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

Class FirstValueDescAccumulator

java.lang.Object

org.apache.iotdb.db.mpp.aggregation.FirstValueAccumulator

org.apache.iotdb.db.mpp.aggregation.FirstValueDescAccumulator

All Implemented Interfaces:

Accumulator

public class FirstValueDescAccumulator
extends FirstValueAccumulator

Field Summary

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

firstValue, hasCandidateResult, minTime, seriesDataType

Constructor Summary

Constructors

Constructor	Description
FirstValueDescAccumulator(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.

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

addInput, addIntermediate, addStatistics, getFinalType, getIntermediateType, outputFinal, outputIntermediate, reset, setFinal, updateBinaryFirstValue, updateBooleanFirstValue, updateDoubleFirstValue, updateFloatFirstValue, updateIntFirstValue, updateLongFirstValue

Methods inherited from class java.lang.Object

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

Constructor Detail

FirstValueDescAccumulator

public FirstValueDescAccumulator(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 FirstValueAccumulator

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 FirstValueAccumulator

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 FirstValueAccumulator

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 FirstValueAccumulator

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 FirstValueAccumulator

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 FirstValueAccumulator

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 FirstValueAccumulator