org.apache.cassandra.db.index.composites

Class CompositesIndexOnClusteringKey

java.lang.Object

org.apache.cassandra.db.index.SecondaryIndex

org.apache.cassandra.db.index.PerColumnSecondaryIndex

org.apache.cassandra.db.index.AbstractSimplePerColumnSecondaryIndex

org.apache.cassandra.db.index.composites.CompositesIndex

org.apache.cassandra.db.index.composites.CompositesIndexOnClusteringKey

public class CompositesIndexOnClusteringKey
extends CompositesIndex

Index on a CLUSTERING_COLUMN column definition. A cell indexed by this index will have the general form: ck_0 ... ck_n c_name : v where ck_i are the cluster keys, c_name the last component of the cell composite name (or second to last if collections are in use, but this has no impact) and v the cell value. Such a cell is always indexed by this index (or rather, it is indexed if n >= columnDef.componentIndex, which will always be the case in practice) and it will generate (makeIndexColumnName()) an index entry whose: - row key will be ck_i (getIndexedValue()) where i == columnDef.componentIndex. - cell name will rk ck_0 ... ck_{i-1} ck_{i+1} ck_n where rk is the row key of the initial cell and i == columnDef.componentIndex.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.cassandra.db.index.composites.CompositesIndex

CompositesIndex.IndexedEntry

Field Summary

Fields inherited from class org.apache.cassandra.db.index.AbstractSimplePerColumnSecondaryIndex

columnDef, indexCfs

Fields inherited from class org.apache.cassandra.db.index.SecondaryIndex

baseCfs, columnDefs, CUSTOM_INDEX_OPTION_NAME, keyComparator, logger

Constructor Summary

Constructors

Constructor and Description
CompositesIndexOnClusteringKey()

Method Summary

Methods

Modifier and Type	Method and Description
static CellNameType	buildIndexComparator(CFMetaData baseMetadata, ColumnDefinition columnDef)
CompositesIndex.IndexedEntry	decodeEntry(DecoratedKey indexedValue, Cell indexEntry)
protected java.nio.ByteBuffer	getIndexedValue(java.nio.ByteBuffer rowKey, Cell cell)
boolean	indexes(CellName name) Returns true if the provided cell name is indexed by this secondary index.
boolean	isStale(CompositesIndex.IndexedEntry entry, ColumnFamily data, long now)
protected Composite	makeIndexColumnPrefix(java.nio.ByteBuffer rowKey, Composite columnName)

Methods inherited from class org.apache.cassandra.db.index.composites.CompositesIndex

create, createSecondaryIndexSearcher, delete, getExpressionComparator, getIndexComparator, getIndexComparator, makeIndexColumnName, validateOptions

Methods inherited from class org.apache.cassandra.db.index.AbstractSimplePerColumnSecondaryIndex

delete, estimateResultRows, expressionString, forceBlockingFlush, getIndexCfs, getIndexKeyComparator, getIndexKeyFor, getIndexName, init, insert, invalidate, reload, removeIndex, truncateBlocking, update

Methods inherited from class org.apache.cassandra.db.index.PerColumnSecondaryIndex

getNameForSystemKeyspace, validate

Methods inherited from class org.apache.cassandra.db.index.SecondaryIndex

buildIndexAsync, buildIndexBlocking, createInstance, getBaseCfs, getColumnDefs, isIndexBuilt, setIndexBuilt, setIndexRemoved

Methods inherited from class java.lang.Object

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

Constructor Detail

CompositesIndexOnClusteringKey

public CompositesIndexOnClusteringKey()

Method Detail

buildIndexComparator

public static CellNameType buildIndexComparator(CFMetaData baseMetadata,
                                ColumnDefinition columnDef)

getIndexedValue

protected java.nio.ByteBuffer getIndexedValue(java.nio.ByteBuffer rowKey,
                                  Cell cell)

Specified by:

getIndexedValue in class AbstractSimplePerColumnSecondaryIndex

makeIndexColumnPrefix

protected Composite makeIndexColumnPrefix(java.nio.ByteBuffer rowKey,
                              Composite columnName)

Specified by:

makeIndexColumnPrefix in class CompositesIndex

decodeEntry

public CompositesIndex.IndexedEntry decodeEntry(DecoratedKey indexedValue,
                                       Cell indexEntry)

Specified by:

decodeEntry in class CompositesIndex

indexes

public boolean indexes(CellName name)

Description copied from class: SecondaryIndex

Returns true if the provided cell name is indexed by this secondary index.

Specified by:

indexes in class SecondaryIndex

isStale

public boolean isStale(CompositesIndex.IndexedEntry entry,
              ColumnFamily data,
              long now)

Specified by:

isStale in class CompositesIndex