Enum lance_index::scalar::ScalarQuery

pub enum ScalarQuery {
    Range(Bound<ScalarValue>, Bound<ScalarValue>),
    IsIn(Vec<ScalarValue>),
    Equals(ScalarValue),
    IsNull(),
}

A query that a scalar index can satisfy

This is a subset of expression operators that is often referred to as the “sargable” operators

Note that negation is not included. Negation should be applied later. For example, to invert an equality query (e.g. all rows where the value is not 7) you can grab all rows where the value = 7 and then do an inverted take (or use a block list instead of an allow list for prefiltering)

Variants

Range(Bound<ScalarValue>, Bound<ScalarValue>)

Retrieve all row ids where the value is in the given [min, max) range

IsIn(Vec<ScalarValue>)

Retrieve all row ids where the value is in the given set of values

Equals(ScalarValue)

Retrieve all row ids where the value is exactly the given value

IsNull()

Retrieve all row ids where the value is null

Implementations

impl ScalarQuery

pub fn to_expr(&self, col: String) -> Expr

pub fn fmt_with_col(&self, col: &str) -> String

Trait Implementations

impl Clone for ScalarQuery

fn clone(&self) -> ScalarQuery

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for ScalarQuery

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

Formats the value using the given formatter.

impl PartialEq for ScalarQuery

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

This method tests for self and other values to be equal, and is used by ==.

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

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

impl StructuralPartialEq for ScalarQuery