Package org.apache.druid.segment

Class QueryableIndexCursorHolder

java.lang.Object

org.apache.druid.segment.QueryableIndexCursorHolder

All Implemented Interfaces:

Closeable, AutoCloseable, CursorHolder

public class QueryableIndexCursorHolder
extends Object
implements CursorHolder

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	QueryableIndexCursorHolder.AscendingTimestampCheckingOffset
static class	QueryableIndexCursorHolder.DescendingTimestampCheckingOffset
static class	QueryableIndexCursorHolder.TimestampCheckingOffset

Constructor Summary

Constructors

Constructor	Description
QueryableIndexCursorHolder(QueryableIndex index, CursorBuildSpec cursorBuildSpec, TimeBoundaryInspector timeBoundaryInspector)

Method Summary

Modifier and Type	Method	Description
Cursor	asCursor()	Create a Cursor for use with non-vectorized query engines.
VectorCursor	asVectorCursor()	Compute filter to use for cursor creation.
boolean	canVectorize()	Returns true if this CursorHolder supports calling CursorHolder.asVectorCursor().
void	close()	Release any resources acquired by cursors.
List<OrderBy>	getOrdering()	Returns cursor ordering, which may or may not match CursorBuildSpec.getPreferredOrdering().
protected ColumnSelectorFactory	makeColumnSelectorFactoryForOffset(ColumnCache columnCache, Offset baseOffset)
protected VectorColumnSelectorFactory	makeVectorColumnSelectorFactoryForOffset(ColumnCache columnCache, VectorOffset baseOffset)

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.druid.segment.CursorHolder

getAggregatorsForPreAggregated, getTimeOrder, isPreAggregated

Constructor Details

QueryableIndexCursorHolder

public QueryableIndexCursorHolder(QueryableIndex index,
 CursorBuildSpec cursorBuildSpec,
 TimeBoundaryInspector timeBoundaryInspector)

Method Details

canVectorize

public boolean canVectorize()

Description copied from interface: CursorHolder

Returns true if this CursorHolder supports calling CursorHolder.asVectorCursor().

Specified by:

canVectorize in interface CursorHolder

asCursor

public Cursor asCursor()

Description copied from interface: CursorHolder

Create a Cursor for use with non-vectorized query engines.

Specified by:

asCursor in interface CursorHolder

asVectorCursor

@Nullable
public VectorCursor asVectorCursor()

Compute filter to use for cursor creation. For non-time-ordered segments, this includes the query interval as a filter.

Specified by:

asVectorCursor in interface CursorHolder

getOrdering

public List<OrderBy> getOrdering()

Description copied from interface: CursorHolder

Returns cursor ordering, which may or may not match CursorBuildSpec.getPreferredOrdering(). If returns an empty list then the cursor has no defined ordering.

Cursors associated with this holder return rows in this ordering, using the natural comparator for the column type. Includes ColumnHolder.TIME_COLUMN_NAME if appropriate.

Specified by:

getOrdering in interface CursorHolder

close

public void close()

Description copied from interface: CursorHolder

Release any resources acquired by cursors.

Specified by:

close in interface AutoCloseable

Specified by:

close in interface Closeable

Specified by:

close in interface CursorHolder

makeColumnSelectorFactoryForOffset

protected ColumnSelectorFactory makeColumnSelectorFactoryForOffset(ColumnCache columnCache,
 Offset baseOffset)

makeVectorColumnSelectorFactoryForOffset

protected VectorColumnSelectorFactory makeVectorColumnSelectorFactoryForOffset(ColumnCache columnCache,
 VectorOffset baseOffset)