[−][src]Module tantivy::fastfield

Column oriented field storage for tantivy.

It is the equivalent of Lucene's DocValues.

Fast fields is a column-oriented fashion storage of tantivy.

It is designed for the fast random access of some document fields given a document id.

FastField are useful when a field is required for all or most of the DocSet : for instance for scoring, grouping, filtering, or faceting.

Fields have to be declared as FAST in the schema. Currently only 64-bits integers (signed or unsigned) are supported.

They are stored in a bit-packed fashion so that their memory usage is directly linear with the amplitude of the values stored.

Read access performance is comparable to that of an array lookup.

Structs

BytesFastFieldReader	Reader for byte array fast fields
BytesFastFieldWriter	Writer for byte array (as in, any number of bytes per document) fast fields
DeleteBitSet	Set of deleted `DocId`s.
FacetReader	The facet reader makes it possible to access the list of facets associated to a given document in a specific segment.
FastFieldNotAvailableError	`FastFieldNotAvailableError` is returned when the user requested for a fast field reader, and the field was not defined in the schema as a fast field.
FastFieldReader	Trait for accessing a fastfield.
FastFieldReaders	Provides access to all of the FastFieldReader.
FastFieldSerializer	`FastFieldSerializer` is in charge of serializing fastfields on disk.
FastFieldsWriter	The fastfieldswriter regroup all of the fast field writers.
IntFastFieldWriter	Fast field writer for ints. The fast field writer just keeps the values in memory.
MultiValueIntFastFieldReader	Reader for a multivalued `u64` fast field.
MultiValueIntFastFieldWriter	Writer for multi-valued (as in, more than one value per document) int fast field.

Trait for types that are allowed for fast fields: (u64 or i64).

Write a delete BitSet

Result when trying to access a fast field reader.