Enum IndexKind 

pub enum IndexKind {
    Bitmap,
    FmIndex,
    Ann,
    LearnedRange,
    MinHash,
    Sparse,
}

The kind of secondary index to maintain for a column. The primary-key index (in-memory HOT + on-disk learned PGM) is implicit and not listed here.

Variants

Bitmap

Roaring bitmap (value → row-id set). Low-cardinality equality / IN.

FmIndex

FM-index / wavelet tree for arbitrary substring + ranked access.

Ann

Quantized-vector ANN (binary / PQ). For Embedding columns.

LearnedRange

Learned zonemap (PGM) for ordered range predicates.

MinHash

MinHash/LSH set-similarity (AI dedup/join primitives).

Sparse

Learned-sparse (SPLADE-style) retrieval over weighted token vectors.

Trait Implementations

impl Clone for IndexKind

fn clone(&self) -> IndexKind

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for IndexKind

impl Debug for IndexKind

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for IndexKind

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for IndexKind

impl PartialEq for IndexKind

fn eq(&self, other: &IndexKind) -> 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 Serialize for IndexKind

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for IndexKind