Uses of Interface
org.apache.druid.segment.Cursor

Packages that use Cursor

Package	Description
org.apache.druid.query
org.apache.druid.query.topn
org.apache.druid.query.topn.types
org.apache.druid.segment
org.apache.druid.segment.historical
org.apache.druid.segment.incremental
org.apache.druid.segment.join

Uses of Cursor in org.apache.druid.query

Method parameters in org.apache.druid.query with type arguments of type Cursor

Modifier and Type	Method and Description
static <T> Sequence<Result<T>>	QueryRunnerHelper.makeCursorBasedQuery(StorageAdapter adapter, List<org.joda.time.Interval> queryIntervals, Filter filter, VirtualColumns virtualColumns, boolean descending, Granularity granularity, com.google.common.base.Function<Cursor,Result<T>> mapFn)

Uses of Cursor in org.apache.druid.query.topn

Methods in org.apache.druid.query.topn that return Cursor

Modifier and Type	Method and Description
Cursor	TopNParams.getCursor()

Methods in org.apache.druid.query.topn with parameters of type Cursor

Modifier and Type	Method and Description
Result<TopNResultValue>	TopNMapFn.apply(Cursor cursor, TopNQueryMetrics queryMetrics)
void	TopNQueryMetrics.cursor(Cursor cursor) This method is called exactly once with each cursor, processed for the query.
void	DefaultTopNQueryMetrics.cursor(Cursor cursor)
static Aggregator[]	BaseTopNAlgorithm.makeAggregators(Cursor cursor, List<AggregatorFactory> aggregatorSpecs)
protected static BufferAggregator[]	BaseTopNAlgorithm.makeBufferAggregators(Cursor cursor, List<AggregatorFactory> aggregatorSpecs)
TopNParams	TopNAlgorithm.makeInitParams(ColumnSelectorPlus<TopNColumnAggregatesProcessor> selectorPlus, Cursor cursor)
TopNParams	HeapBasedTopNAlgorithm.makeInitParams(ColumnSelectorPlus<TopNColumnAggregatesProcessor> selectorPlus, Cursor cursor)
PooledTopNAlgorithm.PooledTopNParams	PooledTopNAlgorithm.makeInitParams(ColumnSelectorPlus selectorPlus, Cursor cursor)
TopNParams	TimeExtractionTopNAlgorithm.makeInitParams(ColumnSelectorPlus selectorPlus, Cursor cursor)
TopNParams	AggregateTopNMetricFirstAlgorithm.makeInitParams(ColumnSelectorPlus selectorPlus, Cursor cursor)
long	Generic2AggPooledTopNScannerPrototype.scanAndAggregate(DimensionSelector dimensionSelector, BufferAggregator aggregator1, int aggregator1Size, BufferAggregator aggregator2, int aggregator2Size, Cursor cursor, int[] positions, ByteBuffer resultsBuffer) Any changes to this method should be coordinated with TopNUtils, PooledTopNAlgorithm.computeSpecializedScanAndAggregateImplementations() and downstream methods.
long	Generic2AggPooledTopNScanner.scanAndAggregate(DimensionSelector dimensionSelector, BufferAggregator aggregator1, int aggregator1Size, BufferAggregator aggregator2, int aggregator2Size, Cursor cursor, int[] positions, ByteBuffer resultsBuffer)
long	Generic1AggPooledTopNScanner.scanAndAggregate(DimensionSelector dimensionSelector, BufferAggregator aggregator, int aggregatorSize, Cursor cursor, int[] positions, ByteBuffer resultsBuffer)
long	Generic1AggPooledTopNScannerPrototype.scanAndAggregate(DimensionSelector dimensionSelector, BufferAggregator aggregator, int aggregatorSize, Cursor cursor, int[] positions, ByteBuffer resultsBuffer) Any changes to this method should be coordinated with TopNUtils, PooledTopNAlgorithm.computeSpecializedScanAndAggregateImplementations() and downstream methods.
PooledTopNAlgorithm.PooledTopNParams.Builder	PooledTopNAlgorithm.PooledTopNParams.Builder.withCursor(Cursor cursor)

Constructors in org.apache.druid.query.topn with parameters of type Cursor

Constructor and Description
PooledTopNParams(ColumnSelectorPlus selectorPlus, Cursor cursor, ResourceHolder<ByteBuffer> resultsBufHolder, ByteBuffer resultsBuf, int[] aggregatorSizes, int numBytesPerRecord, int numValuesPerPass, TopNMetricSpecBuilder<int[]> arrayProvider)
TopNParams(ColumnSelectorPlus<TopNColumnAggregatesProcessor> selectorPlus, Cursor cursor, int numValuesPerPass)

Uses of Cursor in org.apache.druid.query.topn.types

Methods in org.apache.druid.query.topn.types with parameters of type Cursor

Modifier and Type	Method and Description
long	StringTopNColumnAggregatesProcessor.scanAndAggregate(TopNQuery query, DimensionSelector selector, Cursor cursor, Aggregator[][] rowSelector)
long	NullableNumericTopNColumnAggregatesProcessor.scanAndAggregate(TopNQuery query, Selector selector, Cursor cursor, Aggregator[][] rowSelector)
long	TopNColumnAggregatesProcessor.scanAndAggregate(TopNQuery query, ValueSelectorType selector, Cursor cursor, Aggregator[][] rowSelector) Used by HeapBasedTopNAlgorithm.

Uses of Cursor in org.apache.druid.segment

Classes in org.apache.druid.segment that implement Cursor

Modifier and Type	Class and Description
class	RowBasedCursor<RowType> A Cursor that is based on a stream of objects.

Methods in org.apache.druid.segment that return types with arguments of type Cursor

Modifier and Type	Method and Description
Sequence<Cursor>	QueryableIndexCursorSequenceBuilder.build(Granularity gran)
Sequence<Cursor>	CursorFactory.makeCursors(Filter filter, org.joda.time.Interval interval, VirtualColumns virtualColumns, Granularity gran, boolean descending, QueryMetrics<?> queryMetrics) Creates a sequence of Cursors, one for each time-granular bucket (based on the provided Granularity).
Sequence<Cursor>	RowBasedStorageAdapter.makeCursors(Filter filter, org.joda.time.Interval queryInterval, VirtualColumns virtualColumns, Granularity gran, boolean descending, QueryMetrics<?> queryMetrics)
Sequence<Cursor>	QueryableIndexStorageAdapter.makeCursors(Filter filter, org.joda.time.Interval interval, VirtualColumns virtualColumns, Granularity gran, boolean descending, QueryMetrics<?> queryMetrics)

Uses of Cursor in org.apache.druid.segment.historical

Subinterfaces of Cursor in org.apache.druid.segment.historical

Modifier and Type	Interface and Description
interface	HistoricalCursor

Uses of Cursor in org.apache.druid.segment.incremental

Methods in org.apache.druid.segment.incremental that return types with arguments of type Cursor

Modifier and Type	Method and Description
Sequence<Cursor>	IncrementalIndexStorageAdapter.makeCursors(Filter filter, org.joda.time.Interval interval, VirtualColumns virtualColumns, Granularity gran, boolean descending, QueryMetrics<?> queryMetrics)

Uses of Cursor in org.apache.druid.segment.join

Classes in org.apache.druid.segment.join that implement Cursor

Modifier and Type	Class and Description
class	PostJoinCursor A Cursor decorator used by HashJoinSegmentStorageAdapter.makeCursors(org.apache.druid.query.filter.Filter, org.joda.time.Interval, org.apache.druid.segment.VirtualColumns, org.apache.druid.java.util.common.granularity.Granularity, boolean, org.apache.druid.query.QueryMetrics<?>) to add post-join virtual columns and filters.

Methods in org.apache.druid.segment.join that return Cursor

Modifier and Type	Method and Description
static Cursor	HashJoinEngine.makeJoinCursor(Cursor leftCursor, JoinableClause joinableClause) Creates a cursor that represents the join of with .

Methods in org.apache.druid.segment.join that return types with arguments of type Cursor

Modifier and Type	Method and Description
Sequence<Cursor>	HashJoinSegmentStorageAdapter.makeCursors(Filter filter, org.joda.time.Interval interval, VirtualColumns virtualColumns, Granularity gran, boolean descending, QueryMetrics<?> queryMetrics)

Methods in org.apache.druid.segment.join with parameters of type Cursor

Modifier and Type	Method and Description
static Cursor	HashJoinEngine.makeJoinCursor(Cursor leftCursor, JoinableClause joinableClause) Creates a cursor that represents the join of with .
static PostJoinCursor	PostJoinCursor.wrap(Cursor baseCursor, VirtualColumns virtualColumns, Filter filter)