Struct QueryMeta 

#[repr(C)]
pub struct QueryMeta {
    pub inner_product_correction: f32,
    pub bit_sum: f32,
    pub offset: f32,
    pub metric_specific: f32,
}

Scalar quantization correction factors for computing distances between scalar quantized queries and spherically quantized data elements.

Computing the distance between a query and a data vector uses the same forumla derived in the module level documentation.

The one difference is that the query must explicitly carry the “offset” term as it cannot be derived from the number of bits used for the compression.

Fields

inner_product_correction: f32

The value with which to scale the bit-level inner product with the 1-bit data data vectors.

bit_sum: f32

Scaling factor for the DataMeta::twice_contraction. Applied separately to still allow 1-bit vectors using DataMeta to compute distances with eachother efficiently.

offset: f32

The query-specific offset, taking into account the scaling factor for the query as well as its minimum value. See the struct-level documentation for an explanation.

metric_specific: f32

The corresponding metric specific term as DataMeta.

Trait Implementations

impl Clone for QueryMeta

fn clone(&self) -> QueryMeta

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for QueryMeta

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

Formats the value using the given formatter.

impl Default for QueryMeta

fn default() -> QueryMeta

Returns the “default value” for a type.

impl PartialEq for QueryMeta

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Zeroable for QueryMeta

fn zeroed() -> Self

Calls zeroed.

impl Copy for QueryMeta

impl Pod for QueryMeta

impl StructuralPartialEq for QueryMeta