Package org.apache.cassandra.db.partitions

Interface UnfilteredPartitionIterators.MergeListener

All Known Implementing Classes:

PartitionIteratorMergeListener

Enclosing class:

UnfilteredPartitionIterators

public static interface UnfilteredPartitionIterators.MergeListener

Field Summary

Fields

Modifier and Type	Field	Description
static final UnfilteredPartitionIterators.MergeListener	NOOP

Method Summary

Modifier and Type	Method	Description
default void	close()
UnfilteredRowIterators.MergeListener	getRowMergeListener(DecoratedKey partitionKey, List<UnfilteredRowIterator> versions)
default boolean	preserveOrder()	Returns true if the merger needs to preserve the position of sources within the merge when passing data to the listener.

Field Details

NOOP

static final UnfilteredPartitionIterators.MergeListener NOOP

Method Details

preserveOrder

default boolean preserveOrder()

Returns true if the merger needs to preserve the position of sources within the merge when passing data to the listener. If false, the merger can avoid creating empty sources for non-present partitions and significantly speed up processing.

Returns:

True to preserve position of source iterators.

getRowMergeListener

UnfilteredRowIterators.MergeListener getRowMergeListener(DecoratedKey partitionKey,
 List<UnfilteredRowIterator> versions)

close

default void close()