Enum ChunkFormat 

pub enum ChunkFormat {
    Row,
    ColumnarV1,
}

On-disk storage format of a chunk — the read-bridge dispatch key (PRD #850 Phase 1, #861). After COLUMNAR is enabled on a collection that already holds row data, pre-existing chunks stay Row and new chunks seal ColumnarV1; the two coexist in the same collection and a read dispatches on this discriminant — Row to the entity/row reader, ColumnarV1 to the RDCC column-block reader — with no mass rewrite.

Variants

Row

Legacy row-stored chunk (columnar_page == None): it predates the columnar seal, or sealed while the collection was non-columnar. Its rows are served from the entity/row path.

ColumnarV1

Columnar RDCC chunk, format version 1 (columnar_page == Some). Its rows decode from the recorded ColumnBlock.

Trait Implementations

impl Clone for ChunkFormat

fn clone(&self) -> ChunkFormat

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for ChunkFormat

impl Debug for ChunkFormat

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

Formats the value using the given formatter.

impl Eq for ChunkFormat

impl PartialEq for ChunkFormat

fn eq(&self, other: &ChunkFormat) -> 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 StructuralPartialEq for ChunkFormat