java.lang.Object
- org.apache.iotdb.db.query.executor.groupby.SlidingWindowGroupByExecutor
- - org.apache.iotdb.db.query.executor.groupby.impl.SmoothQueueSlidingWindowGroupByExecutor

```
public class SmoothQueueSlidingWindowGroupByExecutor
extends SlidingWindowGroupByExecutor
```
The aggregation result is calculated from all pre-aggregation results in the currently maintained queue when calculating the COUNT, SUM, and AVG. We implement by executing AggregateResult.merge(AggregateResult) when adding to queue and RemovableAggregateResult.remove(AggregateResult) when removing from queue.

Field Summary
- Fields inherited from class org.apache.iotdb.db.query.executor.groupby.SlidingWindowGroupByExecutor
  aggregateResult, curEndTime, curStartTime, deque

Constructors
Constructor	Description
`SmoothQueueSlidingWindowGroupByExecutor(org.apache.iotdb.tsfile.file.metadata.enums.TSDataType dataType, java.lang.String string, boolean ascending)`

All Methods Instance Methods Concrete Methods
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

Class SmoothQueueSlidingWindowGroupByExecutor