org.apache.iotdb.db.query.aggregation.impl

类 MinTimeAggrResult

java.lang.Object

org.apache.iotdb.db.query.aggregation.AggregateResult

org.apache.iotdb.db.query.aggregation.impl.MinTimeAggrResult

直接已知子类:

MinTimeDescAggrResult

public class MinTimeAggrResult
extends AggregateResult

字段概要

从类继承的字段 org.apache.iotdb.db.query.aggregation.AggregateResult

hasCandidateResult, resultDataType, TIME_LENGTH_FOR_FIRST_VALUE

构造器概要

构造器

构造器和说明
MinTimeAggrResult()

方法概要

限定符和类型	方法和说明
protected void	deserializeSpecificFields(ByteBuffer buffer)
Long	getResult()
boolean	hasFinalResult() Judge if aggregation results have been calculated.
void	merge(AggregateResult another) Merge another aggregateResult into this
protected void	serializeSpecificFields(OutputStream outputStream)
void	updateResultFromPageData(IBatchDataIterator batchIterator) Aggregate results cannot be calculated using Statistics directly, using the data in each page.
void	updateResultFromPageData(IBatchDataIterator batchIterator, Predicate<Long> boundPredicate) Aggregate results cannot be calculated using Statistics directly, using the data in each page.
void	updateResultFromStatistics(Statistics statistics) Calculate the aggregation using Statistics
void	updateResultUsingTimestamps(long[] timestamps, int length, IReaderByTimestamp dataReader) This method calculates the aggregation using common timestamps of the cross series filter.
void	updateResultUsingValues(long[] timestamps, int length, ValueIterator valueIterator) This method calculates the aggregation using values that have been calculated

从类继承的方法 org.apache.iotdb.db.query.aggregation.AggregateResult

deserializeFrom, getAggregationType, getBinaryValue, getBooleanValue, getDoubleValue, getFloatValue, getIntValue, getLongValue, getResultDataType, getValue, hasCandidateResult, isAscending, reset, serializeTo, setBinaryValue, setBooleanValue, setDoubleValue, setFloatValue, setIntValue, setLongValue, setValue, toString

从类继承的方法 java.lang.Object

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

构造器详细资料

MinTimeAggrResult

public MinTimeAggrResult()

方法详细资料

getResult

public Long getResult()

指定者:

getResult 在类中 AggregateResult

updateResultFromStatistics

public void updateResultFromStatistics(Statistics statistics)

从类复制的说明: AggregateResult

Calculate the aggregation using Statistics

指定者:

updateResultFromStatistics 在类中 AggregateResult

参数:

statistics - chunkStatistics or pageStatistics

updateResultFromPageData

public void updateResultFromPageData(IBatchDataIterator batchIterator)

从类复制的说明: AggregateResult

Aggregate results cannot be calculated using Statistics directly, using the data in each page. This method is used in global aggregation query.

指定者:

updateResultFromPageData 在类中 AggregateResult

参数:

batchIterator - the data in Page

updateResultFromPageData

public void updateResultFromPageData(IBatchDataIterator batchIterator,
                                     Predicate<Long> boundPredicate)

从类复制的说明: AggregateResult

Aggregate results cannot be calculated using Statistics directly, using the data in each page. This method is used in GROUP BY aggregation query.

指定者:

updateResultFromPageData 在类中 AggregateResult

参数:

batchIterator - the data in Page

boundPredicate - used to judge whether the current timestamp is out of time range, returns true if it is.

updateResultUsingTimestamps

public void updateResultUsingTimestamps(long[] timestamps,
                                        int length,
                                        IReaderByTimestamp dataReader)
                                 throws IOException

从类复制的说明: AggregateResult

This method calculates the aggregation using common timestamps of the cross series filter.

指定者:

updateResultUsingTimestamps 在类中 AggregateResult

抛出:

IOException - TsFile data read error

updateResultUsingValues

public void updateResultUsingValues(long[] timestamps,
                                    int length,
                                    ValueIterator valueIterator)

从类复制的说明: AggregateResult

This method calculates the aggregation using values that have been calculated

指定者:

updateResultUsingValues 在类中 AggregateResult

hasFinalResult

public boolean hasFinalResult()

从类复制的说明: AggregateResult

Judge if aggregation results have been calculated. In other words, if the aggregated result does not need to compute the remaining data, it returns true.

指定者:

hasFinalResult 在类中 AggregateResult

返回:

If the aggregation result has been calculated return true, else return false.

merge

public void merge(AggregateResult another)

从类复制的说明: AggregateResult

Merge another aggregateResult into this

指定者:

merge 在类中 AggregateResult

deserializeSpecificFields

protected void deserializeSpecificFields(ByteBuffer buffer)

指定者:

deserializeSpecificFields 在类中 AggregateResult

serializeSpecificFields

protected void serializeSpecificFields(OutputStream outputStream)

指定者:

serializeSpecificFields 在类中 AggregateResult