Struct MiniBlockLayout 

pub struct MiniBlockLayout {
    pub rep_compression: Option<CompressiveEncoding>,
    pub def_compression: Option<CompressiveEncoding>,
    pub value_compression: Option<CompressiveEncoding>,
    pub dictionary: Option<CompressiveEncoding>,
    pub num_dictionary_items: u64,
    pub layers: Vec<i32>,
    pub num_buffers: u64,
    pub repetition_index_depth: u32,
    pub num_items: u64,
    pub has_large_chunk: bool,
}

Buffer and row accounting needed by the mini-block engine.

Fields

rep_compression: Option<CompressiveEncoding>

Repetition stream encoding; absent when no repetition buffer exists.

def_compression: Option<CompressiveEncoding>

Definition stream encoding; absent when no definition buffer exists.

value_compression: Option<CompressiveEncoding>

Value encoding, required for engines that materialize values.

dictionary: Option<CompressiveEncoding>

Page dictionary encoding; absent when chunks do not share a dictionary.

num_dictionary_items: u64

Number of entries in the page dictionary.

layers: Vec<i32>

Inner-most to outer-most repetition/definition interpretations.

num_buffers: u64

Value buffers per chunk, excluding repetition and definition streams.

repetition_index_depth: u32

Number of list layers represented by the repetition index.

num_items: u64

Number of structural events, including invisible entries.

has_large_chunk: bool

Selects u32 chunk metadata; false selects the stable u16 representation.

Trait Implementations

impl Clone for MiniBlockLayout

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for MiniBlockLayout

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

Formats the value using the given formatter.

impl Default for MiniBlockLayout

fn default() -> Self

Returns the “default value” for a type.

impl From<MiniBlockLayout> for MiniBlockLayout

fn from(value: MiniBlockLayout) -> Self

Converts to this type from the input type.

impl PartialEq for MiniBlockLayout

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for MiniBlockLayout

impl TryFrom<MiniBlockLayout> for MiniBlockLayout

type Error = Error

The type returned in the event of a conversion error.

fn try_from(value: MiniBlockLayout) -> Result<Self>

Performs the conversion.