@EverythingIsNonnullByDefault

Package org.apache.druid.segment.column

Interface Summary

Interface	Description
BaseColumn
BitmapColumnIndex
ColumnCapabilities	This interface is used to expose information about columns that is interesting to know for all matters dealing with reading from columns, including query planning and optimization, creating readers to merge segments at ingestion time, and probably nearly anything else you can imagine.
ColumnCapabilities.CoercionLogic	This interface defines the shape of a mechnism to allow for bespoke coercion of ColumnCapabilities.Capable.UNKNOWN into ColumnCapabilities.Capable.TRUE or ColumnCapabilities.Capable.FALSE for each ColumnCapabilities.Capable of a ColumnCapabilities, as is appropriate for the situation of the caller.
ColumnConfig
ColumnHolder
ColumnIndexCapabilities	Sort of like ColumnCapabilities, except for indexes supplied by ColumnIndexSelector, provides information for how query processing may use indexes.
ColumnIndexSupplier	Provides indexes and information about them (ColumnIndexCapabilities) for a column.
ComplexColumn	This interface represents a complex column and can be implemented by druid extension writer of a custom column with arbitrary serialization instead of a custom column that serializes rows of objects serialized using GenericIndexed class which is default implementation of "writeToXXX" methods in ComplexColumnSerializer.
DictionaryEncodedColumn<ActualType extends Comparable<? super ActualType>>
DictionaryEncodedStringValueIndex	This exposes a 'raw' view into bitmap value indexes of a string DictionaryEncodedColumn.
DictionaryEncodedValueIndex	This exposes a 'raw' view into bitmap value indexes for DictionaryEncodedColumn.
DruidPredicateIndex	Uses a DruidPredicateFactory to construct a BitmapColumnIndex
LexicographicalRangeIndex	An optimized column value BitmapColumnIndex provider for columns which are stored in 'lexicographical' order, allowing short-circuit processing of string value ranges.
NullValueIndex	Provides index for all null rows in a column, to use with IS/IS NOT NULL filters
NumericColumn
NumericRangeIndex	An optimized column value BitmapColumnIndex provider for specialized processing of numeric value ranges.
SpatialIndex
StringEncodingStrategy
StringValueSetIndex	Index on individual values, and provides bitmaps for the rows which contain these values
Utf8ValueSetIndex

Class Summary

Class	Description
AllFalseBitmapColumnIndex
AllTrueBitmapColumnIndex
ColumnBuilder
ColumnCapabilitiesImpl
ColumnDescriptor
ColumnDescriptor.Builder
DoublesColumn
FloatsColumn
GenericIndexedBasedComplexColumn	Implementation of ComplexColumn to be used when complex column serialization is done by using GenericIndexed by using default implementations of "writeToXXX" methods in ComplexColumnSerializer
IndexedStringDictionaryEncodedStringValueIndex<TDictionary extends Indexed<String>>
IndexedStringDruidPredicateIndex<TDictionary extends Indexed<String>>
IndexedUtf8LexicographicalRangeIndex<TDictionary extends Indexed<ByteBuffer>>
IndexedUtf8ValueSetIndex<TDictionary extends Indexed<ByteBuffer>>
LongsColumn
ObjectStrategyComplexTypeStrategy<T>	Default implementation of TypeStrategy for all ComplexMetricSerde implementations that just wraps the ObjectStrategy they are required to implement.
RowSignature	Type signature for a row in a Druid datasource or query result.
RowSignature.Builder
SimpleBitmapColumnIndex	BitmapColumnIndex with Druids "default" ColumnIndexCapabilities.
SimpleColumnIndexCapabilities
SimpleImmutableBitmapIndex	SimpleBitmapColumnIndex which wraps a single ImmutableBitmap
SimpleImmutableBitmapIterableIndex	SimpleBitmapColumnIndex for anything which can compute an Iterable in some manner
StringDictionaryEncodedColumn
StringDictionaryEncodedColumn.MultiValueStringVectorObjectSelector	Base type for a VectorObjectSelector for a dictionary encoded ColumnType.STRING built around a ColumnarMultiInts.
StringDictionaryEncodedColumn.StringMultiValueDimensionVectorSelector	Base type for a MultiValueDimensionVectorSelector for a dictionary encoded ColumnType.STRING built around a ColumnarMultiInts.
StringDictionaryEncodedColumn.StringSingleValueDimensionVectorSelector	Base type for a SingleValueDimensionVectorSelector for a dictionary encoded ColumnType.STRING built around a ColumnarInts.
StringDictionaryEncodedColumn.StringVectorObjectSelector	Base type for a VectorObjectSelector for a dictionary encoded ColumnType.STRING built around a ColumnarInts.
StringEncodingStrategies
StringEncodingStrategies.Utf8ToStringIndexed	Adapter to convert Indexed with utf8 encoded bytes into Indexed to be friendly to consumers.
StringEncodingStrategy.FrontCoded
StringEncodingStrategy.Utf8
StringFrontCodedDictionaryEncodedColumn	DictionaryEncodedColumn for a column which uses a FrontCodedIndexed to store its value dictionary, which 'delta encodes' strings (instead of GenericIndexed like StringDictionaryEncodedColumn).
UnknownTypeComplexColumn
ValueTypes

Enum Summary

Enum	Description
ColumnCapabilities.Capable
RowSignature.Finalization