Enum Encoding 

#[repr(u8)]
pub enum Encoding {
    Plain = 0,
    Dictionary = 1,
    Delta = 2,
    ByteStreamSplit = 3,
    RunLength = 4,
    BinaryQuantized = 5,
    Zstd = 6,
}

On-disk page encoding. Mirrors the strategies used by modern columnar formats, plus BinaryQuantized for AI embedding columns.

Variants

Plain = 0

Dictionary = 1

Delta = 2

ByteStreamSplit = 3

RunLength = 4

BinaryQuantized = 5

1 bit per dimension; similarity via SIMD popcount(XOR).

Zstd = 6

Plain-encode then zstd-compress (default for fixed-width and high-card columns).

Trait Implementations

impl Clone for Encoding

fn clone(&self) -> Encoding

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Encoding

impl Debug for Encoding

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for Encoding

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for Encoding

impl PartialEq for Encoding

fn eq(&self, other: &Encoding) -> 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 Encoding

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 Encoding