Package org.apache.pinot.segment.local.segment.index.readers.forward

Class FixedBitMVForwardIndexReader

java.lang.Object

org.apache.pinot.segment.local.segment.index.readers.forward.FixedBitMVForwardIndexReader

All Implemented Interfaces:

Closeable, AutoCloseable, IndexReader, ForwardIndexReader<FixedBitMVForwardIndexReader.Context>

public final class FixedBitMVForwardIndexReader
extends Object
implements ForwardIndexReader<FixedBitMVForwardIndexReader.Context>

Bit-compressed dictionary-encoded forward index reader for multi-value columns. The values returned are dictionary ids.

Storage Layout:

• There will be three sections: CHUNK OFFSET, BITMAP and RAW DATA.
• CHUNK OFFSET contains the start offset of each chunk.
• BITMAP contains sequence of bits. The number of bits equals to the total number of values. The number of set bits equals to the number of rows. A bit is set if it is the start of a new row.
• RAW DATA contains the bit compressed values. We divide RAW DATA into chunks, where each chunk has the same number of rows.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	FixedBitMVForwardIndexReader.Context

Constructor Summary

Constructors

Constructor	Description
FixedBitMVForwardIndexReader(PinotDataBuffer dataBuffer, int numDocs, int numValues, int numBitsPerValue)

Method Summary

Modifier and Type	Method	Description
void	close()
FixedBitMVForwardIndexReader.Context	createContext()
int	getDictIdMV(int docId, int[] dictIdBuffer, FixedBitMVForwardIndexReader.Context context)
int[]	getDictIdMV(int docId, FixedBitMVForwardIndexReader.Context context)
int	getNumValuesMV(int docId, FixedBitMVForwardIndexReader.Context context)
FieldSpec.DataType	getStoredType()
boolean	isDictionaryEncoded()
boolean	isSingleValue()

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.pinot.segment.spi.index.reader.ForwardIndexReader

getBigDecimal, getBytes, getBytesMV, getBytesMV, getCompressionType, getDictId, getDouble, getDoubleMV, getDoubleMV, getFloat, getFloatMV, getFloatMV, getInt, getIntMV, getIntMV, getLengthOfLongestEntry, getLong, getLongMV, getLongMV, getString, getStringMV, getStringMV, readDictIds, readValuesMV, readValuesMV, readValuesMV, readValuesMV, readValuesMV, readValuesMV, readValuesSV, readValuesSV, readValuesSV, readValuesSV, readValuesSV

Constructor Detail

FixedBitMVForwardIndexReader

public FixedBitMVForwardIndexReader(PinotDataBuffer dataBuffer,
                                    int numDocs,
                                    int numValues,
                                    int numBitsPerValue)

Method Detail

isDictionaryEncoded

public boolean isDictionaryEncoded()

Specified by:

isDictionaryEncoded in interface ForwardIndexReader<FixedBitMVForwardIndexReader.Context>

isSingleValue

public boolean isSingleValue()

Specified by:

isSingleValue in interface ForwardIndexReader<FixedBitMVForwardIndexReader.Context>

getStoredType

public FieldSpec.DataType getStoredType()

Specified by:

getStoredType in interface ForwardIndexReader<FixedBitMVForwardIndexReader.Context>

createContext

public FixedBitMVForwardIndexReader.Context createContext()

Specified by:

createContext in interface ForwardIndexReader<FixedBitMVForwardIndexReader.Context>

getDictIdMV

public int getDictIdMV(int docId,
                       int[] dictIdBuffer,
                       FixedBitMVForwardIndexReader.Context context)

Specified by:

getDictIdMV in interface ForwardIndexReader<FixedBitMVForwardIndexReader.Context>

getDictIdMV

public int[] getDictIdMV(int docId,
                         FixedBitMVForwardIndexReader.Context context)

Specified by:

getDictIdMV in interface ForwardIndexReader<FixedBitMVForwardIndexReader.Context>

getNumValuesMV

public int getNumValuesMV(int docId,
                          FixedBitMVForwardIndexReader.Context context)

Specified by:

getNumValuesMV in interface ForwardIndexReader<FixedBitMVForwardIndexReader.Context>

close

public void close()

Specified by:

close in interface AutoCloseable

Specified by:

close in interface Closeable