java.lang.Object
- org.apache.iotdb.db.mpp.execution.operator.AggregationUtil

public class AggregationUtil
extends java.lang.Object

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method	Description
`static void`	`appendAggregationResult(org.apache.iotdb.tsfile.read.common.block.TsBlockBuilder tsBlockBuilder, java.util.List<? extends Aggregator> aggregators, ITimeRangeIterator timeRangeIterator)`	Append a row of aggregation results to the result tsBlock.
`static org.apache.iotdb.tsfile.utils.Pair<java.lang.Boolean,org.apache.iotdb.tsfile.read.common.block.TsBlock>`	`calculateAggregationFromRawData(org.apache.iotdb.tsfile.read.common.block.TsBlock inputTsBlock, java.util.List<Aggregator> aggregators, org.apache.iotdb.tsfile.read.common.TimeRange curTimeRange, boolean ascending)`	Calculate aggregation value on the time range from the tsBlock containing raw data.
`static long`	`calculateMaxAggregationResultSize(java.util.List<? extends AggregationDescriptor> aggregationDescriptors, ITimeRangeIterator timeRangeIterator, TypeProvider typeProvider)`
`static long`	`calculateMaxAggregationResultSizeForLastQuery(java.util.List<Aggregator> aggregators, org.apache.iotdb.commons.path.PartialPath inputSeriesPath)`
`static ITimeRangeIterator`	`initTimeRangeIterator(GroupByTimeParameter groupByTimeParameter, boolean ascending, boolean outputPartialTimeWindow)`	If groupByTimeParameter is null, which means it's an aggregation query without down sampling.
`static boolean`	`isAllAggregatorsHasFinalResult(java.util.List<Aggregator> aggregators)`
`static boolean`	`satisfiedTimeRange(org.apache.iotdb.tsfile.read.common.block.TsBlock tsBlock, org.apache.iotdb.tsfile.read.common.TimeRange curTimeRange, boolean ascending)`

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

initTimeRangeIterator

public static ITimeRangeIterator initTimeRangeIterator(GroupByTimeParameter groupByTimeParameter,
                                                       boolean ascending,
                                                       boolean outputPartialTimeWindow)

If groupByTimeParameter is null, which means it's an aggregation query without down sampling. Aggregation query has only one time window and the result set of it does not contain a timestamp, so it doesn't matter what the time range returns.

calculateAggregationFromRawData

public static org.apache.iotdb.tsfile.utils.Pair<java.lang.Boolean,org.apache.iotdb.tsfile.read.common.block.TsBlock> calculateAggregationFromRawData(org.apache.iotdb.tsfile.read.common.block.TsBlock inputTsBlock,
                                                                                                                                                            java.util.List<Aggregator> aggregators,
                                                                                                                                                            org.apache.iotdb.tsfile.read.common.TimeRange curTimeRange,
                                                                                                                                                            boolean ascending)

Calculate aggregation value on the time range from the tsBlock containing raw data.

Returns:: left - whether the aggregation calculation of the current time range has done; right - remaining tsBlock

appendAggregationResult

public static void appendAggregationResult(org.apache.iotdb.tsfile.read.common.block.TsBlockBuilder tsBlockBuilder,
                                           java.util.List<? extends Aggregator> aggregators,
                                           ITimeRangeIterator timeRangeIterator)

Append a row of aggregation results to the result tsBlock.

satisfiedTimeRange

public static boolean satisfiedTimeRange(org.apache.iotdb.tsfile.read.common.block.TsBlock tsBlock,
                                         org.apache.iotdb.tsfile.read.common.TimeRange curTimeRange,
                                         boolean ascending)

Returns:: whether the tsBlock contains the data of the current time window

isAllAggregatorsHasFinalResult

public static boolean isAllAggregatorsHasFinalResult(java.util.List<Aggregator> aggregators)

calculateMaxAggregationResultSize

public static long calculateMaxAggregationResultSize(java.util.List<? extends AggregationDescriptor> aggregationDescriptors,
                                                     ITimeRangeIterator timeRangeIterator,
                                                     TypeProvider typeProvider)

calculateMaxAggregationResultSizeForLastQuery

public static long calculateMaxAggregationResultSizeForLastQuery(java.util.List<Aggregator> aggregators,
                                                                 org.apache.iotdb.commons.path.PartialPath inputSeriesPath)

Class AggregationUtil