Struct AppendOnlyCollection 

pub struct AppendOnlyCollection { /* private fields */ }

The append-only collection: the sole source of truth for this slice. Rows are appended in strictly increasing LSN order; the write path only ever grows this log and never touches columnar state (ADR 0069 §2).

Implementations

impl AppendOnlyCollection

pub fn new(schema: ProjectionSchema) -> AppendOnlyCollection

pub fn schema(&self) -> &ProjectionSchema

pub fn latest_lsn(&self) -> u64

The highest LSN committed so far (0 when empty). A caller pins this to scan “as of now”.

pub fn append( &mut self, lsn: u64, row: Vec<Value>, ) -> Result<(), ProjectionError>

Append one row at lsn. This is the transactional write path: it grows the row log only — never the columnar projection.

pub fn row_scan(&self, pinned_lsn: u64) -> Vec<Vec<Value>>

The row read path — the equivalence oracle. Returns every row visible at pinned_lsn (lsn ≤ pinned), in commit order. This is what an ordinary MVCC snapshot scan would yield.

Trait Implementations

impl Clone for AppendOnlyCollection

fn clone(&self) -> AppendOnlyCollection

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for AppendOnlyCollection

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

Formats the value using the given formatter.