Struct HybridConfig 

pub struct HybridConfig {
    pub query_text: String,
    pub text_columns: Vec<String>,
    pub bm25_weight: f32,
    pub fusion: HybridFusion,
    pub candidate_pool: Option<usize>,
}

Configuration for hybrid vector+BM25 search.

Fields

query_text: String

Raw text query. Tokenized internally for BM25 scoring.

text_columns: Vec<String>

Parquet column(s) containing the text to score. Typically ["chunk_text"]. When multiple columns are given, texts are concatenated with a space separator.

bm25_weight: f32

BM25 weight in RRF fusion (0.0–1.0). Vector weight = 1.0 - bm25_weight in Linear mode. In Rrf mode, both weights scale their respective RRF rank term.

fusion: HybridFusion

Fusion strategy. Default: Rrf.

candidate_pool: Option<usize>

Minimum number of HNSW candidates to fetch before BM25 re-ranking. Ensures the BM25 pool is large enough to find lexically relevant results. Defaults to max(rerank_factor * top_k, 10 * top_k) if not set.

Implementations

impl HybridConfig

pub fn new(query_text: impl Into<String>) -> Self

pub fn with_text_column(self, col: impl Into<String>) -> Self

pub fn with_text_columns(self, cols: Vec<String>) -> Self

pub fn with_bm25_weight(self, w: f32) -> Self

pub fn with_fusion(self, fusion: HybridFusion) -> Self

pub fn with_candidate_pool(self, n: usize) -> Self

Trait Implementations

impl Clone for HybridConfig

fn clone(&self) -> HybridConfig

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for HybridConfig

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

Formats the value using the given formatter.

impl Default for HybridConfig

fn default() -> Self

Returns the “default value” for a type.