Struct CommitSnapshot 

pub struct CommitSnapshot { /* private fields */ }

A materializable database state: the replay of all valid frames up to a COMMIT.

This is the ONLY independently-materializable WAL state. page_version resolves a page to its image as of this commit (the newest frame ≤ this commit that rewrote the page, else the acquired base image). A frame between commits is never a snapshot.

Implementations

impl CommitSnapshot

pub fn id(&self) -> CommitId

This snapshot’s CommitId.

pub fn db_size_after_commit(&self) -> u32

The database page count once this commit is materialized.

pub fn lsn(&self) -> WalLsn

The salt-qualified WalLsn of this commit (the [H] adapter seam).

pub fn page_numbers(&self) -> Vec<u32>

The 1-based page numbers this commit materialized (base ∪ committed frames up to this commit, capped to db_size_after_commit), ascending.

The carve-at-snapshot primitive iterates these to drive the carving primitives over each page image, WITHOUT assuming the pages form a contiguous 1..=db_size range (a truncating commit or a sparse base image can leave gaps). Every returned page resolves via Self::page_version.

pub fn page_version(&self, page_no: u32) -> Option<CommittedPageVersion>

The image of page_no as of this commit, or None for a page beyond the committed database size that the WAL never rewrote.

Trait Implementations

impl Clone for CommitSnapshot

fn clone(&self) -> CommitSnapshot

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for CommitSnapshot

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

Formats the value using the given formatter.

impl Eq for CommitSnapshot

impl PartialEq for CommitSnapshot

fn eq(&self, other: &CommitSnapshot) -> 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 CommitSnapshot