Struct Bm25fQueryPlan 

pub struct Bm25fQueryPlan {
    pub weights: Bm25fFieldWeights,
    pub b: f64,
    pub k1: f64,
}

F5 (0.8.14 Slice 10) — the compiled BM25F query plan for the fielded lexical arm (ADR-0.8.1 §3.2 BM25fQueryPlan). Carries the tunable per-field weights and the tunable length-normalization b (and the term-saturation k1).

NOTE on b: SQLite FTS5’s built-in bm25() auxiliary function pins its internal k1/b and exposes ONLY per-column weights — it cannot express a tunable b. So the score is computed in-engine (a textbook BM25F over the FTS5-recalled candidates) rather than delegated to the built-in bm25(): that is what makes b (and k1) genuinely tunable here, not a dead parameter. The search_index_v2 FTS5 index is still load-bearing — it does the candidate recall (MATCH) that the scorer then ranks.

Defaults match Robertson/SQLite BM25 (b = 0.75, k1 = 1.2) with uniform field weights. Engine-internal for 0.8.14 (no SDK surface).

Fields

weights: Bm25fFieldWeights

b: f64

k1: f64

Trait Implementations

impl Clone for Bm25fQueryPlan

fn clone(&self) -> Bm25fQueryPlan

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Bm25fQueryPlan

impl Debug for Bm25fQueryPlan

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

Formats the value using the given formatter.

impl Default for Bm25fQueryPlan

fn default() -> Self

Returns the “default value” for a type.

impl PartialEq for Bm25fQueryPlan

fn eq(&self, other: &Bm25fQueryPlan) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for Bm25fQueryPlan