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

Class LastValueDescAccumulator

java.lang.Object

org.apache.iotdb.db.mpp.aggregation.LastValueAccumulator

org.apache.iotdb.db.mpp.aggregation.LastValueDescAccumulator

All Implemented Interfaces:

Accumulator

public class LastValueDescAccumulator
extends LastValueAccumulator

Field Summary

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

initResult, lastValue, maxTime, seriesDataType

Constructor Summary

Constructors

Constructor	Description
LastValueDescAccumulator(org.apache.iotdb.tsfile.file.metadata.enums.TSDataType seriesDataType)

Method Summary

Modifier and Type	Method	Description
protected int	addBinaryInput(org.apache.iotdb.tsfile.read.common.block.column.Column[] column, org.apache.iotdb.tsfile.read.common.TimeRange timeRange)
protected int	addBooleanInput(org.apache.iotdb.tsfile.read.common.block.column.Column[] column, org.apache.iotdb.tsfile.read.common.TimeRange timeRange)
protected int	addDoubleInput(org.apache.iotdb.tsfile.read.common.block.column.Column[] column, org.apache.iotdb.tsfile.read.common.TimeRange timeRange)
protected int	addFloatInput(org.apache.iotdb.tsfile.read.common.block.column.Column[] column, org.apache.iotdb.tsfile.read.common.TimeRange timeRange)
protected int	addIntInput(org.apache.iotdb.tsfile.read.common.block.column.Column[] column, org.apache.iotdb.tsfile.read.common.TimeRange timeRange)
protected int	addLongInput(org.apache.iotdb.tsfile.read.common.block.column.Column[] column, org.apache.iotdb.tsfile.read.common.TimeRange timeRange)
boolean	hasFinalResult()	This method can only be used in seriesAggregateScanOperator.
void	reset()

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

addInput, addIntermediate, addStatistics, getFinalType, getIntermediateType, outputFinal, outputIntermediate, setFinal, updateBinaryLastValue, updateBooleanLastValue, updateDoubleLastValue, updateFloatLastValue, updateIntLastValue, updateLongLastValue

Methods inherited from class java.lang.Object

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

Constructor Detail

LastValueDescAccumulator

public LastValueDescAccumulator(org.apache.iotdb.tsfile.file.metadata.enums.TSDataType seriesDataType)

Method Detail

hasFinalResult

public boolean hasFinalResult()

Description copied from interface: Accumulator

This method can only be used in seriesAggregateScanOperator. For first_value or last_value in decreasing order, we can get final result by the first record.

Specified by:

hasFinalResult in interface Accumulator

Overrides:

hasFinalResult in class LastValueAccumulator

reset

public void reset()

Specified by:

reset in interface Accumulator

Overrides:

reset in class LastValueAccumulator

addIntInput

protected int addIntInput(org.apache.iotdb.tsfile.read.common.block.column.Column[] column,
                          org.apache.iotdb.tsfile.read.common.TimeRange timeRange)

Overrides:

addIntInput in class LastValueAccumulator

addLongInput

protected int addLongInput(org.apache.iotdb.tsfile.read.common.block.column.Column[] column,
                           org.apache.iotdb.tsfile.read.common.TimeRange timeRange)

Overrides:

addLongInput in class LastValueAccumulator

addFloatInput

protected int addFloatInput(org.apache.iotdb.tsfile.read.common.block.column.Column[] column,
                            org.apache.iotdb.tsfile.read.common.TimeRange timeRange)

Overrides:

addFloatInput in class LastValueAccumulator

addDoubleInput

protected int addDoubleInput(org.apache.iotdb.tsfile.read.common.block.column.Column[] column,
                             org.apache.iotdb.tsfile.read.common.TimeRange timeRange)

Overrides:

addDoubleInput in class LastValueAccumulator

addBooleanInput

protected int addBooleanInput(org.apache.iotdb.tsfile.read.common.block.column.Column[] column,
                              org.apache.iotdb.tsfile.read.common.TimeRange timeRange)

Overrides:

addBooleanInput in class LastValueAccumulator

addBinaryInput

protected int addBinaryInput(org.apache.iotdb.tsfile.read.common.block.column.Column[] column,
                             org.apache.iotdb.tsfile.read.common.TimeRange timeRange)

Overrides:

addBinaryInput in class LastValueAccumulator