Package org.apache.druid.query.topn

Class TimeExtractionTopNAlgorithm

java.lang.Object

org.apache.druid.query.topn.BaseTopNAlgorithm<int[],Map<Object,Aggregator[]>,TopNParams>

org.apache.druid.query.topn.TimeExtractionTopNAlgorithm

All Implemented Interfaces:

TopNAlgorithm<int[],TopNParams>

public class TimeExtractionTopNAlgorithm
extends BaseTopNAlgorithm<int[],Map<Object,Aggregator[]>,TopNParams>

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.druid.query.topn.BaseTopNAlgorithm

BaseTopNAlgorithm.AggregatorArrayProvider, BaseTopNAlgorithm.BaseArrayProvider<T>

Field Summary

Fields inherited from class org.apache.druid.query.topn.BaseTopNAlgorithm

cursorInspector

Fields inherited from interface org.apache.druid.query.topn.TopNAlgorithm

EMPTY_ARRAY, INIT_POSITION_VALUE, SKIP_POSITION_VALUE

Constructor Summary

Constructors

Constructor	Description
TimeExtractionTopNAlgorithm(TopNQuery query, TopNCursorInspector cursorInspector)

Method Summary

Modifier and Type	Method	Description
void	cleanup(TopNParams params)
protected Map<Object,Aggregator[]>	makeDimValAggregateStore(TopNParams params)
protected int[]	makeDimValSelector(TopNParams params, int numProcessed, int numToProcess)
TopNParams	makeInitParams(ColumnSelectorPlus selectorPlus, Cursor cursor, CursorGranularizer granularizer)
protected void	resetAggregators(Map<Object,Aggregator[]> stringMap)
protected long	scanAndAggregate(TopNParams params, int[] dimValSelector, Map<Object,Aggregator[]> aggregatesStore)	Returns the number of processed rows (i.
protected int[]	updateDimValSelector(int[] dimValSelector, int numProcessed, int numToProcess)
protected void	updateResults(TopNParams params, int[] dimValSelector, Map<Object,Aggregator[]> aggregatesStore, TopNResultBuilder resultBuilder)

Methods inherited from class org.apache.druid.query.topn.BaseTopNAlgorithm

computeNewLength, makeAggregators, makeBufferAggregators, makeResultBuilder, run

Methods inherited from class java.lang.Object

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

Constructor Detail

TimeExtractionTopNAlgorithm

public TimeExtractionTopNAlgorithm(TopNQuery query,
                                   TopNCursorInspector cursorInspector)

Method Detail

makeInitParams

public TopNParams makeInitParams(ColumnSelectorPlus selectorPlus,
                                 Cursor cursor,
                                 CursorGranularizer granularizer)

makeDimValSelector

protected int[] makeDimValSelector(TopNParams params,
                                   int numProcessed,
                                   int numToProcess)

Specified by:

makeDimValSelector in class BaseTopNAlgorithm<int[],Map<Object,Aggregator[]>,TopNParams>

updateDimValSelector

protected int[] updateDimValSelector(int[] dimValSelector,
                                     int numProcessed,
                                     int numToProcess)

Specified by:

updateDimValSelector in class BaseTopNAlgorithm<int[],Map<Object,Aggregator[]>,TopNParams>

makeDimValAggregateStore

protected Map<Object,Aggregator[]> makeDimValAggregateStore(TopNParams params)

Specified by:

makeDimValAggregateStore in class BaseTopNAlgorithm<int[],Map<Object,Aggregator[]>,TopNParams>

scanAndAggregate

protected long scanAndAggregate(TopNParams params,
                                int[] dimValSelector,
                                Map<Object,Aggregator[]> aggregatesStore)

Description copied from class: BaseTopNAlgorithm

Returns the number of processed rows (i. e. after postFilters are applied inside the cursor being processed).

Specified by:

scanAndAggregate in class BaseTopNAlgorithm<int[],Map<Object,Aggregator[]>,TopNParams>

updateResults

protected void updateResults(TopNParams params,
                             int[] dimValSelector,
                             Map<Object,Aggregator[]> aggregatesStore,
                             TopNResultBuilder resultBuilder)

Specified by:

updateResults in class BaseTopNAlgorithm<int[],Map<Object,Aggregator[]>,TopNParams>

resetAggregators

protected void resetAggregators(Map<Object,Aggregator[]> stringMap)

Specified by:

resetAggregators in class BaseTopNAlgorithm<int[],Map<Object,Aggregator[]>,TopNParams>

cleanup

public void cleanup(TopNParams params)