Class CollectionEntryIndex
- java.lang.Object
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- org.apache.cassandra.index.internal.CassandraIndex
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- org.apache.cassandra.index.internal.composites.CollectionKeyIndexBase
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- org.apache.cassandra.index.internal.composites.CollectionEntryIndex
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- All Implemented Interfaces:
Index
public class CollectionEntryIndex extends CollectionKeyIndexBase
Index on the element and value of cells participating in a collection. The row keys for this index are a composite of the collection element and value of indexed columns.
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Nested Class Summary
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Nested classes/interfaces inherited from interface org.apache.cassandra.index.Index
Index.CollatedViewIndexBuildingSupport, Index.Group, Index.IndexBuildingSupport, Index.Indexer, Index.LoadType, Index.QueryPlan, Index.Searcher, Index.Status
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Field Summary
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Fields inherited from class org.apache.cassandra.index.internal.CassandraIndex
baseCfs, functions, indexCfs, indexedColumn, metadata, NAME
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Fields inherited from interface org.apache.cassandra.index.Index
INDEX_BUILDER_SUPPORT
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Constructor Summary
Constructors Constructor Description CollectionEntryIndex(ColumnFamilyStore baseCfs, IndexMetadata indexDef)
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description java.nio.ByteBuffer
getIndexedValue(java.nio.ByteBuffer partitionKey, Clustering<?> clustering, CellPath path, java.nio.ByteBuffer cellValue)
Extract the value to be inserted into the index from the components of the base databoolean
isStale(Row data, java.nio.ByteBuffer indexValue, long nowInSec)
Check whether a value retrieved from an index is still valid by comparing it to current row from the base table.-
Methods inherited from class org.apache.cassandra.index.internal.composites.CollectionKeyIndexBase
buildIndexClusteringPrefix, decodeEntry
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Methods inherited from class org.apache.cassandra.index.internal.CassandraIndex
customExpressionValueType, deleteStaleEntry, dependsOn, getBackingTable, getBlockingFlushTask, getEstimatedResultRows, getIndexCfs, getIndexComparator, getIndexedColumn, getIndexMetadata, getInitializationTask, getInvalidateTask, getMetadataReloadTask, getPostIndexQueryFilter, getTruncateTask, indexCfsMetadata, indexerFor, isQueryable, newIndex, register, searcherFor, shouldBuildBlocking, supportsExpression, supportsOperator, validate, validate
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Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
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Methods inherited from interface org.apache.cassandra.index.Index
filtersMultipleContains, getBlockingFlushTask, getBuildTaskSupport, getComponents, getFlushObserver, getPostQueryOrdering, getPreJoinTask, getRecoveryTaskSupport, getSupportedLoadTypeOnFailure, isSSTableAttached, unregister
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Constructor Detail
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CollectionEntryIndex
public CollectionEntryIndex(ColumnFamilyStore baseCfs, IndexMetadata indexDef)
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Method Detail
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getIndexedValue
public java.nio.ByteBuffer getIndexedValue(java.nio.ByteBuffer partitionKey, Clustering<?> clustering, CellPath path, java.nio.ByteBuffer cellValue)
Description copied from class:CassandraIndex
Extract the value to be inserted into the index from the components of the base data- Specified by:
getIndexedValue
in classCassandraIndex
- Parameters:
partitionKey
- from the primary dataclustering
- from the primary datapath
- from the primary datacellValue
- from the primary data- Returns:
- a ByteBuffer containing the value to be inserted in the index. This will be used to make the partition key in the index table
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isStale
public boolean isStale(Row data, java.nio.ByteBuffer indexValue, long nowInSec)
Description copied from class:CassandraIndex
Check whether a value retrieved from an index is still valid by comparing it to current row from the base table. Used at read time to identify out of date index entries so that they can be excluded from search results and repaired- Specified by:
isStale
in classCassandraIndex
- Parameters:
data
- the current row from the primary data tableindexValue
- the value we retrieved from the index- Returns:
- true if the index is out of date and the entry should be dropped
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