Package org.apache.cassandra.index.sai.memory

Class MemtableIndex

java.lang.Object

org.apache.cassandra.index.sai.memory.MemtableIndex

All Implemented Interfaces:

MemtableOrdering

public class MemtableIndex
extends Object
implements MemtableOrdering

Constructor Summary

Constructors

Constructor	Description
MemtableIndex(StorageAttachedIndex index, Memtable memtable)

Method Summary

Modifier and Type	Method	Description
long	estimatedMemoryUsed()
ByteBuffer	getMaxTerm()
Memtable	getMemtable()
ByteBuffer	getMinTerm()
long	index(DecoratedKey key, Clustering<?> clustering, ByteBuffer value)
boolean	isEmpty()
Iterator<Pair<ByteComparable,PrimaryKeys>>	iterator()
CloseableIterator<PrimaryKeyWithScore>	orderBy(QueryContext queryContext, Expression orderer, AbstractBounds<PartitionPosition> keyRange)	Order the index based on the given orderer (expression).
CloseableIterator<PrimaryKeyWithScore>	orderResultsBy(QueryContext queryContext, List<PrimaryKey> results, Expression orderer)	Order the given list of PrimaryKey results corresponding to the given orderer.
KeyRangeIterator	search(QueryContext queryContext, Expression expression, AbstractBounds<PartitionPosition> keyRange)
long	update(DecoratedKey key, Clustering<?> clustering, ByteBuffer oldValue, ByteBuffer newValue)
long	writeCount()
SegmentMetadata.ComponentMetadataMap	writeDirect(IndexDescriptor indexDescriptor, IndexIdentifier indexIdentifier, Function<PrimaryKey,Integer> postingTransformer)

Methods inherited from class java.lang.Object

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

Constructor Details

MemtableIndex

public MemtableIndex(StorageAttachedIndex index,
 Memtable memtable)

Method Details

writeCount

public long writeCount()

estimatedMemoryUsed

public long estimatedMemoryUsed()

isEmpty

public boolean isEmpty()

getMemtable

public Memtable getMemtable()

getMinTerm

public ByteBuffer getMinTerm()

getMaxTerm

public ByteBuffer getMaxTerm()

index

public long index(DecoratedKey key,
 Clustering<?> clustering,
 ByteBuffer value)

update

public long update(DecoratedKey key,
 Clustering<?> clustering,
 ByteBuffer oldValue,
 ByteBuffer newValue)

search

public KeyRangeIterator search(QueryContext queryContext,
 Expression expression,
 AbstractBounds<PartitionPosition> keyRange)

iterator

public Iterator<Pair<ByteComparable,PrimaryKeys>> iterator()

writeDirect

public SegmentMetadata.ComponentMetadataMap writeDirect(IndexDescriptor indexDescriptor,
 IndexIdentifier indexIdentifier,
 Function<PrimaryKey,Integer> postingTransformer)
                                                 throws IOException

Throws:

IOException

orderBy

public CloseableIterator<PrimaryKeyWithScore> orderBy(QueryContext queryContext,
 Expression orderer,
 AbstractBounds<PartitionPosition> keyRange)

Description copied from interface: MemtableOrdering

Order the index based on the given orderer (expression).

Specified by:

orderBy in interface MemtableOrdering

Parameters:

queryContext - - the query context

orderer - - the expression to order by

keyRange - - the key range to search

Returns:

an iterator over the results in score order.

orderResultsBy

public CloseableIterator<PrimaryKeyWithScore> orderResultsBy(QueryContext queryContext,
 List<PrimaryKey> results,
 Expression orderer)

Description copied from interface: MemtableOrdering

Order the given list of PrimaryKey results corresponding to the given orderer. Returns an iterator over the results in score order. Assumes that the given spans the same rows as the implementing index's segment.

Specified by:

orderResultsBy in interface MemtableOrdering