Struct SearchParams 

pub struct SearchParams {
    pub ivfflat_probes: Option<usize>,
    pub hnsw_ef_search: Option<usize>,
}

Configuration for setting pgvector search parameters.

These SET commands tune the behavior of approximate index scans.

Fields

ivfflat_probes: Option<usize>

Number of IVFFlat lists to probe (default: 1).

Higher values improve recall at the cost of speed.

hnsw_ef_search: Option<usize>

HNSW search ef parameter (default: 40).

Higher values improve recall at the cost of speed.

Implementations

impl SearchParams

pub fn new() -> Self

Create new search parameters.

pub fn probes(self, probes: usize) -> Self

Set the number of IVFFlat probes.

pub fn ef_search(self, ef: usize) -> Self

Set the HNSW ef_search parameter.

pub fn to_set_sql(&self) -> Vec<String>

Generate the SET commands for these parameters.

pub fn has_params(&self) -> bool

Check if any parameters are set.

Trait Implementations

impl Clone for SearchParams

fn clone(&self) -> SearchParams

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for SearchParams

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

Formats the value using the given formatter.

impl Default for SearchParams

fn default() -> Self

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for SearchParams

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for SearchParams

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.