org.apache.iotdb.db.query.dataset.groupby

类 GroupByEngineDataSet

java.lang.Object

org.apache.iotdb.tsfile.read.query.dataset.QueryDataSet

org.apache.iotdb.db.query.dataset.groupby.GroupByEngineDataSet

直接已知子类:

GroupByFillDataSet, GroupByWithoutValueFilterDataSet, GroupByWithValueFilterDataSet

public abstract class GroupByEngineDataSet
extends QueryDataSet

嵌套类概要

从类继承的嵌套类/接口 org.apache.iotdb.tsfile.read.query.dataset.QueryDataSet

QueryDataSet.EndPoint

字段概要

字段

限定符和类型	字段和说明
protected AggregateResult[]	curAggregateResults
protected long	curEndTime
protected long	curStartTime
protected long	endTime
protected boolean	hasCachedTimeInterval
protected long	interval
protected boolean	isIntervalByMonth
protected boolean	isSlidingStepByMonth
protected boolean	leftCRightO
static long	MS_TO_MONTH
protected long	queryId
protected long	slidingStep
protected long	startTime

从类继承的字段 org.apache.iotdb.tsfile.read.query.dataset.QueryDataSet

alreadyReturnedRowNum, ascending, columnNum, dataTypes, endPoint, fetchSize, paths, rowLimit, rowOffset, withoutAllNull, withoutAnyNull, withoutNullColumnsIndex

构造器概要

构造器

构造器和说明
GroupByEngineDataSet()
GroupByEngineDataSet(QueryContext context, GroupByTimePlan groupByTimePlan) groupBy query.

方法概要

限定符和类型	方法和说明
static long	calcIntervalByMonth(long startTime, long numMonths) add natural months based on the startTime to avoid edge cases, ie 2/28
AggregateResult[]	getCurAggregateResults()
protected Pair<Long,Long>	getFirstTimeRange()
protected Pair<Long,Long>	getLastTimeRange()
protected Pair<Long,Long>	getNextTimeRange(long curStartTime, boolean isAscending, boolean isInside)
long	getStartTime()
boolean	hasNextWithoutConstraint()
protected void	initGroupByEngineDataSetFields(QueryContext context, GroupByTimePlan groupByTimePlan)
Pair<Long,Long>	nextTimePartition()
abstract RowRecord	nextWithoutConstraint()

从类继承的方法 org.apache.iotdb.tsfile.read.query.dataset.QueryDataSet

decreaseAlreadyReturnedRowNum, getColumnNum, getDataTypes, getEndPoint, getPaths, getRowLimit, getRowOffset, getWithoutNullColumnsIndex, hasLimit, hasNext, initQueryDataSetFields, isWithoutAllNull, isWithoutAnyNull, next, setColumnNum, setDataTypes, setEndPoint, setFetchSize, setRowLimit, setRowOffset, setWithoutAllNull, setWithoutAnyNull, setWithoutNullColumnsIndex, withoutNullFilter

从类继承的方法 java.lang.Object

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

字段详细资料

queryId

protected long queryId

interval

protected long interval

slidingStep

protected long slidingStep

startTime

protected long startTime

endTime

protected long endTime

curStartTime

protected long curStartTime

curEndTime

protected long curEndTime

hasCachedTimeInterval

protected boolean hasCachedTimeInterval

leftCRightO

protected boolean leftCRightO

isIntervalByMonth

protected boolean isIntervalByMonth

isSlidingStepByMonth

protected boolean isSlidingStepByMonth

MS_TO_MONTH

public static final long MS_TO_MONTH

另请参阅:

常量字段值

curAggregateResults

protected AggregateResult[] curAggregateResults

构造器详细资料

GroupByEngineDataSet

public GroupByEngineDataSet()

GroupByEngineDataSet

public GroupByEngineDataSet(QueryContext context,
                            GroupByTimePlan groupByTimePlan)

groupBy query.

方法详细资料

getFirstTimeRange

protected Pair<Long,Long> getFirstTimeRange()

getLastTimeRange

protected Pair<Long,Long> getLastTimeRange()

getNextTimeRange

protected Pair<Long,Long> getNextTimeRange(long curStartTime,
                                           boolean isAscending,
                                           boolean isInside)

initGroupByEngineDataSetFields

protected void initGroupByEngineDataSetFields(QueryContext context,
                                              GroupByTimePlan groupByTimePlan)

hasNextWithoutConstraint

public boolean hasNextWithoutConstraint()

指定者:

hasNextWithoutConstraint 在类中 QueryDataSet

calcIntervalByMonth

public static long calcIntervalByMonth(long startTime,
                                       long numMonths)

add natural months based on the startTime to avoid edge cases, ie 2/28

参数:

startTime - current start time

numMonths - numMonths is updated in hasNextWithoutConstraint()

返回:

nextStartTime

nextWithoutConstraint

public abstract RowRecord nextWithoutConstraint()
                                         throws IOException

指定者:

nextWithoutConstraint 在类中 QueryDataSet

抛出:

IOException

getStartTime

public long getStartTime()

getCurAggregateResults

public AggregateResult[] getCurAggregateResults()

nextTimePartition

public Pair<Long,Long> nextTimePartition()