org.apache.druid.segment

Interface Cursor

All Known Subinterfaces:

HistoricalCursor

All Known Implementing Classes:

ConcatCursor, FrameCursor, PostJoinCursor, RowBasedCursor, UnnestColumnValueSelectorCursor, UnnestDimensionCursor

public interface Cursor

Cursor is an interface for iteration over a range of data points, used during query execution. QueryableIndexCursorSequenceBuilder.QueryableIndexCursor is an implementation for historical segments, and IncrementalIndexStorageAdapter.IncrementalIndexCursor is an implementation for IncrementalIndex. Cursor is conceptually similar to TimeAndDimsPointer, but the latter is used for historical segment creation rather than query execution (as Cursor). If those abstractions could be collapsed (and if it is worthwhile) is yet to be determined.

See Also:

org.apache.druid.segment.vector.VectorCursor, the vectorized version

Method Summary

Modifier and Type	Method and Description
void	advance()
void	advanceUninterruptibly()
ColumnSelectorFactory	getColumnSelectorFactory()
org.joda.time.DateTime	getTime()
boolean	isDone()
boolean	isDoneOrInterrupted()
void	reset()

Method Detail

getColumnSelectorFactory

ColumnSelectorFactory getColumnSelectorFactory()

getTime

org.joda.time.DateTime getTime()

advance

void advance()

advanceUninterruptibly

void advanceUninterruptibly()

isDone

boolean isDone()

isDoneOrInterrupted

boolean isDoneOrInterrupted()

reset

void reset()