org.apache.carbondata.datamap.bloom

Class BloomDataMapWriter

java.lang.Object

org.apache.carbondata.core.datamap.dev.DataMapWriter

org.apache.carbondata.datamap.bloom.AbstractBloomDataMapWriter

org.apache.carbondata.datamap.bloom.BloomDataMapWriter

@InterfaceAudience.Internal
public class BloomDataMapWriter
extends AbstractBloomDataMapWriter

BloomDataMap is constructed in CG level (blocklet level). For each indexed column, a bloom filter is constructed to indicate whether a value belongs to this blocklet. Bloom filter of blocklet that belongs to same block will be written to one index file suffixed with .bloomindex. So the number of bloom index file will be equal to that of the blocks.

Field Summary

Fields inherited from class org.apache.carbondata.datamap.bloom.AbstractBloomDataMapWriter

currentBlockletId, indexBloomFilters

Fields inherited from class org.apache.carbondata.core.datamap.dev.DataMapWriter

dataMapPath, indexColumns, segmentId, tablePath

Method Summary

Modifier and Type	Method and Description
protected byte[]	convertDictionaryValue(int indexColIdx, Object value)
protected byte[]	convertNonDictionaryValue(int indexColIdx, Object value)

Methods inherited from class org.apache.carbondata.datamap.bloom.AbstractBloomDataMapWriter

addValue2BloomIndex, finish, onBlockEnd, onBlockletEnd, onBlockletStart, onBlockStart, onPageAdded, releaseResouce, resetBloomFilters, writeBloomDataMapFile

Methods inherited from class org.apache.carbondata.core.datamap.dev.DataMapWriter

commitFile, getDefaultDataMapPath, getIndexColumns, isWritingFinished, setWritingFinished

Methods inherited from class java.lang.Object

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

Method Detail

convertNonDictionaryValue

protected byte[] convertNonDictionaryValue(int indexColIdx,
                                           Object value)

Specified by:

convertNonDictionaryValue in class AbstractBloomDataMapWriter

convertDictionaryValue

protected byte[] convertDictionaryValue(int indexColIdx,
                                        Object value)

Specified by:

convertDictionaryValue in class AbstractBloomDataMapWriter