Package io.trino.orc

Class DictionaryCompressionOptimizer

java.lang.Object

io.trino.orc.DictionaryCompressionOptimizer

public class DictionaryCompressionOptimizer
extends Object

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static interface	DictionaryCompressionOptimizer.DictionaryColumn

Constructor Summary

Constructors

Constructor	Description
DictionaryCompressionOptimizer(Set<? extends DictionaryCompressionOptimizer.DictionaryColumn> writers, int stripeMinBytes, int stripeMaxBytes, int stripeMaxRowCount, int dictionaryMemoryMaxBytes)

Method Summary

Modifier and Type	Method	Description
static int	estimateIndexBytesPerValue(int dictionaryEntries)
void	finalOptimize(int bufferedBytes)
int	getDictionaryMemoryBytes()
boolean	isFull(long bufferedBytes)
void	optimize(int bufferedBytes, int stripeRowCount)
void	reset()

Methods inherited from class java.lang.Object

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

Constructor Detail

DictionaryCompressionOptimizer

public DictionaryCompressionOptimizer(Set<? extends DictionaryCompressionOptimizer.DictionaryColumn> writers,
                                      int stripeMinBytes,
                                      int stripeMaxBytes,
                                      int stripeMaxRowCount,
                                      int dictionaryMemoryMaxBytes)

Method Detail

getDictionaryMemoryBytes

public int getDictionaryMemoryBytes()

isFull

public boolean isFull(long bufferedBytes)

reset

public void reset()

finalOptimize

public void finalOptimize(int bufferedBytes)

optimize

public void optimize(int bufferedBytes,
                     int stripeRowCount)

estimateIndexBytesPerValue

public static int estimateIndexBytesPerValue(int dictionaryEntries)