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

Packages that use Cursor

Package	Description
org.apache.druid.frame.segment
org.apache.druid.query
org.apache.druid.query.scan
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
org.apache.druid.segment.shim

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

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

Modifier and Type	Class	Description
class	FrameCursor	An implementation of Cursor used by RowFrameCursorFactory and ColumnarFrameCursorFactory.

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

Modifier and Type	Method	Description
static Iterable<Frame>	FrameCursorUtils.cursorToFramesIterable(Cursor cursor, FrameWriterFactory frameWriterFactory)	Writes a Cursor to a sequence of Frame.
static Sequence<Frame>	FrameCursorUtils.cursorToFramesSequence(Cursor cursor, FrameWriterFactory frameWriterFactory)	Writes a Cursor to a sequence of Frame.

Uses of Cursor in org.apache.druid.query

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

Modifier and Type	Method	Description
static Pair<Cursor,Closeable>	IterableRowsCursorHelper.getCursorFromIterable(Iterable<Object[]> rows, RowSignature rowSignature)	Creates a cursor that iterates over all the rows generated by the iterable.
static Pair<Cursor,Closeable>	IterableRowsCursorHelper.getCursorFromSequence(Sequence<Object[]> rows, RowSignature rowSignature)	Creates a cursor that iterates over all the rows generated by the sequence.
static Pair<Cursor,Closeable>	IterableRowsCursorHelper.getCursorFromYielder(Yielder<Object[]> yielderParam, RowSignature rowSignature)

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

Modifier and Type	Method	Description
static CursorGranularizer	CursorGranularizer.create(Cursor cursor, TimeBoundaryInspector timeBoundaryInspector, Order timeOrder, Granularity granularity, org.joda.time.Interval queryInterval)

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

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

Modifier	Constructor	Description
	SettableCursorColumnSelectorFactory(Supplier<Cursor> cursorSupplier, RowSignature rowSignature)

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

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

Modifier and Type	Method	Description
Cursor	TopNParams.getCursor()

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

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

Modifier	Constructor	Description
	PooledTopNParams(ColumnSelectorPlus selectorPlus, Cursor cursor, CursorGranularizer granularizer, ResourceHolder<ByteBuffer> resultsBufHolder, ByteBuffer resultsBuf, int[] aggregatorSizes, int numBytesPerRecord, int numValuesPerPass, TopNMetricSpecBuilder<int[]> arrayProvider)
protected	TopNParams(ColumnSelectorPlus<TopNColumnAggregatesProcessor> selectorPlus, Cursor cursor, CursorGranularizer granularizer, 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	Description
long	NullableNumericTopNColumnAggregatesProcessor.scanAndAggregate(TopNQuery query, Selector selector, Cursor cursor, CursorGranularizer granularizer, Aggregator[][] rowSelector)
long	StringTopNColumnAggregatesProcessor.scanAndAggregate(TopNQuery query, DimensionSelector selector, Cursor cursor, CursorGranularizer granularizer, Aggregator[][] rowSelector)
long	TopNColumnAggregatesProcessor.scanAndAggregate(TopNQuery query, ValueSelectorType selector, Cursor cursor, CursorGranularizer granularizer, 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	Description
class	RowBasedCursor<RowType>	A Cursor that is based on a stream of objects.
class	UnnestColumnValueSelectorCursor	The cursor to help unnest MVDs without dictionary encoding and ARRAY type selectors.
class	UnnestDimensionCursor	The cursor to help unnest MVDs with dictionary encoding.

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

Modifier and Type	Method	Description
Cursor	CursorHolder.asCursor()	Create a Cursor for use with non-vectorized query engines.
Cursor	QueryableIndexCursorHolder.asCursor()

Constructors in org.apache.druid.segment with parameters of type Cursor

Modifier	Constructor	Description
	UnnestColumnValueSelectorCursor(Cursor cursor, ColumnSelectorFactory baseColumnSelectorFactory, VirtualColumn unnestColumn)
	UnnestDimensionCursor(Cursor cursor, ColumnSelectorFactory baseColumnSelectorFactory, VirtualColumn unnestColumn)

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

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

Modifier and Type	Interface	Description
interface	HistoricalCursor

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

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

Modifier and Type	Method	Description
Cursor	IncrementalIndexCursorHolder.asCursor()

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

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

Modifier and Type	Class	Description
class	PostJoinCursor	A Cursor decorator used by HashJoinSegmentCursorFactory.makeCursorHolder(CursorBuildSpec) to add post-join virtual columns and filters.

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

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

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

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

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

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

Modifier and Type	Class	Description
class	ShimCursor	Adapter from VectorCursor to Cursor.