org.apache.druid.segment.index.semantic

Interface DictionaryEncodedStringValueIndex

All Superinterfaces:

DictionaryEncodedValueIndex

All Known Implementing Classes:

IndexedStringDictionaryEncodedStringValueIndex

public interface DictionaryEncodedStringValueIndex
extends DictionaryEncodedValueIndex

This exposes a 'raw' view into bitmap value indexes of a string DictionaryEncodedColumn. This allows callers to directly retrieve bitmaps via dictionary ids, as well as access to lower level details of such a column like value lookup and value cardinality. Most filter implementations should likely be using higher level index instead, such as StringValueSetIndexes, LexicographicalRangeIndexes, NumericRangeIndexes, or DruidPredicateIndexes

Method Summary

Modifier and Type	Method and Description
BitmapFactory	getBitmapFactory()
int	getCardinality() Get the cardinality of the underlying value dictionary
String	getValue(int index) Get the value in the underlying value dictionary of the specified dictionary id

Methods inherited from interface org.apache.druid.segment.index.semantic.DictionaryEncodedValueIndex

getBitmap

Method Detail

getCardinality

int getCardinality()

Get the cardinality of the underlying value dictionary

getValue

@Nullable
String getValue(int index)

Get the value in the underlying value dictionary of the specified dictionary id

getBitmapFactory

BitmapFactory getBitmapFactory()