Struct GlobalStats 

pub struct GlobalStats { /* private fields */ }

Global statistics aggregated across all segments

Used for consistent IDF computation in multi-segment indexes. Statistics are cached and invalidated when segments change.

Implementations

impl GlobalStats

pub fn new() -> Self

Create empty stats

pub fn total_docs(&self) -> u64

Total documents in the index

pub fn sparse_idf(&self, field: Field, dim_id: u32) -> f32

Compute IDF for a sparse vector dimension

IDF = ln(N / df) where N = total docs, df = docs containing dimension

pub fn sparse_idf_weights(&self, field: Field, dim_ids: &[u32]) -> Vec<f32>

Compute IDF weights for multiple sparse dimensions

pub fn text_idf(&self, field: Field, term: &str) -> f32

Compute IDF for a full-text term

IDF = ln((N - df + 0.5) / (df + 0.5) + 1) (BM25 variant)

pub fn avg_field_len(&self, field: Field) -> f32

Get average field length for BM25

pub fn generation(&self) -> u64

Current generation (for cache invalidation)

Trait Implementations

impl Debug for GlobalStats

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for GlobalStats

fn default() -> Self

Returns the “default value” for a type.