Struct CatalogSnapshot 

pub struct CatalogSnapshot { /* private fields */ }

v7.11.0 — frozen read-only view of the engine’s committed state. Constructed via Engine::clone_snapshot. Holds clones of the catalog, statistics, clock function, and row-cap config — the four fields the execute_readonly path actually reads. Cheap to Clone (each clone shares the underlying PersistentVec row storage; only the trie root pointers copy). Send + Sync so a snapshot can be moved across tokio::task::spawn_blocking boundaries without coordination.

The contract: a snapshot reflects the engine’s state at the moment clone_snapshot() returned. Subsequent writes to the engine are NOT visible. Callers who need fresher data take a new snapshot.

Trait Implementations

impl Clone for CatalogSnapshot

fn clone(&self) -> CatalogSnapshot

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for CatalogSnapshot

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

Formats the value using the given formatter.