org.apache.carbondata.datamap.bloom

Class BloomCoarseGrainDataMap

java.lang.Object

org.apache.carbondata.core.datamap.dev.cgdatamap.CoarseGrainDataMap

org.apache.carbondata.datamap.bloom.BloomCoarseGrainDataMap

All Implemented Interfaces:

DataMap<Blocklet>

@InterfaceAudience.Internal
public class BloomCoarseGrainDataMap
extends CoarseGrainDataMap

BloomDataCoarseGrainMap is constructed in blocklet level. For each indexed column, a bloom filter is constructed to indicate whether a value belongs to this blocklet. More information of the index file can be found in the corresponding datamap writer.

Field Summary

Fields

Modifier and Type	Field and Description
static String	BLOOM_INDEX_SUFFIX

Constructor Summary

Constructors

Constructor and Description
BloomCoarseGrainDataMap()

Method Summary

Modifier and Type	Method and Description
void	clear()
void	finish()
static String	getBloomIndexFile(String shardPath, String colName) get bloom index file
void	init(DataMapModel dataMapModel)
boolean	isScanRequired(FilterResolverIntf filterExp)
List<Blocklet>	prune(FilterResolverIntf filterExp, SegmentProperties segmentProperties, List<PartitionSpec> partitions)
void	setIndexedColumn(Set<String> indexedColumn)

Methods inherited from class java.lang.Object

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

Field Detail

BLOOM_INDEX_SUFFIX

public static final String BLOOM_INDEX_SUFFIX

See Also:

Constant Field Values

Constructor Detail

BloomCoarseGrainDataMap

public BloomCoarseGrainDataMap()

Method Detail

init

public void init(DataMapModel dataMapModel)
          throws IOException

Throws:

IOException

setIndexedColumn

public void setIndexedColumn(Set<String> indexedColumn)

prune

public List<Blocklet> prune(FilterResolverIntf filterExp,
                            SegmentProperties segmentProperties,
                            List<PartitionSpec> partitions)

isScanRequired

public boolean isScanRequired(FilterResolverIntf filterExp)

clear

public void clear()

getBloomIndexFile

public static String getBloomIndexFile(String shardPath,
                                       String colName)

get bloom index file

Parameters:

shardPath - path for the shard

colName - index column name

finish

public void finish()