AggregateResult> comparator)

Method Summary

Modifier and Type	Method	Description
protected void	evictingExpiredValue()	evicting expired element in queue and reset expired aggregateResult
void	update(AggregateResult aggregateResult)	update queue and aggregateResult

Methods inherited from class org.apache.iotdb.db.query.executor.groupby.SlidingWindowGroupByExecutor

getAggregateResult, inTimeRange, setTimeRange

Methods inherited from class java.lang.Object

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

Constructor Detail

MonotonicQueueSlidingWindowGroupByExecutor

public MonotonicQueueSlidingWindowGroupByExecutor(org.apache.iotdb.tsfile.file.metadata.enums.TSDataType dataType,
                                                  java.lang.String aggrFuncName,
                                                  boolean ascending,
                                                  java.util.Comparator<AggregateResult> comparator)

Method Detail

update

public void update(AggregateResult aggregateResult)

Description copied from class: SlidingWindowGroupByExecutor

update queue and aggregateResult

Specified by:

update in class SlidingWindowGroupByExecutor

evictingExpiredValue

protected void evictingExpiredValue()

Description copied from class: SlidingWindowGroupByExecutor

evicting expired element in queue and reset expired aggregateResult

Specified by:

evictingExpiredValue in class SlidingWindowGroupByExecutor