Struct ReadGeneration 

pub struct ReadGeneration { /* private fields */ }

S1C-001: an immutable, atomically-published table read view — the engine-layer counterpart of database::TableReadGeneration. Readers pin an Arc<ReadGeneration>; writers publish a replacement with a single ArcSwap store (Table::publish_read_generation) after sealing their active deltas, so no write ever clones the complete table/index set merely because readers exist: every captured piece is either an Arc share of immutable frozen layers or a small metadata copy.

visible_through is the engine’s commit-epoch watermark (the spec’s HlcTimestamp maps onto it at the commit-log layer): the view reflects every commit whose epoch is <= visible_through, and later writes are invisible through it even though they mutate the publishing Table.

Implementations

impl ReadGeneration

pub fn schema(&self) -> &Arc<Schema>

Table schema as of this generation.

pub fn base_runs(&self) -> &[RunRef]

Immutable base sorted runs (r-*.sr) visible in this generation.

pub fn indexes(&self) -> &Arc<IndexGeneration>

The published index generation (all six families).

pub fn visible_through(&self) -> Epoch

Highest commit epoch reflected in this view.

pub fn deltas(&self) -> &TableDeltas

The sealed in-memory deltas captured with this view. The view owns an Arc share of every frozen layer, so the layers stay alive (and unchanged) for as long as the view is pinned.

Trait Implementations

impl Clone for ReadGeneration

fn clone(&self) -> ReadGeneration

Returns a duplicate of the value.

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

Performs copy-assignment from source.